Multi-standard audio player
US6946982B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2004 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Jul 27, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H20/95
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
For a portable video player to encode MP3 audio, a first digital signal processor (DSP) encodes digital signals from an analog/digital (A/D) converter into MP3 data, and a controller reads the MP3 data into a nonvolatile memory. To decode MP3 or MP2 audio, the controller reads MP3/2 data from the nonvolatile memory into the first DSP, and the first DSP decodes the MP3/2 data into digital signals that are provided to a digital/analog (D/A) converter.For the portable video player to encode a different type of audio, the first DSP is bypassed and a second DSP encodes digital signals from the A/D converter into audio data and writes the audio data into the nonvolatile memory. To decode this different type of audio, the first DSP is bypassed and the second DSP decodes audio data from the nonvolatile memory into digital signals that are provided to the D/A converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.