Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Reexamination Certificate
2006-10-13
2011-11-29
Albertalli, Brian (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
C704S227000, C704S501000
Reexamination Certificate
active
08069035
ABSTRACT:
A scalable encoding apparatus capable of suppressing the quality degradation of a decoded signal without increasing the bit rate. In this apparatus, a core layer encoding part (101) and an extended layer encoding part (102) encode an input signal for each of audio frames. When a replacement determining part (103) determines that a degree to which the input signal changes between a preceding frame and a current frame is equal to or greater than a predetermined value or that a degree, to which the quality of the decoded signal is improved by an extended layer encoding process in the preceding frame, is equal to less than a predetermined level, a replacing part (105) replaces a part of an extended layer encoded data of the preceding frame by a core layer encoded data of the current frame. That is, a transmitting part (108) transmits, as a backup, the core layer encoded data of the current frame to a decoding end in advance.
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Search report from E.P.O., mail date is Feb. 10, 2011.
ISO/IEC 14496-3: 2001 (E) Prt-3 Audio (MPEG-4) Subpart-3 Speech Coding (CELP).
ISO/IEC 14496-3: 2001 (E) Prt-3 Audio (MPEG-4) Subpart-1 Main Annex1 .B (Informative) Error Protection tool.
Albertalli Brian
Greenblum & Bernstein P.L.C.
Panasonic Corporation
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