Samsung DVD-R120/AXAX Instrucciones De Servicio página 189

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Circuit Operating Descriptions
13-4-3 NTSC/PAL Video Decoder (TW9906 : Video Decoder)
The VU1 (Video Decoder : TW9906) device is a high quality, single-chip digital video decoder that digitizes and
decodes all popular baseband analog video formats into digital component video. The VU1 (Video Decoder :
TW9906) supports the analog-to-digital (A/D) conversion of component RGB and YPbPr signals, as well as the
A/D conversion and decoding of NTSC, PAL and SECAM composite and S-video into component YCbCr.
This VU1 (Video Decoder : TW9906) includes four 10-bit 30-MSPS A/D converters. and A/D conversion of 10bit
analog Video signal converted into Digital Video signal (ITU-R656 Format) is outputted via
U1 (MPEG2 Decoder & Encoder with video Encoder) of digital part.
The following output formats supply 10-bit 4:2:2 YCbCr to the U1 (MPEG2 Decoder & Encoder with video
Encoder) of digital part.
On CVBS and S-video inputs, the user can control video characteristics such as contrast, Brightness, saturation,
and hue via an I2C U1 port [PIN V17, V18] interface.
The TW9906 decoder includes methods for advanced vertical blanking interval (VBI) data retrieval. The VBI data
processor (VDP) slices, parses, and performs error checking on teletext, closed caption (CC), Copy Guard Detect
Processing and other VBI data.
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