Parameter decoding apparatus and parameter decoding method
AssigneePanasonic Corporation
InventorHiroyuki Ehara
Life of this patent
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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.
Claims4
A parameter decoding apparatus that includes a processor connected to a memory, the parameter decoding apparatus comprising:
- 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.
A parameter decoding method comprising:
- 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, and
- wherein at least one of the finding, the producing and the decoding is performed by a processor.
Dependencies are inferred from the claim text.