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9. Circuit Descriptions, Abbreviations List and IC Data Sheets
9. Circuit Descriptions, Abbreviations List and IC Data Sheets
Index of this chapter
9.1 Circuit Descriptions
9.2 Abbreviations List
9.3 IC Data Sheets
9.1 Circuit Descriptions
This is a new TV chasis, specifically developed for NTSC/ATSC/QAM reception.The key components are :
MT537x:DTV backend decoder and TV controller(MT5371 for WXGA&MT5373 for full HD).
MT5112BD: Channel Decoder
WM8776S:Stereo Audio Codec
Chassis Function Description
Terrestrial Reception
The TV receives multimedia information by tuning to one of many 6 MHz input channels available via a terrestrial
connection(Including NTSC & ATSC).
When the input channel is an analog channel, the signal is processed via the NTSC decoder and the VBI data decoder.
If the input channel is a digital channel, the signal is processed via the channel decoder and DTV backend decoder.
Cable Reception
The TV receives multimedia information by tuning to one of many 6 MHz input channels available via a cable
connection(NTSC & Free QAM). When the input channel is a digital channel, it is processed via the QAM demodulator.
Signal Processing
The key part in the system, the MT537x, performs almost all key features, like video quality enhancement , smooth picture
quality for motion deinterlacer, and others. The special color processing technology provided favorite and natural
color for TV. It is a highly integrated SOC IC with an ARM microcontroller core. MT537x support transport de-multiplexer,
MPEG-2 video decoder, AC3 audio decoder, LVDS transmitter, TV decoder and HDMI Receiver. It is also integrated with
high speed VGA ADC, high resolution Video/Audio ADC, 90db Audio DAC and 12-bit Video DAC. It will provide very fine
quality for TV.
The audio processing is processed in WM8776S. It is a high performance, stereo audio codec with 6 channel input
selector and is ideal for surround sound processing. It supports fully independent sample for ADC and DAC. Its audio data
interface supports I
2
S and DSP formats.
Summary of Contents for 19PFL5402D/27
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