2.2. WORKING PRINCIPLE
The DEN 8000 encoder structure is as per above picture, which consists of AV A/C process
unit, AV encoding unit, TS process unit, data output unit and CPU.
2.2.1 VIDEO AUDIO A/D PROCESS
AV A/D process unit converts analog audio & video input into digital format and send it to
encoding chipset. Video port supports ordinary signal source in broadcasting and various
standard video &audio signal ports, including analog CVBS input and mono, stereo audio
input. PAL/NTSC are both acceptable in this device.
2.2.2. A V ENCODING
AV encoding adopts MPEG-2 real-time encoding chipset, encoding the digital AV signal as
MPEG-2 format. The video encoding process is according to MPEG-2 main profile (MP@ML),
max bit rate is 15Mbps.The audio encoding process is done by professional audio encoding
software according to MPEG-2 layer I and layer II.
2.2.3. A V TS PROCESS
A V TS multiplexing includes the 4 routes ES to MPTS process. All data are MPEG-2
compliance.
2.2.4. DATA OUTPUT PORT
The output TS is compliant with DVB ASI.
3. SPECIFICATIONS
3.1. APPLICATION
The DEN 8000 encoder transforms the 4 input analogue A/V sources into a single DVB-ASI
digital stream.
3.2. CHARACTERISTICS
> Multiplexer function for up to 4 analogue A/V sources (PAL, NTSC).
> MPEG-2 MP@ML output video encoding, bit rate 1-15Mbps.
> MPEG-1 Layer 1, Layer 2 audio encoding.