Scalable stereo audio coding/decoding method and apparatus
First Claim
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1. A scalable stereo audio coding method comprising:
- transforming a first channel and a second channel audio samples;
quantizing the transformed first channel and the second channel audio samples; and
coding only the channel audio samples of one of the quantized first channel audio samples and the quantized second channel audio samples as a mono signal commencing at a base layer and continuing up to a predetermined transition layer having a layer index greater than one and then interleavingly coding the quantized first and second channel audio samples as a stereo signal by increasing a layer index from a layer succeeding the transition layer, until coding for a predetermined plurality of layers is finished.
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Abstract
Scalable stereo audio coding and decoding method and apparatus are provided. The scalable stereo audio coding method includes transforming a first channel and a second channel audio samples; quantizing the transformed first channel and a second channel audio samples; and coding the quantized first channel audio samples up to a predetermined transition layer and then interleavingly coding the quantized first and second channel audio samples with increasing a layer index from a layer succeeding the transition layer, until coding for a predetermined plurality of layers is finished.
15 Citations
22 Claims
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1. A scalable stereo audio coding method comprising:
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transforming a first channel and a second channel audio samples; quantizing the transformed first channel and the second channel audio samples; and coding only the channel audio samples of one of the quantized first channel audio samples and the quantized second channel audio samples as a mono signal commencing at a base layer and continuing up to a predetermined transition layer having a layer index greater than one and then interleavingly coding the quantized first and second channel audio samples as a stereo signal by increasing a layer index from a layer succeeding the transition layer, until coding for a predetermined plurality of layers is finished. - View Dependent Claims (2, 3, 4, 5, 21)
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6. A scalable stereo audio coding apparatus comprising:
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a computer; a psychoacoustic unit providing information on a psychoacoustic model; a transformation unit transforming a first channel and a second channel audio samples based on the information on a psychoacoustic model; a quantizer quantizing the transformed first channel and a second channel audio samples; and a bit packing unit coding only the channel audio samples of one of the quantized first channel audio samples and the quantized second channel audio samples as a mono signal commencing at a base layer and continuing up to a predetermined transition layer having a layer index greater than one and then interleavingly coding the quantized first and second channel audio samples as a stereo signal by increasing a layer index from a layer succeeding the transition layer, until coding for a predetermined plurality of layers is finished. - View Dependent Claims (7, 8, 9, 10)
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11. A scalable stereo audio decoding method comprising:
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decoding only the channel audio samples of one of a first channel audio samples and second channel audio samples as a mono signal from a base layer up to a predetermined transition layer having a layer index greater than one and then interleavingly decoding the first and a second channel audio samples as a stereo signal by increasing a layer index from a layer succeeding the transition layer, until decoding for a predetermined plurality of layers is finished and obtaining quantized samples of the first and the second channels; dequantizing the quantized samples of the first and the second channels; and inverse transforming the dequantized samples of the first and the second channels to obtain first and the second channel audio samples. - View Dependent Claims (12, 13, 14, 15, 16, 22)
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17. A scalable stereo audio decoding apparatus comprising:
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a computer; a bit unpacking unit decoding only the channel audio samples of one of a first channel audio samples and a second channel audio samples as a mono signal from a base layer up to a predetermined transition layer having a layer index greater than one and then interleavingly decoding the first and a second channel audio samples as a stereo signal by increasing a layer index from a layer succeeding the transition layer, until decoding for a predetermined plurality of layers is finished and obtaining quantized samples of the first and the second channels; dequantizer dequantizing the quantized samples of the first and the second channels; and inverse transformer inverse transforming the dequantized samples of the first and the second channels to obtain first and the second channel audio samples. - View Dependent Claims (18, 19, 20)
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Specification