Method and apparatus for dual output interface control of audio decoder
US6061655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Jun 26, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10527
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio decoder is described that can concurrently produce two synchronized outputs of a digital audio stream at different sampling rates and can provide for seamless switching between the rates. In one embodiment, the audio decoder includes a first output buffer, an arithmetic logic unit (ALU), a second output buffer, and a control module. The first audio buffer is configured to buffer a sequence of digital audio samples and to provide the first sequence of digital audio samples to an output device at 96 kHz. The arithmetic logic unit (ALU) is coupled to the first output buffer to retrieve the first sequence of digital audio samples and to convert the first sequence of digital audio samples into a decimated sequence of digital audio samples. The second output buffer is coupled to the ALU to buffer the decimated sequence of digital audio and to provide the decimated sequence of digital audio samples to a second output device at 48 kHz. The control module receives a sample request signal at 96 kHz and responsively provides first and second address signals to the first and second output buffers, respectively, to indicate which digital audio samples are next provided to the output de…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.