Encoding device, decoding device, and system thereof utilizing band expansion information
First Claim
1. A decoding device for decoding an encoded signal made up of a first bit stream which is an encoded sound digital signal and of a second bit stream which includes encoded band expansion information used for expanding a reproduction band of the sound digital signal, the decoding device comprising:
- a separating unit operable to separate the first bit stream and the second bit stream from the encoded signal; and
a first reproducing unit operable to reproduce a first sound digital signal from the separated first bit stream,wherein size information indicating a size of codes of the band expansion information is multiplexed into the second bit stream, andwherein the separating unit is operable to separate the second bit stream from the encoded signal according to the size information included in the second bit stream.
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Accused Products
Abstract
A decoding device (30a) comprises a narrow-band decoding unit (31) operable to reproduce a PCM signal (P1) from a narrow-band bit stream included in a wide-band bit stream (S0), a wide-band decoding unit (32) operable to reproduce a PCM signal (P2) having a frequency band which is wider than that of the PCM signal (P1) reproduced by the narrow-band decoding unit (31) from the narrow-band bit stream and a band expanding bit stream included in the wide band bit stream (S0) and a selecting unit (34) operable to select either the PCM signal (P1) reproduced by the narrow-band decoding unit (31) or the PCM signal (P2) reproduced by the wide-band decoding unit (32), and to output the selected sound digital signal.
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Citations
21 Claims
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1. A decoding device for decoding an encoded signal made up of a first bit stream which is an encoded sound digital signal and of a second bit stream which includes encoded band expansion information used for expanding a reproduction band of the sound digital signal, the decoding device comprising:
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a separating unit operable to separate the first bit stream and the second bit stream from the encoded signal; and a first reproducing unit operable to reproduce a first sound digital signal from the separated first bit stream, wherein size information indicating a size of codes of the band expansion information is multiplexed into the second bit stream, and wherein the separating unit is operable to separate the second bit stream from the encoded signal according to the size information included in the second bit stream. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification