Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1996-10-21
1999-03-30
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704205, 704500, G10L 704
Patent
active
058901124
ABSTRACT:
An audio coding device which includes an analyzing unit for conducting frequency analyses of an input audio signal, a bit weighting unit for generating a weight signal based on an analysis signal, and a filter for converting an input audio signal into a plurality of frequency band signals. The audio coding device also has a bit allocating unit for generating quantization data from a frequency band signal based on a value of a weight signal, and a frame packing unit for generating compression data from quantization data and outputting the compression data. A frame completion determining unit determines whether weight allocation processing is normally completed or not, and a storage unit stores the last weight signal recognized as having weight allocation processing normally completed. Further, a switching unit supplies the bit allocating unit with a weight signal stored in the storage unit in place of a weight signal generated by the bit weighting unit according to the determination results of the frame completion determining unit.
REFERENCES:
patent: 5649029 (1997-07-01), Galbi
Peter Noll, "MPEG Digital Audio Coding," IEEE Signal Processing Magazine, p. 59-81, Sep. 1997.
Brian Bryden, Gerald E. Seguin, Jean Conan, Vijay K. Vhargava, and Andre Brind'Amour, "Error Correction/Masking for Digital Voice Transmission Over the Land Mobile Satellite System,"IEEE Trans. Communications, vol. 37, No. 3, pp. 309-314, Mar. 1989.
Detlef Wiese, Optimization of Error Detection anf Concealment for ISO/MPEG/AUDIO CODECs Layer-I and II, 93rd Audio Engineering Convention preprint 3368 (D-5), Oct. 1992.
Karl-Heinz Brandenburg and Gerhard Stoll, "ISO-MPEG-1 Audio: A Generic Standard for Coding of High-Quality Digital Audio," J. Audio Engineering Society, vol. 42, No. 10, pp. 780-792, Oct. 1994.
Information Technology--Coding of Moving Pictures And Associated Audio For Digital Storage Media At Up to About 1,5 Mbit/s--, ISO/IEC (Aug. 1, 1993), pp. 30-32.
Hudspeth David R.
NEC Corporation
Smits Talivaldis Ivars
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