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參數(shù)資料
| 型號： | IBM39MPEGCS24DPFA16C |
| 廠商： | IBM Microeletronics |
| 英文描述： | High Performance Audio/Video Decoder(高性能音頻/視頻譯碼器) |
| 中文描述： | 高性能音頻/視頻解碼器（高性能音頻/視頻譯碼器） |
| 文件頁數(shù)： | 5/22頁 |
| 文件大?。?/td> | 278K |
| 代理商： | IBM39MPEGCS24DPFA16C |
IBM39MPEGCS24PFA16C
IBM39MPEGCS24DPFA16C
High Performance Audio/Video Decoder
mpegcs24ds.00
12/10/99 Summary Datasheet
Video Decoder
Page 5 of 21
Video Decoder
The video decoder is compliant with ISO/IEC 13818-2 Main Profile at Main Level and 4:2:2 Profile at Main
Level. European DVB standard is supported.
Horizontal and vertical filters deliver high quality video. Pan and scan are supported with 1/16 pel accuracy.
Error concealment is achieved with a sophisticated transport error support. PTS filtering is programmable.
The internal processor is the central point of control for the video decoder. It interacts with the host processor
through the host interface for high level commands and status. Internally, the video decoder’s processor inter-
acts 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 50 Mbps.
For source material that comes 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 the decoding of the video stream to the STC which is set by the host proces-
sor, by comparing PTS with the STC. If the difference exceeds the tolerance, 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 avail-
able, 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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