Scalable Coding with Partial Eror Protection
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Abstract
An encoder for encoding an audio signal, wherein the encoder comprises: a first encoder configured to receive an first signal and generate a second signal dependent on the first signal; a second encoder configured to generate a third signal dependent on the second signal and the first signal; a signal processor configured to partition the third signal into at least two parts; and a multiplexer configured to receive the at least two parts of the third signal and the second signal and combine the said signals to output an encoded signal.
36 Citations
94 Claims
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1-66. -66. (canceled)
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67. A method comprising:
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receiving an first signal generating a second signal based on the first signal; generating an encoded residual signal based on the second signal and the first signal, wherein the encoded residual signal comprises at least one time varying filter excitation vector index associated with a time varying filter excitation vector from a time varying filter excitation stage; partitioning the encoded residual signal into at least two parts by dividing the at least one time varying filter excitation vector into at least two excitation vector sub indices, wherein each of said at least two excitation vector sub indices are associated with one set of excitation vector components, wherein the at least one time varying filter excitation vector comprises at least two sets of excitation vector components, and wherein the partitioned encoded residual signal comprises the at least two excitation vector sub-indices; and combining at least one part of the encoded residual signal and the second signal to output an encoded signal. - View Dependent Claims (68, 69, 70, 71, 72, 73, 74, 75)
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76. An apparatus comprising
at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor cause the apparatus at least to: -
receive an first signal; generate a second signal based on the first signal; generate an encoded residual signal based on the second signal and the first signal, wherein the encoded residual signal comprises at least one time varying filter excitation vector index associated with a time varying filter excitation vector from a time varying filter excitation stage; partition the encoded residual signal into at least two parts by dividing the at least one time varying filter excitation vector into at least two excitation vector sub indices, wherein each of said at least two excitation vector sub indices are associated with one set of excitation vector components, wherein the at least one time varying filter excitation vector comprises at least two sets of excitation vector components, and wherein the partitioned encoded residual signal comprises the at least two excitation vector sub-indices; and combine at least one part of the encoded residual signal and the second signal to output an encoded signal. - View Dependent Claims (77, 78, 79, 80, 81, 82, 83, 84)
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85. A method comprising:
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receiving an encoded signal; partitioning the encoded signal to generate at least a first part and a second part of the encoded signal, wherein the second part of the encoded signal comprises at least a first portion and a second portion; and generating a combined second part signal dependent at least on the first portion of the second part of the encoded signal. - View Dependent Claims (86, 87, 88, 89)
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90. An apparatus comprising
at least one processor and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the at least one processor cause the apparatus at least to: -
receive an encoded signal; partition the encoded signal to generate at least a first part and a second part of the encoded signal, wherein the second part of the encoded signal comprises at least a first portion and a second portion; and generate a combined second part signal dependent at least on the first portion of the second part of the encoded signal. - View Dependent Claims (91, 92, 93, 94)
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Specification