Data rate control for variable rate compression systems
US6023233A · kind A · utility
Inventors
Key dates
| Filing date | Mar 20, 1998 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Mar 20, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encoder for a data compression system comprises a core encoder and a FIFO buffer. The FIFO buffer is able to absorb short bursts of high data rate and deliver the data to a transmission medium at a rate that it can handle. A corresponding decoder includes a FIFO buffer which receives data at a rate not exceeding the maximum that the transmission medium can deliver, but delivers data to a core encoder at a rate which can, for short periods, greatly exceed the rate from a transmission medium. With consumer media such as CD and DVD, the decoder cost is paramount so it is important to minimize the size of buffer memory required. Another consideration is the delay caused by the buffering since it is important to the latency between the user selecting a track or index point and hearing the decoded audio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.