Method and apparatus for adaptive multi rate codec
AssigneeTELEFONAKTIEBOLAGET L M ERICSSION (publ)
InventorsStefan BRUHN, Jingming Kuang, Jing Wang, Chunling Zhang, Shenghui Zhao
Life of this patent
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Abstract
There is provided an apparatus and method for encoding a speech signal. The encoding comprises: receiving a plurality of current samples of the speech signals; extrapolating a plurality of look-ahead samples from the current samples; and performing linear prediction analysis using the current samples and the extrapolated look-ahead samples.
Claims22
A method of encoding a speech signal, the method comprising:
- receiving a plurality of current samples of the speech signals;
- extrapolating a plurality of look-ahead samples from the current samples;
- and
- performing linear prediction analysis using the current samples and the extrapolated look-ahead samples.
A method of encoding a speech signal, the method comprising using look-ahead values for linear prediction analysis, the method characterized in that the look-ahead samples are extrapolated from current samples.
An apparatus for encoding a speech signal, the apparatus comprising:
- a receiver arranged to receive a plurality of current samples of the speech signal;
- an extrapolator arranged to extrapolate a plurality of look-ahead samples from the current samples;
- and
- an encoder arranged to perform linear prediction analysis using the current samples and the extrapolated look-ahead samples.
An apparatus for encoding a speech signal, the apparatus comprising a processor arranged to use look-ahead values for linear prediction analysis, the apparatus characterized in that the processor is further arranged to extrapolate the look-ahead samples are extrapolated from a plurality of current samples.
Dependencies are inferred from the claim text.