ViewSonic N3735w-2M Service Manual page 33

MT538x is also including a fully HDMI-compliant receiver that fits directly into home theater
products such as LCD TVs, plasma TVs and HDTVs. The receiver is capable of supporting
bandwidths up to 150 MHz and video resolutions up to 1080p and WXGA.
The built-in High-bandwidth Digital Content Protection (HDCP) decryption engine secures the
digital link for transmission of valuable high-definition video and audio. Built-in HDCP
self-test engine simplifies manufacturing testing.
HDMI Transmitter will pull high HDMI_PLUG_POWER (pin 18 in connector) when the cable
is connected. LCD Controller will pull high HDMI_HPD (pin 19 in connector) to info the
HDMI transmitter that the receiver is ready. The HDMI transmitter sends the video & audio to
MT538x via 3 Data TMDS pairs & 1 CLOCK TMDS pairs.
D. Audio
When the Antenna receive the analog TV signal and modulate it to the CVBS signal which can
be recognized by the video decoder and SIF audio signal output to the sound decoder in the
MT538x.
When the Antenna receive the digital TV signal, RF signal will be converted to IF signals and
the IF signals will be modulated to the transport bitstream by MT538x. The MT538x receives
bitstream input in TS format, and then separates the TS into audio and video PES, analyzing the
PES header, and transferring the PES to the audio and video decoders.
The MT8292 is a highly integrated stereo audio CODEC. The MT8292 performs stereo
analog-to-digital and two digital-to-analog conversions with single-ended analog voltage input
and output. It's up to 24-bit serial values at sample rates up to 192 kHz. A 7:1 stereo input
multiplexer and an automatic level control are included.
The three analog audio sources are put into MT8292 which first select the sources and do the
stereo analog-to-digital conversion with single-ended analog voltage input Sampled data is
transmitted through the serial audio interface at various rates from 32 kHz to 192 kHz.
The serial audio signals that coming from MT8292 are put into MT538x for DSP and audio
effect processing. The serial audio signals output from MT538x go into the MT8292 for doing
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N3735w-2M