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參數(shù)資料
| 型號： | IBM39STB130x0 |
| 廠商： | IBM Microeletronics |
| 英文描述： | STB130x0 A/V Transport/Decoders(STB130x0 音頻/視頻的傳送譯碼器) |
| 中文描述： | STB130x0的A / V運輸/解碼器（STB130x0音頻/視頻的傳送譯碼器） |
| 文件頁數(shù)： | 7/22頁 |
| 文件大?。?/td> | 211K |
| 代理商： | IBM39STB130X0 |
IBM39STB130x0
STB130x0 A/V Transport/Decoders
STB130x0_sds_080900.fm.05
Sept. 7, 2000
Architecture and Subsystem Information
Page 7 of 22
Video Decoder
The video decoder is compliant with ISO/IEC 13818-2 Main Profile at Main Level, and the European DVB
standard is also supported.
Horizontal and vertical filters deliver high quality video. Pan and scan are supported with 1/16 pel accuracy,
and PTS filtering is programmable. A sophisticated transport mechanism supports error concealment.
The internal processor is the central point of control for the video decoder. It interacts with the host processor
through the host interface to process high level commands and report status changes. Internally, the video
decoder’s processor interacts with a Huffman decoder (Variable Length Code Decoder (VLCD)), Inverse
Quantizer, Inverse Discrete Cosine Transform (IDCT) Unit, and a Motion Compensation Unit.
Video Input
Elementary Streams (ES) and Packetized Elementary Streams (PES) are decoded at speeds up to 15 Mbps
sustained data rate.
For source material derived from film, frame rate conversion using 3:2 pulldown is supported. The MPEG-2
Pan Scan feature is supported which allows conversion of 16:9 aspect ratio images to conventional 4:3
aspect ratio displays.
The host data bus is used to input compressed audio and video data when a transport stream is not used.
Synchronization
The video decoder synchronizes video stream decoding to the STC, which is set by the host processor. The
decoder compares PTS with the STC and, if the difference exceeds tolerance settings, the current decoded
picture will either be repeated or the next B-frame will be skipped to recover synchronization. If a B-frame is
not available, synchronization is accomplished by skipping a P-frame.
Supported Input Image Sizes
Size
Aspect Ratio
Format
352 x 240 (288)
4:3
NTSC(PAL)
352 x 480 (576)
4:3
NTSC(PAL)
480 x 480 (576)
4:3
NTSC(PAL)
544 x 480 (576)
4:3
NTSC(PAL)
720 x 480 (576)
16:9
pan and scan in NTSC(PAL)
544 x 480 (576)
16:9
pan and scan in NTSC(PAL)
480 x480 (576)
16:9
pan and scan in NTSC(PAL)
352 x 240 (288)
16:9
pan and scan in NTSC(PAL)
352 x 480 (576)
16:9
pan and scan in NTSC(PAL)
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