Continuous backup audio
First Claim
1. A digital audio encoding method, comprising receiving PCM encoded audio information comprising PCM audio data samples, encoding said audio information with a first type of digital audio coding, the encoded audio information having self-contained data units, and encoding said audio information with a second type of digital audio coding, the encoded audio information having self-contained data units, wherein corresponding pairs of self-contained data units encoded with the first type and second type of digital audio coding represent the same PCM audio data samples, such that the first and second audio information represent the same underlying audio information.
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Accused Products
Abstract
A digital audio encoder receives PCM encoded audio information and encodes it with first and second types of digital audio coding, the encoded audio information having self-contained data units, wherein corresponding pairs of self-contained data units encoded with the first type and second type of digital audio coding represent the same underlying audio information. A decoder receives the first and second audio information and an error signal indicating the detection of errors and omissions in the first audio information. The decoder provides a PCM audio output and/or an encoded audio output complying with said first type of digital audio coding based on either the first or second audio information depending on whether there are errors or omissions in the first audio information.
27 Citations
31 Claims
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1. A digital audio encoding method, comprising
receiving PCM encoded audio information comprising PCM audio data samples, encoding said audio information with a first type of digital audio coding, the encoded audio information having self-contained data units, and encoding said audio information with a second type of digital audio coding, the encoded audio information having self-contained data units, wherein corresponding pairs of self-contained data units encoded with the first type and second type of digital audio coding represent the same PCM audio data samples, such that the first and second audio information represent the same underlying audio information.
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7. A digital audio decoding method, comprising
receiving first audio information encoded with a first type of digital audio coding and second audio information encoded with a second type of audio coding, wherein the first audio information and the second audio information each have self-contained data units and corresponding pairs of self-contained data units in the first and second audio information represent the same underlying audio information, receiving an error signal indicating errors and omissions in the first audio information or detecting errors and omissions in the first audio information, and providing a PCM audio output and/or an encoded audio output complying with said first type of digital audio coding, wherein a PCM audio output is provided by decoding the first audio information when no error or omission is detected in the first audio information and by decoding the second audio information instead of the first audio information when an error or omission is detected in the first audio information, and/or an encoded audio output complying with said first type of digital audio coding is derived from the first audio information when no error or omission is detected in the first audio information and by transcoding the second audio information when an error or omission is detected in the first audio information.
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26. An apparatus for encoding digital audio, comprising
an audio encoder configured to: -
receive PCM encoded audio information comprising PCM audio data samples, encode said audio information with a first type of digital audio coding, the encoded audio information having self-contained data units, and encode said audio information with a second type of digital audio coding, the encoded audio information having self-contained data units, wherein corresponding pairs of self-contained data units encoded with the first type and second type of digital audio coding represent the same PCM audio data samples, such that the first and second audio information represent the same underlying audio information.
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27. An apparatus for decoding digital audio, comprising
an audio decoder configured to: -
receive first audio information encoded with a first type of digital audio coding and second audio information encoded with a second type of audio coding, wherein the first audio information and the second audio information each have self-contained data units and corresponding pairs of self-contained data units in the first and second audio information represent the same underlying audio information, receiving an error signal indicating errors and omissions in the first audio information or detecting errors and omissions in the first audio information, and provide a PCM audio output and/or an encoded audio output complying with said first type of digital audio coding, wherein a PCM audio output is provided by decoding the first audio information when no error or omission is detected in the first audio information and by decoding the second audio information instead of the first audio information when an error or omission is detected in the first audio information, and/or an encoded audio output complying with said first type of digital audio coding is derived from the first audio information when no error or omission is detected in the first audio information and by transcoding the second audio information when an error or omission is detected in the first audio information.
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28. A digital audio encoder, comprising
means for receiving PCM encoded audio information comprising PCM audio data samples, means for encoding said audio information with a first type of digital audio coding, the encoded audio information having self-contained data units, and means for encoding said audio information with a second type of digital audio coding, the encoded audio information having self-contained data units, wherein corresponding pairs of self-contained data units encoded with the first type and second type of digital audio coding represent the same PCM audio data samples, such that the first and second audio information represent the same underlying audio information.
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29. A digital audio decoder, comprising
means for receiving first audio information encoded with a first type of digital audio coding and second audio information encoded with a second type of audio coding, wherein the first audio information and the second audio information each have self-contained data units and corresponding pairs of self-contained data units in the first and second audio information represent the same underlying audio information, means for receiving an error signal indicating errors and omissions in the first audio information or for detecting errors and omissions in the first audio information, and means for providing a PCM audio output and/or an encoded audio output complying with said first type of digital audio coding, wherein a PCM audio output is provided by decoding the first audio information when no error or omission is detected in the first audio information and by decoding the second audio information instead of the first audio information when an error or omission is detected in the first audio information, and/or an encoded audio output complying with said first type of digital audio coding is derived from the first audio information when no error or omission is detected in the first audio information and by transcoding the second audio information when an error or omission is detected in the first audio information.
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30. A machine-readable medium, having encoded thereon program code, wherein, when the program code is executed by a machine, the machine implements a digital audio decoding method, comprising
receiving first audio information encoded with a first type of digital audio coding and second audio information encoded with a second type of audio coding, wherein the first audio information and the second audio information each have self-contained data units and corresponding pairs of self-contained data units in the first and second audio information represent the same underlying audio information, receiving an error signal indicating errors and omissions in the first audio information or detecting errors and omissions in the first audio information, and providing a PCM audio output and/or an encoded audio output complying with said first type of digital audio coding, wherein a PCM audio output is provided by decoding the first audio information when no error or omission is detected in the first audio information and by decoding the second audio information instead of the first audio information when an error or omission is detected in the first audio information, and/or an encoded audio output complying with said first type of digital audio coding is derived from the first audio information when no error or omission is detected in the first audio information and by transcoding the second audio information when an error or omission is detected in the first audio information.
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31. A digital audio encoding and decoding method, comprising
receiving PCM encoded audio information comprising PCM audio data samples, encoding said audio information with a first type of digital audio coding, the encoded audio information having self-contained data units, encoding said audio information with a second type of digital audio coding, the encoded audio information having self-contained data units, wherein corresponding pairs of self-contained data units encoded with the first type and second type of digital audio coding represent the same PCM audio data samples, such that the first and second audio information represent the same underlying audio information, receiving the audio information encoded with said first type of digital audio coding and the audio information encoded with a second type of audio coding, receiving an error signal indicating errors and omissions in the first audio information or detecting errors and omissions in the first audio information, and providing a PCM audio output and/or an encoded audio output complying with said first type of digital audio coding, wherein a PCM audio output is provided by decoding the first audio information when no error or omission is detected in the first audio information and by decoding the second audio information instead of the first audio information when an error or omission is detected in the first audio information, and/or an encoded audio output complying with said first type of digital audio coding is derived from the first audio information when no error or omission is detected in the first audio information and by transcoding the second audio information when an error or omission is detected in the first audio information.
Specification