Video decoder
US5576765A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1994 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Mar 17, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital signal decoder system for receiving compressed encoded digitized video signals and transmitting decompressed decoded digital video signals includes a FIFO Data Buffer, a RAM having (1) a compressed, encoded Data Buffer and (2) a data portion for storing decompressed digital video buffer data. A Memory Management Unit is provided for managing the RAM. The decoder has a decoder processor that includes a Variable Length Code Decoder for receiving encoded data, a (2,3,3) parallel counter based Inverse Quantizer for dequantizing the decoded data, an Inverse Discrete Cosine Transform Decoder for transforming the dequantized, decoded data into Intrapictures, Predicted Pictures, and Bidirectional predicted Pictures, a Motion Compensator for receiving Intrapictures and other information from the RAM, and error functions, and forming motion compensated predicted pictures therefrom for return to the RAM, a Display Unit to output motion compensated pictures from the RAM, and a reduced instruction set Controller to control the Memory Management Unit, the Variable Length Code Decoder, the Inverse Quantizer, the Inverse Discrete Cosine Transform Decoder, the Motion Compensator, and the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.