The P800/P802 White Paper is designed to give the reader a deeper understanding of the
features and applications of the P800 and P802.
In this document, the term ‘P800’ is used to denote all models and ‘P802’ to denote the Chinese
model. The differences and additional features of the Chinese language models are described in
more detail in the section ‘Chinese Models in Detail’
The paper gives an overview of the key points of the P800 and a summary specification. The
main operational points of the product are explained. Each functional area is then described in
detail.
Features, specification and User Interface (UI) design are subject to change.
This White Paper is published by:
Sony Ericsson Mobile Communications AB
SE-164 84 Kista, Sweden
Phone: +46 8 508 78000
www.SonyEricsson.com
January 2003
Publication number: LZT 123 943 R2C
This document is published by Sony Ericsson
Mobile Communications AB, without any
warranty.
Improvements and changes to this text
necessitated by typographical errors,
inaccuracies of current information or
improvements to programs and/or
equipment, may be made by Sony Ericsson
Mobile Communications AB at any time and
without notice. Such changes will, however,
be incorporated into new editions of this
document. Any hard copies of this
documents are to be regarded as temporary
reference copies only.
Games .................................................................................................................................. 128
7
P800/P802
P800/802 Overview
• Tri-Band E-GSM 900, GSM 1800, GSM 1900
• GPRS 4+1 slot and HSCSD 2+1 slot
• Large 4096 colour touch screen
•
5-way Jog Dial
•
Memory Stick
•
Bluetooth
• Symbian OS Platform: C++ and Java
• Integrated Digital Camera
• Video and Audio Players
• Image & Sound Personalisation
•
Multimedia Messaging (MMS)
•
SMS, EMS and E-Mail
•
Document Viewers
• Combined Web and WAP browser
• M-Services & MeT
• Personal Organiser
• PC and remote synchronisation (SyncML)
®
Duo® Slot
TM
, IrDA, and USB connectivity
TM
White Paper, January 2003
SDKs
TM
P800 Standard Version and P802 Chinese Version
P800 – Standard Version
•
Europe, Middle East, Americas,
Latin Asia
•
Latin characters (a, b, c…) on the flip
• Latin character handwriting recognition
•
• Chinese Flips and input methods
•
• Chinese dictionary
• Lunar calendar
•
P802 - Chinese version
Mainland China, Hong Kong, Taiwan
Chinese handwriting recognition
Chinese games
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P800/P802
Features and Specification Summary
General
Size: 117 x 59 x 27 mm
Weight: 158g with flip
OS: Symbian OS
TM
V7.0
Processor: ARM 9
User storage: 12 Mbyte (P800); 9 Mbyte (P802)
Memory Stick
®
Duo®
Slot for Memory Stick Duo
16Mbyte Memory Stick Duo supplied
Memory Stick Duo Adaptor supplied
Battery Life
Talk time: Up to 13 hours
Standby time: Up to 400 hours
GSM
Tri-band E-GSM 900, GSM 1800 and GSM 1900
GPRS
Slots: 4+1
Coding scheme: CS-1, CS-2, CS-3, CS-4
Downlink rate: Up to 53.6 kbps (CS-2)
Uplink rate: Up to 13.4 kbps (CS-2)
(CS-2 quoted as this is the fastest scheme in use
today)
HSCSD
Timeslots: 2+1 at 9.6 or 14.4 kbps
Download rate: Up to 28.8 kbps
Upload rate: Up to 14.4 kbps
Screen
Type: TFT
Size, flip closed: 208 x 144 pixels, 40 x 28 mm
Size, flip open: 208 x 320 pixels, 40 x 61 mm
Pixel Size: 0.192 mm
Colour depth: 12-bit (4096 colours)
Surface: Touch-sensitive, anti-reflective
Illumination: Front-light
Flip Closed: Keypad; Numeric, Stroke,
Pinyin, Bopomofo
Flip Open: Chinese character recognition
English character recognition
Stroke, Pinyin, Bopomofo.
Third Party Application Support
SDKs: C++
PersonalJava
J2ME
TM
TM
CLDC 1.0 / MIDP
Phone
Office Handsfree (loudspeaker) function.
Voice dial, voice answer, ‘magic word’ activation
Picture Phone Book – picture of contact displayed.
Polyphonic ringtones
Flight mode – use P800 as PDA with phone off.
SIM-AT
USSD
Specification: Version 1.1
Coverage area: Up to 10 metres (33 feet)
Profiles: Generic Access Profile
Serial Port Profile
Generic Object Exchange Profile
Dialup Networking Profile
Object Push Profile
Headset Profile
Infrared Port
Maximum speed: 115.2kbps
Remote Synchronization
Synchronisation with SyncML compliant servers:
Data: Contacts, Calendar, Tasks
Bearer: HTTP
Protocol: SyncML
Local Synchronization
Data: Contacts, Calendar, Tasks,
Jotter text notes, E-Mail
PC Applications: Lotus
Lotus
Microsoft
2002
Bearer: Bluetooth
®
Organizer® 5 & 6
®
Notes® 4.6, 5.0
®
Outlook® 98, 2000,
TM
, IrDA, USB
Protocol: SyncML
PC Connectivity Solutions
Use the P800 as a wireless modem
2-way File transfer (e.g. pictures, documents)
Backup & Restore user data & settings
Software Installation Utility
Language Change Utility
PC Utilities
Sony Ericsson Image Editor
Sony Ericsson MMS Composer
GPRS Wizard
Security
Device lock
Password generators from RSA Security and
Secure Computing.
Remote Configuration (OTA)
Ericsson/Nokia OTA Settings Specification
WAP Forum specification
Smart Messaging
Games
Chess (including multi-player over SMS)
Solitaire
Five Stones Chess (P802 only)
Stunt Run (on CD-ROM)
Men In Black (on CD-ROM)
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P800/P802
Accessories
Accessory Product
name
Advanced Car Handsfree HCA-20
Bluetooth Car Kit HCB-30
Bluetooth Headset HBH-30
Bluetooth Headset HBH-60
Bluetooth Handsfree HBH-20
P800 Car Holder HCH-32
Advanced Music Mute
Gooseneck Microphone HCE-14
Micro Travel Charger CMT-10
Portable Handsfree HPB-10
Standard Battery BST-15
Cigarette Lighter Adapter CLA-11
System Cable HCC-20
Travel Charger CTR-10
Serial Cable
Deskstand DSS-20
USB Cable DCU-11
P800 Accessory Pack TBD
Case TBD
White Paper, January 2003
HCB-30 HBH-30 CMT-10 DCU-11 Memory Stick
Note: Memory stick sizes, availability and channels to be confirmed.
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P800/P802
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P800 Controls and Operation
The P800 has a large touch-screen and a flip. This provides fast and convenient one-handed
operation with the flip closed plus large touch-screen sophistication with the flip open.
Stereo
headset
socket
Jog Dial
CommuniCam button
Browser Button
Stylus clips to the
side of the P800
Infrared ‘eye’
On/Off switch
ccessory
Connector
Charger
Connector
Memory Stick Duo
slot (under stylus)
External Antenna
Connecto
Camera lens
(On rear face)
Loudspeaker grille
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P800/P802
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White Paper, January 2003
Flip Closed (FC mode)
With the flip closed, known as ‘flip closed’ or FC mode, the P800 can be used like a conventional
mobile telephone with the added benefit of Jog Dial.
TOWARDSAWA
5-way SONY Jog
Current soft-
OK button to
‘Back’ button
Dial
command
action a
command
SELECT
UP
DOWN
CommuniCam button
Browser button
208 x 144 pixel visible
screen
Menu button
Flip
Rotating the Jog Dial takes the user through a menu of
the most important applications. Clicking the Jog Dial or
pressing OK will select the application, for example the
Calendar.
The standby screen may be personalised with
photographs. The user may also personalise the
application menu.
Pressing the Menu button brings up a set of options
relevant for the current application. The Jog Dial may
be used to make a selection, or the corresponding
numeric key on the keypad may be pressed as a
shortcut.
During a phone call, the user has access to most
applications, making it possible to look up
appointments, contacts, etc whilst chatting on the
phone.
The P800 enables Latin characters to be entered via
the keys on the flip. Characters are selected by
pressing the key until the required one is shown. The
P802 supports Chinese character input using Stroke,
Pinyin and Bopomofo.
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Flip Open (FO mode)
When the flip is opened, the large touch-screen is revealed. In ‘flip open’ mode, the stylus may be
used to navigate and enter data. The Jog Dial provides further navigation and selection capability.
The User Interface is Symbian’s established UIQ design, adapted for the narrower 208 pixel
screen.
Application picker
one tap access to the
five most important
applications (use
Large 208 x 320 pixel
The stylus is used to operate the touch-screen and enter text:
configurable)
colour touch screen
Main applications
automatically resize
when the flip is
opened or closed.
Tap here to reach the
pplication Launcher,
from which all
applications can be
reached
Stylus clips to the side
of the P800 for
storage
Status bar provides
signal strength,
battery meter and
other important
information.
Text may be entered using natural handwriting
over the whole screen. Lower case letters are
entered below the
symbol, uppercase in line
with it and numbers above it.
An on-screen keyboard is also available at all
times by tapping on the keyboard icon in the
status bar. Symbol and special character
keyboards may be selected when required.
Cut, Copy and Paste functions are available
here.
In FO mode, the P802 offers Stroke, Pinyin and Bopomofo input methods plus Chinese character
recognition. Numeric and English characters can also be entered using the character recognition.
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Flip Removed
The flip may also be removed. A ‘flip replacement’ cover is clipped in place instead of the flip:
Flip
Replacement
When the flip is open or removed, a ‘virtual flip’ can be displayed on the screen. It works in
exactly the same way as the hardware flip, except that the buttons are represented on the touch
screen. The main uses of the virtual flip are:
• FC input methods (especially for the Chinese versions)
•
SIM-AT
•
Keylock
The virtual flip is enabled or disabled in the Control Panel. When enabled, the symbol is
shown in the status bar. Tapping the symbol displays the virtual flip. The virtual flip is ‘opened’
(removed from the screen) by tapping the arrow symbol
.
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P800/P802
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Application UI Outline
P800 applications generally follow the style guidelines established for Symbian UIQ applications.
The user may select five important applications and display
them on the ‘application picker’ strip across the top of the
screen. The sixth icon at the right always switches to the
Application Launcher.
All applications are listed in the Application Launcher. The
user may select list view with small icons and text, or a
‘finger-size’ icon display of 8 applications per page. One tap
on the list-row or icon will launch (switch to) the desired
application.
The Folder feature enables the user to group applications
into logical folders such as ‘games’ and ‘work’. This feature
is carried through into many applications, enabling
contacts, appointments, notes etc. to be organised
effectively.
The Jog Dial can also be used to navigate up and down;
clicking on an application will navigate to it.
There is no concept of starting or closing applications;
simply navigating to them. When an application is used for
the first time it will start in its basic state, which is typically a
list view. If the user navigates from application A to
application B (using, say, the Application Picker,)
application A will close any open dialogs and views and
return to its initial state ready for the next time it is used.
Data is saved. There are some exceptions, for example the
browser stays at the current page.
Here is an example of a list view. This is the normal state of
the Contacts application.
Tapping on the folder drop-down, the list can be filtered to
show just one folder, for example business or personal.
A tap on the desired item will open the detail view.
Lists typically scroll a page at a time. The scroller may be
found in the lower corner of the screen.
As in the application launcher, the Jog Dial can be used to
select an item. This provides a useful ‘one-handed’ way of
operating the P800 in FO mode.
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P800/P802
White Paper, January 2003
Here is the detail view in the contacts application. The most
important information is displayed directly. Further
information is organised by using tabs; in this case notes
and a picture.
A conventional menu structure is
provided for tasks and actions.
Changing the folder here will reclassify this entry. Entries default to
‘all’ or ‘unfiled’.
Tapping on a telephone number will navigate to the phone
application to make a call. Similarly, tapping an E-Mail
address will navigate to the E-Mail application and create a
new E-Mail to the contact.
Management functions such as delete, copy to Memory
Stick or Send As are performed in detail view.
As before, the Jog Dial can be used to perform these
operations one-handed. Scrolling the Jog Dial will move the
highlight and pressing Select will initiate the chosen action
(telephone call, new e-mail etc.)
Status Bar
The status bar shows the normal items such as signal strength and battery meter. In FO mode,
the icons may be tapped to see further information and access relevant settings. Tapping the
keyboard icon whilst entering text enables the user to switch between handwriting recognition and
on-screen keyboard. More icons are used to indicate temporary conditions such as , Bluetooth
activity, ongoing call and internet connection status.
Signal strengthSound
Keyboard
Temporary status
indicators e.g
Bluetooth, infrared,
new messages
controls
Time
Battery status
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P800 Memory Organisation
Data Storage Locations
The P800 is divided into two parts:
•
A GSM phone part, having flash memory. This is very similar to a conventional mobile
phone such as the T68i
•
An ‘Organizer’ part running Symbian OS and having a large amount of flash and RAM
memory plus a Memory Stick slot and ability to exchange files with a PC.
Note: The ‘Phone’ application which provides the phone MMI exists on the Symbian OS part of
the P800; the GSM stack resides in the GSM phone part.
The diagram below shows the memory organisation of a P800:
The RAM (Random Access) memory is controlled by the Symbian OS operating system and is
not used to store any user or program data. All use is dynamic and managed by the OS. The
RAM is totally re-initialised when the P800 is started.
Two banks of 16Mbyte flash memory are built into the P800, making a total of 32Mbyte. Flash
memory retains data even with no power applied. Unlike some PDA devices, the P800 does not
require a small ‘memory backup’ battery. Data stored on the P800 is therefore not subject to loss
due to such a battery running down.
The first bank is used like a ROM. It stores the Symbian OS (UIQ) operating system, the built-in
applications and some essential multimedia information like a default ring tone. It also stores the
language files for UK English. This is the default language of the P800.
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Note: The extensive MMI of the P800 means that it is impractical to hold many languages inside
the phone, as is done for some other models.
The second 16Mbyte bank of flash memory is divided into two parts. The first 4 Mbyte is
reserved. It is essentially an extension of the ROM area.
The rest of the second bank provides a ‘C:’ drive of 12 Mbyte capacity. This behaves just like a
normal disk drive. Some folders can even be viewed and managed from a connected PC. In the
Chinese version the reserved area is 7Mbyte and the C: drive is 9Mbyte
When a P800 is updated at a Sony Ericsson Service Point, or over the internet using the Sony
Ericsson Update Service, all three banks of flash memory will be rewritten. User data that has
previously been backed up to a PC can be restored to the C: drive afterwards.
User Storage
The user storage space (C: drive) is shared across applications without any imposed restrictions,
apart from the whole space becoming full. For example, one user might use the entire user
storage space for photographs, in which case over 200 can be stored. Another user might load a
third party street map application and a number of street maps. In this case, the application will
take up some of the storage space and so will each map. When space becomes limited, the user
can choose to remove some maps.
Unlike a PC, the user does not need to be aware of the underlying filing system. Applications will
always make sensible choices and store information automatically, simplifying management of
data. Third party applications may implement more complex file management solutions where
required.
Additional storage space is available by using Memory Stick Duo. A 16Mbyte Memory Stick Duo
is included with the P800. Any number of Memory Stick Duos may be used with the P800. See
‘Memory Stick Duo’ later in this paper for more information. Memory Sticks up to 128Mbyte
capacity are supported.
Depending on the application, data can be beamed, mailed, uploaded to the web or transferred
over the link to a PC in order to archive and create free user space on the P800 – see
‘Synchronisation and Data Transfer’ later in this paper.
User Storage configuration in a new P800
Applications and information are placed in the internal storage of the P800 in the factory. This
provides sample demonstration, educational, multimedia and fun content so that the P800 can be
used directly out of the box. Much of this can be deleted by the user in order to make the space
available for personal use.
This section describes the case for a generic (non-customised) P800.
User Data
This space is initially empty. Normal uses are:
• User-data associated with built-in applications (e.g. Messaging, Contacts)
• Applications installed by the user
•
Multimedia content added by the user
Settings
Settings such as dial-up networking and e-mail account information. Initially Empty.
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Sony Ericsson Multimedia Content
Sound, pictures, video and other files chosen to show off the capabilities of the P800. This is
described in more detail in ‘Customisation and Personalisation’ later in this document.
Application Files
Three applications are stored on the C drive: Chess, Solitaire and P800 Demonstration. The user
may uninstall them in order to free space on the C: drive.
Language Files
The generic P800 is prepared for different markets. A maximum of 6 languages can be placed in
this area. This is set by convention; the file system does not impose any limit other than overall
Empty
Populated with data files in the factory; user can use and delete these files and
applications.
Files are loaded in the factory and may be deleted only by the Startup and
Master Reset process.
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P800/P802
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capacity. A ‘Load Module’ is constructed containing the languages for a given market. Therefore
a number of load modules is specified for the P800 to cover all required markets.
Language is selected at First Startup and Master Reset.
Action when P800 is Initialised
When the P800 is first started, the user is prompted to select a language as part of the
initialisation procedure. The P800 is then restarted.
If the user selected UK English, all of the alternative language files will be deleted, making 2.6MB
extra space free on the C: drive in the above example.
If the user selected any language other than UK English, then the selected language files are
retained on the C: drive and the other language files are deleted. In this example, we assume that
the user has selected Swedish and therefore the Danish, Finnish and Norwegian files are deleted
during the restart procedure. In this case, approximately 1950KB is made free on the C: drive.
The diagram below illustrates this for a generic P800, where the free user data area on the C:
drive grows to 8.15MB.
P800 C: drive contents after first user initialisation
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Action at Master Reset
Master Reset will delete everything on the C: drive except for Languages and (if selected by the
user) user-installed applications.
If a newly-initialised P800 goes through a Master Reset, the C: drive will look like this afterwards.
If the user had included user-installed applications, then the P800 Demo, Chess and Solitaire
would be deleted also.
P800 C: Drive after Initialisation and Master Reset
Data can be restored as follows:
If the user has previously backed up the P800 using the PC Suite, then the C: drive can be
restored to the exact condition it was in when the backup was made.
Otherwise, data can be re-loaded from the following places:
•
Sony Ericsson Multimedia Content from the P800 Multimedia CD-ROM
• Applications Chess, Solitaire and P800 Demo from the P800 Multimedia CD-ROM
Since Multimedia content is easily transferable using Memory Stick, infrared or Bluetooth wireless
technology beaming, it is simple to restore favourite content from someone else’s P800.
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Folder View of Internal Storage
This section explains in more detail how the data is organised on the C: drive.
Note: The actual file and folder structure on the P800 is not exactly as shown in this document.
When viewed from a PC using PC Suite for P800, the ‘C:’ drive is named ‘Phone Memory’, but
only a subset of the folders is accessible from the PC.
Language files are represented by the Language Files folder. The user has no access to this
data.
Multimedia is stored in a structure beneath the Media Files folder. There is a folder for each
media type: audio, video and image. Documents (such as Microsoft Word files) are stored under
the Document folder. An Other folder provides a place for files that do not fit into the other
categories.
Beneath each media type and documents, the material on the P800 is broken into Folders. For
each named folder in the related P800 application, a folder is created beneath the applicable
media type. For example if the user creates a ‘MyMP3’ folder in the Audio Player application, a
‘MyMP3’ subfolder is created beneath the audio folder. Unfiled folders are created in the initial
folder structure and all material, including Sony Ericsson Multimedia Content, is placed in the
unfiled folder by default.
In the above diagram, the folder structure is shown and the Sony Ericsson Multimedia Content
(audio) files can be seen.
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Phone and PIM Applications
Phone
The P800 is a full-featured mobile phone having full integration with the other functions of the
device, including third party applications.
The phone includes useful and fun features such as:
•
Personalised ringtones – conventional or polyphonic ringtones can be set in Contacts,
giving audible indication of who is calling. Supported formats are AMR, Au, iMelody,
MIDI, RMF (Beatnik) and WAV.
• Picture Phone Book – if there is a picture of the person in Contacts, it will be displayed
when making outgoing calls and when receiving the CLI with an incoming call.
• Quick access back to the entry in Contacts, making it easy to try an alternative number or
send an E-Mail if the contact is unavailable or busy.
•
Voice dialling – make a call by speaking the contact’s name. The contact’s name may be
recorded when entering/editing the entry in Contacts. The call is made by pressing the
OK button on the flip or the button on the headset. If a ‘magic word’ is recorded, contacts
may be dialled by saying the magic word followed by the contact name. It is then not
necessary to press any buttons.
• Voice answer – an incoming call may be answered or sent busy signal, using the words
recorded for ‘answer’ and ‘busy’. There is 40 seconds of storage space allocated for
voice dialling and voice answer. This is enough for approximately 50 words (contact
names plus ‘magic word’, ‘answer’ and ‘busy’)
• Access to most other applications whilst talking on the phone.
•
Office handsfree (speakerphone) which is enabled when the flip is open, making it easy
to access applications such as Calendar and Jotter whilst talking.
• Flight mode enables the P800 to be used as a PDA in situations where radio transmitters
may not be used. The GSM and Bluetooth transmitters (and receivers) are switched off.
In FC mode, the phone is driven by the keypad,
like a conventional mobile phone.
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If the flip is opened, the phone application re-scales itself to the full screen size. Other P800 flip
closed applications are able to do this too.
A traditional keypad view is
available.
The shortcut view provides
one-touch dialling to 9
contacts.
A call log view provides summary
details of calls made, received and
missed. Full details can be viewed
from here.
The shortcut view automatically takes pictures from Contacts and places them under the shortcut
button. The Jog Dial also works in this view; scroll to highlight the desired contact and press
Select to call.
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Contacts
The P800’s Contacts application holds the details of all the user’s contacts. It is available in FC
and FO modes and is fully integrated with the phone and other PIM applications. Each contact
can contain multiple phone numbers and E-Mail addresses, name and address details, personal
notes and a photograph of the contact or other image. This information will typically be
synchronised in to the P800 to begin with; contact data can also be added and edited on the
P800 itself. Local and remote synchronisation is possible to the SyncML standard.
Contact data can be beamed in or out using Infrared and Bluetooth. It can also be sent and
received using messaging. See the Object Exchange section for full details.
Contacts are displayed in a
list, which may be filtered by
folder such as business or
personal. Use the Jog Dial or
stylus to select the required
person.
Key communication details are
displayed first. One tap will
initiate a phone call, new
message or URL in the
browser. The Jog Dial can
also be used.
Photograph of Rosie stored in
Contacts.
A voice dial tag can be
recorded, enabling Rosie to be
called by saying her name.
A personal ringtone sound can
also be set. It will be played
whenever Rosie calls and her
CLI is passed to the P800.
Audio formats for ringtones:
AMR, AU, iMelody, MIDI,
RMF, WAV.
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Calendar
The Calendar application keeps track of appointments and events and enables reminder alarms
to be set. The alarm sound can be personalised, using any of the supported sound formats.
Appointments can be shared using Infrared and Bluetooth beaming and also messaging. Local &
remote synchronisation are both supported using SyncML. The P802 supports the lunar calendar.
Week and month views
provide a high level view of
Convenient daily summary
view.
One tap shows the details of
an appointment.
free and occupied time.
Tasks
Tasks is a simple yet powerful application which manages a list of tasks to be done. Task items
may be beamed, exchanged using messaging and synchronised locally and remotely using
SyncML.
List of current tasks
Detail view of a task
Notes attached to a task.
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Jotter
The Jotter application provides a quick means of making notes in either text or sketch format.
Notes are displayed in a list
format for fast reference. The
pencil indicates a sketch.
Text notes can be input using
handwriting recognition or the
virtual keyboard.
Time, Voice Memo and Calculator
Time is a sophisticated alarm
clock which can show the time
both locally and in another
time zone. Alarms can be set.
The alarm signal can be
personalised using sound
clips.
Voice Memo is a simple
screen-driven dictation
machine with the added
advantage that recordings can
be beamed and exchanged via
messaging. It can also be
used to record a personal
ringtone.
Diagrams and sketches can
be made in colour, using the
stylus like a pen.
Calculator performs like a
standard desk calculator, and
is always available from the
application launcher.
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Multimedia
The P800 has extensive multimedia capability in many applications. This section explains the
different standards supported and provides a summary of capability by application.
Audio Formats
The table below explains the various audio formats supported by the P800, together with
indicative file sizes for 60 seconds of playback.
Format Example
File Size
AAC
AMR 94kB
(12.2
kbps)
AU 1.35MB
(22.05
kHz)
iMelody
MIDI 20kB
MP3 960kB
RMF 72kB
WAV 1.35MB
6kB
(128kbps)
(22.05
kHz)
Description
Advanced Audio Coding. This is one of the audio compression formats
defined within the MPEG-2 standard. Compared to MP3 it has more
advanced features and is more efficient. AAC is commonly used as the
audio component of an MPEG-4 video file or stream. The P800 Video
Player can play AAC format audio which is encoded into an MPEG-4 file or
stream. Such audio-only content is not common.
Adaptive Multi Rate. AMR is a speech compression format that is highly
optimised for the mobile environment, requiring as little as 4.75kbps
bandwidth. AMR is used to convey voice recordings in MMS, when the
P800 records at a rate of 12.2kbps. Sample rate is 8kHz and processing is
done on 20ms frames.
Similar to WAV, this is an audio format commonly used in the Macintosh,
unix and java worlds. It is not commonly used for content on mobile
devices.
A format commonly used for monophonic ringtones.
MIDI means Musical Instrument Digital Interface. MIDI specifies a format
which describes music in a binary format which may then be stored as a
file. Unlike the other formats, MIDI is not a recording of music but a
description which enables a local synthesizer to play the music from the
instructions included in the MIDI file. MIDI is ideal for polyphonic ringtones.
The P800 includes the Beatnik mini-BAE
providing support for General MIDI Level 1.
MPEG1 Layer 3 audio compression. MP3 is a very popular format for
downloading songs from the internet. It is also increasingly available in
personal and in-car audio equipment. MP3 files can be created with
different size/quality compromises.
Rich Music Format
compact size of MIDI files with the high quality of sampled sound.
This is an typically used for short ‘alert’ sounds. The size of files is
determined by sample rate, bits-per-sample and mono/stereo.
TM
A file format developed by Beatnik combining the
TM
(Beatnik Audio Engine)
29
P800/P802
White Paper, January 2003
Loudspeaker Characteristics
General
The P800’s built-in loudspeaker is most sensitive to middle and high
frequencies; tones below 400Hz generate distortion instead of bass.
Therefore, sampling frequency for WAV should not be reduced below
16kHz, otherwise the characteristic low frequency sampling ‘ringing’ will
be very distinct compared to that of a more linear system.
Recommended WAV file format for the loudspeaker is 22.050kHz
sampling rate, 8-bit samples and 1-channel (mono).
Recommended MP3 setting for playback over the loudspeaker is 64kbps
P800 Loudspeaker
mono.
Ringtones
The stimuli should be kept around 4 kHz in order to generate high SPL (~90dBSPL@40cm) ring
tones (see frequency response in figure below).
The speaker will accentuate with-in this band and alter the timbre of the ringer tones for
frequencies around 2kHz. E.g. a square wave at 500Hz will not sound the same as a square
wave at 2 kHz as is the case for a more linear system.
Recommendation: Keep the bandwidth of stimuli as narrow as possible.
For discrete signals (~80dBSPL@40cm) the band broadens to 2-5 kHz. These types of stimuli
can be generated at a larger bandwidth as an analogue to the above reasoning.
Stereo Headphone Characteristics
The P800 is supplied with a pair of high quality stereo
headphones.
Recommended WAV file format for playback over the
headphones is 44.1kHz sampling rate,16-bit samples and
2-channel (stereo). Files to this standard are very large –
use WAV only for short bursts of sound.
Recommended MP3 settings are 128kbps stereo.
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