Device and method for coding audio/video signal
US6373896B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1999 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | May 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Device and method for coding an audio/video signal, in which a sampling rate is shifted according to a variance of a received data during data sampling operation for improving a coding efficiency, the device including a first sample/hold unit for sampling/holding an analog video signal at a first sampling rate in response to a sampling control signal, a phase shifter for shifting a phase of the sampling control signal according to a variance of the video signal, a second sampling/hold unit for sampling/holding an analog video signal at a second sampling rate in response to the sampling control signal shifted by the phase shifter, a summer for summing the sampling data from the first sample/hold unit and the sampling data from the second sample/hold unit, a comparator for comparing the sampling data summed at the summer to an arbitrarily set critical value, a switching unit for selectively providing the sampling data either from the first sample/hold unit or from the second sample/hold unit in response to a signal from the comparator, a quantizing unit for quantizing the sampling data selectively provided by the switching unit, and an encoding block for compressing a data from the q…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.