Multi-standard audio player

Details Multi-standard audio player Multi-standard audio player

2005-09-20

2005-09-20

JeanPierre, Peguy (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

C700S094000

Reexamination Certificate

active

06946982

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.

REFERENCES:
patent: 6782239 (2004-08-01), Johnson et al.
patent: 6844834 (2005-01-01), Maruya et al.
patent: 2003/0210617 (2003-11-01), Millikan et al.
patent: 2005/0080743 (2005-04-01), Ostrover et al.
Texas Instruments, Inc., “Streaming Media.” P 1-6, 2003, no month.
Micronas Semiconductor Holding AG, “Preliminary Data Sheet, MAS 3587F MPEG Layer 3 Audio Encoder/Decoder,” Edition Nov. 7, 2001.

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