Variable rate encoding and communicating apparatus

Details Variable rate encoding and communicating apparatus Variable rate encoding and communicating apparatus

H - Electricity

03

M

354/67

H03M 7/40 (2006.01) H04B 1/66 (2006.01)

Patent

CA 2032765

In a transmitter in the present invention, an input signal is input to a QMF (QUADRATURE MIRROR FILTER) bank 102 where the input signal is divided to a plurality of frequency bands to form corresponding band signals. A distributed bit calculating unit 109 calculates respective bit rates with which the corresponding band signals are encoded on the respective power values of the band signals. Quantizers 104-1, 104- 2, ..., 104-n encode the respective band signals at the corresponding bit rates and input the resulting correspond- ing band codes to a cellulating unit 111 which incorporates the respective band codes into a cell as an information unit and sends the cell. In a receiver, a cell is decomposed to obtain the respective band codes, which are then dequantized to form the corresponding band signals. These band signals are synthesized to form a signal for the entire band, and the signal for the entire band is output as a decoded sig- nal.

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