Datasheet TDA9170 Datasheet (Philips)

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INTEGRATED CIRCUITS

DATA SH EET

TDA9170

YUV picture improvement processor based on histogram modification

Preliminary speciﬁcation File under Integrated Circuits, IC02

Philips Semiconductors

October 1994

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based on histogram modiﬁcation

FEATURES

• Picture content dependent non-linear Y and U, V processing by histogram analysis

• Adaptive and variable gamma correction controls

• Black and white stretch capabilities

• Transparent I2C-bus control

• On-chip window generator for valid histogram

measurement and black detection.

GENERAL DESCRIPTION

The TDA9170 is a transparent analog video processor with a YUV interface. It offers three main luminance processing functions any combination of which can be selected.

The luminance transfer is controlled in a non-linear manner by the distribution (in 5 discrete histogram sections) of the luminance values measured in a picture. As a result, the contrast ratio of the most important parts of the picture will be improved.

Black restoration is available in the event of a set-up in the luminance signal. A variable gamma function, after the histogram conversion, offers the possibility of excellent brightness control.

To maintain a proper colour reproduction, the saturation of the U and V colour difference signals are controlled as a function of the actual non-linearity in the luminance channel.

The TDA9170 concept has maximum flexibility with the optional on-board I select) and window control. The supply voltage is 8 V. The device is mounted in a 32 pin SDIP envelope.

TDA9170

C-bus (including hardwired address

ORDERING INFORMATION

TYPE NUMBER

NAME DESCRIPTION VERSION

TDA9170 SDIP32 plastic shrink in-line package; 32 leads (400 mil) SOT232-1

PACKAGE

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based on histogram modiﬁcation

BLOCK DIAGRAM

TDA9170

October 1994 3

Fig.1 Block diagram.

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based on histogram modiﬁcation

PINNING

SYMBOL PIN DESCRIPTION

DWS 1 default window select input VARGAM 2 variable gamma input AMPNLA 3 amplitude non-linearity input ADGAM 4 adaptive gamma input UIN 5 colour difference U input V

ref

VIN 7 colour difference V input AGND 8 analog ground V

DDA

SC 10 sandcastle input BOF 11 black offset on/off input YIN 12 luminance input AMPSEL 13 amplitude select input TAUBP 14 time constant black peak TAUBL 15 time constant black loop HM1 16 histogram segment memory 1 HM2 17 histogram segment memory 2 HM3 18 histogram segment memory 3 HM4 19 histogram segment memory 4 HM5 20 histogram segment memory 5 YOUT 21 luminance output TAUHM 22 time constant histogram

n.c. 23 not connected V

DDD

DGND 25 digital ground VOUT 26 colour difference V output DT 27 test option UOUT 28 colour difference U output TM 29 test option SDA 30 serial data input/output

SCL 31 serial clock input (I ADR 32 address select input (I

6 reference supply voltage output

(+4 V)

9 analog supply voltage

measurement loop

24 digital supply voltage (+5 V)

C-bus)

TDA9170

Fig.2 Pin configuration.

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based on histogram modiﬁcation

FUNCTIONAL DESCRIPTION Y input selection and ampliﬁcation

The dynamic range of the luminance input amplifier can be switched between 0.3 and 1 V (excluding sync) either externally (pin AMPSEL) or by I Amplitudes that exceed the corresponding specified range (e.g. the sync) will be clipped internally. The input is clamped during the logic HIGH period of the clamp which is defined by the sandcastle reference and should be DC-decoupled with an external capacitor.

Black offset detection and correction

The black detector measures and stores the blackest part of the picture within a defined window in each field. Any difference between this value and the value measured during the black clamp period is regarded as black offset. In a closed loop configuration, the black offset is held until a predefined value of the full scale (FS) value is fed back to the input stage where it is partly compensated for. Depending on the loop gain, 30% to 50% of the offset value is counteracted. The loop gain is also a function of the adaptive and variable gamma settings. The black offset correction mechanism can be switched on and off by

C-bus via the BON bit (see Table 6), or externally with

the I the black offset on/off switch (BOF pin 11).

Two external time constants are required to ensure correct performance of the black detector; a loop filter time constant (TAUBL) for the loop dynamics and a time constant for memorizing the darkest parts of the picture (TAUBP) in just one field. During the field retrace the time constant TAUBP is first sampled and then preset to a value that corresponds to the maximum black offset.

The corrected black offset is related to the nominal signal amplitude which is reset to 100% FS via an amplitude stretch function. Luminance values beyond FS are not affected. Additionally, this offset is also used to set the adaptive gain (see Section “Adaptive gamma”).

Histogram measurement

The histogram distribution is measured in real time over five segments (HM1 to HM5) within a defined window period of each field. During the window period, the video is in one segment, a corresponding external capacitor C is loaded via a current source. At the end of the field five segment voltages are stored from the external capacitors into on-board memories. The external capacitors are discharged and the measurements are restarted.

C-bus (AMPSEL bit).

HMx

TDA9170

Any part of the picture that does not contribute to the information within the total picture should be omitted from the histogram measurement. The miscount detector disables measurements until it detects changing parts. Additionally, luminance values close to FS (or white) do not contribute sufficiently in order to maintain the absolute light output. This procedure is allowed because the eye is less sensitive to details in white.

As the miscount detector shortens the effective measurement period and, because of spreads of internal and external components, the current source is controlled within in a closed loop so as to maintain a constant average value of the sum of the segment voltages. The dominant time constant of the closed loop is external and can be tuned with an appropriate capacitor connected to TAUHM (pin 22).

Processing of the measured histogram values

IELD AVERAGING OF HISTOGRAM VALUES

With very rapid picture changes, also related to the field interlace, flicker might result. The histogram values are averaged at the field rate to reduce these flicker effects. The time constant of the averaging process is adapted to the speed of the histogram changes.

DAPTIVE GAMMA

A The output voltage of the first segment is fed to a variable

gain amplifier with a gain between 1 and 3. In this way luminance values in the ‘black’ segment have a larger weight. In our perception black parts are expanded, as occurs with gamma control. However, the effective contribution to the non-linear gain is only relevant for moderate segment voltages and hence the term adaptive gamma.

The adaptive gamma gain is amax-function of a fixed gain part and a dynamic gain part. The fixed gain part can be set externally with the adaptive gamma gain control (ADGAM) or via the I2C-bus.

The dynamic part of the adaptive gamma gain is controlled by the measured black offset value from the black detector.

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YUV picture improvement processor based on histogram modiﬁcation

ADAPTIVE WHITE-POINT STRETCHING For dominant HM4 and HM5 voltages or large white parts

the histogram conversion procedure makes a transfer with large gain in the white parts. However, the amount of light being emitted from the picture is considerably reduced. The white stretcher introduces additional overall gain for increased light production and, as a result, violates the principle of having a full-scale reference.

TANDARD DEVIATION

For pictures in which segments of the histogram distribution are very dominant, with respect to the others, the non-linear amplification should be reduced to compensate for pictures with a flat histogram distribution. The standard deviation detector measures the spread of the histogram distribution in the segments HM1 to HM5 and modulates the user setting of the non-linear amplifier.

Non-linear ampliﬁer

The stored segment voltages, relative to their average value and averaged over two fields, determine the individual gain of each segment in such a way that continuity is guaranteed for the complete range. The maximum and minimum gain of each segment is limited. Apart from the adaptive white-point stretching the black and white references are not affected by the non-linear processing. The amount of linearity can be controlled externally at AMPNLA (pin 3) or via the I

Variable gamma function

C-bus.

TDA9170

Timing generator

The TDA9170 is equipped with a transparent internal timing generator for window purposes. As a timing reference the relevant sandcastle (SC) can be used. The window enables the black measurement and the histogram measurement circuitry. The internal timing generator is basically intended for system invariant operation. The default window handles all existing norms and disables measurement in subtitles or logos. This default window is preset at power-up and can be selected with a logic HIGH level at the default window select DWS (pin 1). If not selected the blanking of the sandcastle will define the window borders.

However, using the I control bits (see Table 3), the window format can also be user-programmed. The horizontal window generator synchronizes on the rising edge of the burst key/clamp key of the external sandcastle reference with an adjustable window start and stop delay. The vertical window generator synchronizes on the falling edge of the first burst key/clamp key after a field pulse recognition.

C-bus speciﬁcation

The I2C-bus is designed for transparent use. At power-up all registers are preset for system invariant and external control. All pins related to the I2C-bus can be left open-circuit when the I2C-bus is in the standby mode. If the sleep mode bit in the control register is set all settings are left to bus control. For the relevant registers and addresses see Tables 2 to 8.

C-bus and setting the WD1 and WD2

As well as the histogram conversion, a variable gamma function can be applied to ensure excellent brightness control. It is intended as an alternative to the DC-offset of the classic brightness user control; it maintains the black and white references. The gamma ranges from 0.5 to 1.5. The gamma can be set externally at VARGAM (pin 2) or via the I

Colour compensation

Non-linear luminance processing influences the colour reproduction, mainly the colour saturation. Therefore, U and V signals are also processed for saturation compensation. The U and V input signals are clamped during the logic HIGH period of the clamp which is defined by the sandcastle reference and should be DC decoupled with external capacitors.

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C-bus.

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YUV picture improvement processor based

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on histogram modiﬁcation

Table 1 Slave address.

A6 A5 A4 A3 A2 A1 A0 R/W

110100ADRX

Table 2 Control function.

CONTROL FUNCTION

Control REG 00 X X X BON WD2 WD1 AMS SLP User variable

gamma Adaptive gamma DAC 02 X X D5 D4 D3 D2 D1 D0 Non-linear

ampliﬁer Line start stop REG 04 ST3 ST2 ST1 ST0 SP3 SP2 SP1 SP0 Field start stop REG 05 ST3 ST2 ST1 ST0 SP3 SP2 SP1 SP0 Status REG − XXXXXXXPOR

TYPE SUB-ADDRESS

DAC 01 X X D5 D4 D3 D2 D1 D0

DAC 03 X X D5 D4 D3 D2 D1 D0

(1)

D7 D6 D5 D4 D3 D2 D1 D0

DATA BYTE

Note

1. Valid sub-addresses: 00 to 05 (HEX); auto-increment mode available for sub-addresses.

Table 3 Window select bits (WD1 and WD2).

WD1 WD2 FUNCTION

0 0 default window 0 1 window by sandcastle blanking 1 X user window

Table 4 Amplitude select bit (AMS).

LOGIC LEVEL FUNCTION

0 0.3 V luminance 1 1 V luminance

Table 5 Sleep mode bit (SLP).

LOGIC LEVEL FUNCTION

0 sleep 1I

Table 6 Black offset compensation enable bit (BON).

LOGIC LEVEL FUNCTION

0 disabled 1 enabled

C-bus control

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Window formats Table 7 Line frequency start stop format.

LINE WINDOW

Start (LWS) Stop (LWP)

(1)

4.5

26.5

⁄

64fh

⁄

64fh

+1⁄

+2⁄

TIMING

× DEC(ST3, ST2, ST1, ST0) µs

64fh

× DEC(SP3, SP2, SP1, SP0) µs

64fh

Default DEC(ST3, ST2, ST1, ST0) = 2

DEC(SP3, SP2, SP1, SP0) = 14

Notes

1. Start and stop events are relative to the leading edge of the BK/CLP pulse of the sandcastle.

2. fh is defined as the line frequency.

Table 8 Field frequency start stop format.

FIELD WINDOW

(1)

Start (FWS) 10 + 6 × DEC(ST3, ST2, ST1, ST0) lines Stop (FWP) 121 + 10 × DEC(SP3, SP2, SP1, SP0) lines Default DEC(ST3, ST2, ST1, ST0) = 9

DEC(SP3, SP2, SP1, SP0) = 4

(2)

TIMING UNIT

TDA9170

UNIT

Note

1. The start event is relative to the trailing edge of the first BK/CLP pulse after a field pulse recognition. The stop event

is relative to the actual start event.

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YUV picture improvement processor based

TDA9170

on histogram modiﬁcation

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT

DDA

DDD

ref

stg

amb

Notes

1. Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 kΩ resistor.

2. Machine model: equivalent to discharging a 200 pF capacitor through a 0 Ω resistor.

QUALITY SPECIFICATION

analog supply voltage −0.5 +8.8 V digital supply voltage −0.5 +5.5 V reference supply voltage −0.5 +5.5 V voltage input/output on any other pin −0.5 V

DDA

+ 0.5 V storage temperature −55 +150 °C operating ambient temperature −10 +70 °C electrostatic discharge note 1 −2000 +2000 V

note 2 −200 +200 V

In accordance with

“SNW-FQ-611 part E”

Reference Handbook”

. The Handbook can be ordered using the code 9398 510 63011. All pins are protected against

. The numbers of the quality specification can be found in the

electrostatic discharge by means of clamping diodes.

Latch-up

At T

= 70 °C all pins meet the specification as follows, except for pins 6 and 7 at positive trigger currents:

amb

> 100 mA or V

trigger

<−100 mA or V

trigger

pin 6, V

ref

pin 24, V

: I

DDD

trigger

: I

trigger

> 1.5V

<−0.5V

> 40 mA or V

> 70 mA or V

DDA(max)

> 1.5V

DDA(max)

> 1.5V

DDA(max)

THERMAL CHARACTERISTICS

SYMBOL PARAMETER VALUE UNIT

th j-a

thermal resistance from junction to ambient in free air 48 K/W

“Quality

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YUV picture improvement processor based

TDA9170

on histogram modiﬁcation

CHARACTERISTICS

=8V; T

DDA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Supply (pins 6, 9 and 24)

DDA

DDD

ref

DDA

o(24)

o(6)

Luminance input/output selection

UMINANCE INPUT (PIN 12); note 1

i(Y)

i(Yclamp)

ib(Y)

LUMINANCE INPUT VOLTAGE RANGE SELECTION AMPSEL (PIN 13); note 2 V

i(SEL)l

i(SEL)h

ib(SEL)

LUMINANCE OUTPUT (PIN 21) V

o(Y)

oYclamp

Y(nl)

G(n)

Black detection and correction

=25°C; unless otherwise speciﬁed.

amb

analog supply voltage 7.2 − 8.8 V digital supply voltage − 5.0 − V reference supply voltage − 4.0 − V analog supply current − 40 − mA output impedance −−250 Ω output impedance −−250 Ω

luminance input voltage AMPSEL = 0 0.3 −−V

AMPSEL = 1 1.0 −−V

input voltage level during

− 1.5 − V

clamping input bias current −−0.1 µA

input voltage selection for lower

−−1.5 V

range input voltage selection for

3.5 −−V

higher range input bias current −−0.1 µA

luminance output voltage AMPSEL = 0 0.3 −−V

AMPSEL = 1 1.0 −−V

output voltage level during clamping

AMPSEL = 0 − 2.9 − V

AMPSEL = 1 − 2.0 − V output noise voltage 52 −−dB luminance bandwidth transparent 7 9 − MHz non-linear processing

10 −−MHz

luminance bandwidth black level error no offset; transparent −−1% nominal gain error no offset; transparent −−8%

LACK DETECTOR

B Bl

osd(max)

maximum black offset detection at the input

osc(max)

maximum black offset correction at the input

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23 25 27 %

81012%

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YUV picture improvement processor based

TDA9170

on histogram modiﬁcation

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

PICTURE AMPLITUDE STRETCH E

G(s)

BLACK OFFSET CORRECTION ON/OFF SWITCH BOF (PIN 11); note 2 V

i(blos)

ib(blos)

TIME CONSTANT CONTROL TAUBP (PIN 4); see Fig.3 I

BP(d)

ibBP

BP(l)

BP(h)

TIME CONSTANT CONTROL TAUBL (PIN 5); see Fig.4 I

ibBL

BL(l)

BL(h)

Histogram measurement

gain error after stretch maximum offset −−1%

input voltage level correction off −−1.5 V

correction on 3.5 −−V input bias current −−0.1 µA

discharge current −−3.5 mA input bias current −−0.1 µA control voltage lower limit − 1.0 − V control voltage upper limit − 2.5 − V

input bias current −−0.1 µA control voltage lower limit − 2.0 − V control voltage upper limit − 3.5 − V

ISTOGRAM UPDATES AT HMX (PINS 16 TO 20)

HMb

HM(av)

segment bleeder accuracy −−2% average voltage level for

5 segments

HM(min)

HM(max)

ibHM

minimum segment voltage level 0 −−V maximum segment voltage level − 5.0 − V input bias current −−0.1 µA

TIME CONSTANT CONTROL TAUHM (PIN 22); see Figs 5, 6 and 7 I

ibTHM

THM(l)

THM(h)

input bias current −−0.1 µA control voltage lower limit − 1.0 − V control voltage upper limit − 2.0 − V

MISCOUNT DETECTION Q

mc(d)

p(mc)

o(mc)

miscount detection level − 5 − % miscount propagation delay 20% step − 25 − ns miscount detection on-time for

each event

Y(mc)

mismatch propagation and luminance delay

mc(aW)

miscount activation level at

no miscount − 90 − % white

mc(dW)

miscount de-activation level at

miscount − 87 − % white

− 1.0 − V

0.31 0.36 0.41 µs

−−20 ns

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YUV picture improvement processor based

TDA9170

on histogram modiﬁcation

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

Processing of measured histogram values

ADAPTIVE GAMMA CONTROL RANGE G

adg(min)

adg(max)

ADAPTIVE GAMMA SETTING ADGAM (PIN 4); note 3; see Fig.8 V

adg(l)

adg(h)

ibADG

adp(min)

adp(max)

ADAPTIVE GAMMA BY BLACK OFFSET G

adb(min)

adb(max)

WHITE-POINT STRETCH G

minimum gain for HM1 − 1 − maximum gain for HM1 − 3 −

control voltage lower limit − 1.75 − V control voltage upper limit − 3.25 − V input bias current −−0.1 µA minimum gain for HM1 no offset; G maximum gain for HM1 no offset; G

minimum gain for HM1 no offset; G maximum gain for HM1 maximum offset;

VAR

maximum gain luminance for white stretch

HM-pattern = 01103:

Gnl=1

=1 − 1 −

VAR

=1 − 3 −

VAR

= 1 − 1 −

VAR

− 2.5 −

− 1.09 −

Non-linear ampliﬁer

ON-LINEAR GAIN SET BY HMX (PINS 16 TO 20)

N Q

nl(b)

nl(min)

nl(max)

segment bleeder accuracy −−2% minimum gain segment HM-pattern = 31100:

maximum gain segment HM-pattern = 31100:

NON-LINEARITY SETTING AMPNLA (PIN 3); note 3 V

V I

ib(nl)

nl(l) nl(h)

control voltage lower limit − 1.75 − V control voltage upper limit − 3.25 − V input bias current −−0.1 µA

DYNAMICS t

d(nl)

delay between linear and non-linear path

Variable gamma

ARIABLE GAMMA CONTROL RANGE

VAR(min)

minimum variable gamma setting

VAR(max)

maximum variable gamma setting

− 0.36 −

Gnl=1

− 2.28 −

Gnl=1

−−20 ns

− 0.5 −

− 1.5 −

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based

TDA9170

on histogram modiﬁcation

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

VARIABLE GAMMA SETTING VARGAM(PIN 2); note 3 V

VAR(l)

VAR(h)

VAR(lt)

ibVAR

Colour difference processing

OLOUR DIFFERENCE INPUTS UIN AND VIN (PINS 5 AND 7)

C V

i(UIN)

i(VIN)

i(cl)

COLOUR DIFFERENCE OUTPUTS (PINS 28 AND 26) ∆V

o28

∆V

o26

o(cl)

off

B bandwidth transparent 20 30 − MHz

control voltage lower limit − 1.75 − V control voltage upper limit − 3.25 − V control voltage for linear transfer − 2.5 − V input bias current −−0.1 µA

input voltage 1.8 −−V input voltage 1.8 −−V input bias current (pins 5 and 7) −−0.1 µA input voltage level during

− 1.5 − V

clamping

output voltage range with

150 −−%

respect to the input (pin 28) output voltage range with

150 −−%

respect to the input (pin 26) output voltage level during

− 2.3 − V

clamping offset error transparent −−1% gain error transparent −−5%

Timing

ORIZONTAL WINDOW GENERATION

H fh line frequency 15 − 16 kHz

Default window setting (with respect to start BK/CLP pulse)

dh(ws)

dhd(wp)

default start window − default window stop −

6.5

54.5

⁄

64fh

⁄

64fh

−

User window generation with I2C-bus (with respect to start BK/CLP pulse)

hws(min)

hws(max)

hwp(min)

hwp(max)

minimum start window − maximum start window − minimum window stop − maximum window stop −

4.5

19.5

26.5

56.5

⁄

64fh

⁄ ⁄ ⁄

64fh 64fh 64fh

−

VERTICAL WINDOW GENERATION fv vertical frequency 45 − 65 Hz

Default window setting (start event with respect to start detected ﬁeld blanking, stop event with respect to start event)

dvws

dvdwp

default window start − 64 − lines default window stop − 161 − lines

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based

TDA9170

on histogram modiﬁcation

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

User window generation with I2C-bus

vsw(min)

vsw(max)

vwp(min)

vwp(max)

Default window select DWS; (pin 1): note 2 V

isc(DWS)

id(DWS)

ibDWS

Sandcastle input SC; (pin 10)

i(SC)

i(sw)

PULSE WIDTH RESTORATION

CLP t

d(clp)

C-bus speciﬁcation

minimum window start − 10 − lines maximum window start − 100 − lines minimum window stop − 121 − lines maximum window stop − 271 − lines

voltage input level for window

−−1.5 V

by SC blanking voltage input level for default

3.5 − 5.5 V

window input bias current V

DWS

= V

DDA

−−10 µA

voltage input level no blanking; no clamp − 0 1.0 V

with blanking; no clamp 1.2 1.5 1.8 V

with blanking and clamp 3.1 3.5 3.9 V input sync width no vertical sync −−15 µs

with vertical sync 35 −−µs

internal CLP pulse width

−−100 − ns

difference

ADDRESS SELECT ADR (PIN 32) V

iADR

input voltage level A0 = 0 −−1.5 V

A1 = 1 3.5 − 5.5 V

ibADR

input bias current −−0.1 µA

TEST PINS TM AND DT (PINS 29 AND 27) V

i(test)

input voltage level −−0.5 V

Overall output performance

d(YUV)

delay from input to output of

transparent − 50 100 ns YUV

dm(YUV)

w(YUV)

delay of matching YUV transparent − 10 20 ns crosstalk from window any channel −−−60 dB

Notes

1. Input amplitude values greater than the minimum specified range are still processed. However, the gain will slowly saturate. Amplitudes up to +4 dB are permitted without significant clipping.

2. This select is valid provided the sleep mode bit is not set.

3. This control is valid provided the sleep mode bit is not set.

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Philips Semiconductors Preliminary speciﬁcation

BBBBBBBBBBBBBBBBBBBBBBB

BBBBBBBBBBBBBBBBBBBBBBBB

B B B B B B B B B B B B B B B

BBBBBBBBBBBBBBBBBBBBBBBB

YUV picture improvement processor based on histogram modiﬁcation

BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB

TDA9170

Fig.3 Black occurrence detection time constant as a function of C

BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB

The dashed line = 625 lines/frame. The full line = 525 lines/frame.

BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB BBBBBBBBBBBBBBBBBBBBBBB

Fig.4 Response time constant black level loop as a function of C

October 1994 15

TAUBP

TAUBL

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Philips Semiconductors Preliminary speciﬁcation

B B B B B B B B B B B B B B B B

YUV picture improvement processor based on histogram modiﬁcation

(1) Minimum user window. (2) Default window. (3) Maximum user window, window by sandcastle blanking. Rmc=1. W Where: thw= horizontal window width (µs). Nvw= vertical window height (lines). Rmc= effective histogram measuring time within window due to miscount in percentage of thw× Nvw.

eff=thw

× Nvw× Rmc.

TDA9170

Fig.5 Response speed of average histogram amplitude control loop as a function of C

October 1994 16

at 60 Hz field-rate.

TAUHM

Page 17

Philips Semiconductors Preliminary speciﬁcation

B B B B B B B B B B B B B B B B

BBBBBBBBBBBBBBBBBBBBBBBB

YUV picture improvement processor based on histogram modiﬁcation

(1) Minimum user window. (2) Default window. (3) Maximum user window. (4) window by sandcastle blanking. Rmc=1. W

eff=thw

Where: thw= horizontal window width (µs). Nvw= vertical window height (lines). Rmc= effective histogram measuring time within window due to miscount in percentage of thw× Nvw.

BBBBBBBBBBBBBBBBBBBBBBB

× Nvw× Rmc.

TDA9170

Fig.6 Response speed of average histogram amplitude control loop as a function of C

October 1994 17

at 50 Hz field-rate.

TAUHM

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based on histogram modiﬁcation

TDA9170

W Where: thw= horizontal window width (µs). Nvw= vertical window height (lines). Rmc= effective histogram measuring time within window due to miscount in

percentage of t

eff=thw

× Nvw× Rmc.

× Nvw.

Fig.7 Static error on average histogram amplitude (pin TAUHM) as a function of effective histogram measuring

time in a field.

October 1994 18

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Philips Semiconductors Preliminary speciﬁcation

B B B B B B B B B B B B B B B

BBBBBBBBBBBBBBBBBBBBBBBB

BBBBBBBBBBBBBBBBBBBBBBB

YUV picture improvement processor based on histogram modiﬁcation

TDA9170

Fig.8 Adaptive gamma gain setting as a function of ADGAM setting in sleep mode.

Fig.9 Non-linear amplifier non-linearity setting as a function of AMPNLA setting in sleep mode.

October 1994 19

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Philips Semiconductors Preliminary speciﬁcation

B B B B B B B B B B B B B B B

BBBBBBBBBBBBBBBBBBBBBBBB

YUV picture improvement processor based on histogram modiﬁcation

TDA9170

Fig.10 Variable gamma setting as a function of VARGAM setting in sleep mode.

October 1994 20

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based on histogram modiﬁcation

APPLICATION INFORMATION (BUS-MODE)

TDA9170

Fig.11 Application diagram.

October 1994 21

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Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based on histogram modiﬁcation

PACKAGE OUTLINE

10.7

10.2

0.32 max

4.7

max

min

0.18

3.8

max

0.51

10.16

12.2

10.5

MSA270

9.1

TDA9170

8.7

29.4

28.5

3.2

2.8

seating plane

0.53

1.778

1.6

max

(15x)

max

1.3 max

Fig.12 Plastic shrink dual in-line package; 32 leads (400 mil) SDIP32; SOT232-1.

October 1994 22

Dimensions in mm.

Page 23

Philips Semiconductors Preliminary speciﬁcation

YUV picture improvement processor based

TDA9170

on histogram modiﬁcation

SOLDERING Plastic dual in-line packages

Y DIP OR WAVE

B The maximum permissible temperature of the solder is

260 °C; this temperature must not be in contact with the joint for more than 5 s. The total contact time of successive solder waves must not exceed 5 s.

The device may be mounted up to the seating plane, but the temperature of the plastic body must not exceed the specified storage maximum.

DEFINITIONS

Data sheet status

Objective speciﬁcation This data sheet contains target or goal speciﬁcations for product development. Preliminary speciﬁcation This data sheet contains preliminary data; supplementary data may be published later. Product speciﬁcation This data sheet contains ﬁnal product speciﬁcations.

Limiting values

Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the speciﬁcation is not implied. Exposure to limiting values for extended periods may affect device reliability.

If the printed-circuit board has been pre-heated, forced cooling may be necessary immediately after soldering to keep the temperature within the permissible limit.

EPAIRING SOLDERED JOINTS

R Apply a low voltage soldering iron below the seating plane

(or not more than 2 mm above it). If its temperature is below 300 °C, it must not be in contact for more than 10 s; if between 300 and 400 °C, for not more than 5 s.

Application information

Where application information is given, it is advisory and does not form part of the speciﬁcation.

LIFE SUPPORT APPLICATIONS

These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such improper use or sale.

PURCHASE OF PHILIPS I

C COMPONENTS

Purchase of Philips I components in the I2C system provided the system conforms to the I2C specification defined by Philips. This specification can be ordered using the code 9398 393 40011.

C components conveys a license under the Philips’ I2C patent to use the

October 1994 23

Page 24

Philips Semiconductors – a worldwide company

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The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.

Printed in The Netherlands

533061/1500/01/pp24 Date of release: October 1994 Document order number: 9397 740 20011

Philips Semiconductors

Datasheet TDA9170 Datasheet (Philips)

Specifications and Main Features

Frequently Asked Questions

User Manual