PARAMETER DECODING APPARATUS AND PARAMETER DECODING METHOD
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Abstract
A parameter decoding apparatus includes a prediction residue decoder that finds a quantized prediction residue based on encoded information included in a current frame subject to decoding and a moving-average predictor produces a predicted parameter by multiplying a predictive coefficient with a past quantized prediction residue. An adder decodes a parameter by adding the quantized prediction residue and the predicted parameter, wherein the prediction residue decoder, when the current frame is erased, finds a current-frame quantized prediction residue from a weighted linear sum of a parameter decoded in the past and a future-frame quantized prediction residue.
23 Citations
10 Claims
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1-7. -7. (canceled)
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8. A parameter decoding apparatus comprising:
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a prediction residue decoder that finds a quantized prediction residue based on encoded information included in a current frame subject to decoding, a moving-average predictor that produces a predicted parameter by multiplying a predictive coefficient with a past quantized prediction residue; and an adder that decodes a parameter by adding said quantized prediction residue and said predicted parameter, wherein said prediction residue decoder, when said current frame is erased, finds a current-frame quantized prediction residue from a weighted linear sum of a parameter decoded in the past and a future-frame quantized prediction residue.
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10. A parameter decoding method comprising:
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finding a quantized prediction residue based on encoding information included in a current frame subject to decoding, producing a predicted parameter by multiplying a predictive coefficient with a past quantized prediction residue; and decoding a parameter by adding said quantized prediction residue and said predicted parameter, wherein, in the finding, when said current frame is erased, a current-frame quantized prediction residue is found from a weighted linear sum of a parameter decoded in the past and a future-frame quantized prediction residue.
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Specification