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DDR MEEORY
The unit adopts 2 chips 16M*16bit DDR SGRAM of 200M speed, 32-bit of data and 12 bit of
address.
FLASH and EEPROM
1M*16-bit of FLASH and 64K bit of EEPROM
10. DAP module (include AVC, SRS, TONE CONTROL, EQ ect,.)
DVB-T module
11.
turner
crystal
Working principle of DVB-T module:
RF signal from cable net received by the tuner is turned into IF signal, via A/D conversion to digital
baseband signal, then it is sent to internal channel decoder COFDM decode, output MPEG-2
multi-media program transmission data (TS stream), the TS stream from TUNER is sent to
ZR3915X demultiplexer, demultiplexer draws up a packaged program base stream from MPEG-2
transport stream(PES), contains video PES, audio PES and assistant data PES. Demultiplexer
contains noninterference engine, which can release interference data of transport layer and PES
layer, the output of demultiplexer is noninterference audio/video PES.
Video PES is sent to ZR3915X demultiplexer, then output MPEG-2 video data, after decode, the
data is sent to PAL/NTSC coder D/A converting into video signal CVBS, Y/C, R/G/B or Y/Cr/Cb,
output from video output circuit.
Audio PES is sent to audio decoder, then output MPEG-2 audio data to decode, it has two kinds of
output interface: PCM output and SPDIF output. PCM output interface is made up of MCLK, LRCLK,
BCLK and AOUT, the output PCM signal needs to D/A conversion. The DAC function is completed
by CS4334.
ZR3915X digital TV decoder
Transport stream demultiplexer and MPEG-2 decoder: transport stream commonly contains
some audio/video streams and data information. Transport stream demultiplexer is used to
distinguish different programs, distils corresponding audio/video streams and data stream
output
Audio output
hardware
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