Code rate adaptive encoding/decoding arrangement and method for a pulse code modulation system
AssigneeElan Microelectronics Corporation
InventorWei-Fan Lu
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Abstract
A code rate adaptive encoding/decoding arrangement and method for a pulse code modulation system comprises a code rate adaptor and a code capacity meter to dynamically produce a code rate adaptive signal for the code length of the pulse code modulation adaptive to actual situations during the encoding/decoding process.
Claims54
A code rate adaptive encoding arrangement for a pulse code modulation system comprising a quantizer for quantizing a prediction error derived from an input subtracting a prediction to produce a quantized prediction error, a predictor for producing said prediction based on a quantized input derived from a summation of said prediction and quantized prediction error, and an encoder for encoding said quantized prediction error to produce a code signal, characterized in that a code rate adaptor is further included for producing a code rate adaptive signal based on said prediction to regulate said quantizer and encoder to thereby adjust a code length during an encoding process.
A code rate adaptive decoding arrangement for a pulse code modulation system comprising a decoder for decoding a code signal to a quantized prediction error and a predictor for producing a prediction, characterized in that a code rate adaptor is further included for producing a code rate adaptive signal based on said prediction to regulate said decoder to thereby adjust a code length during a decoding process.
A code rate adaptive encoding arrangement for a pulse code modulation system comprising a quantizer for quantizing a prediction error derived from an input subtracting a prediction to produce a quantized prediction error, a predictor for producing said prediction based on a quantized input derived from a summation of said prediction and quantized prediction error, and an encoder for encoding said quantized prediction error to produce a code signal, characterized in that a code rate adaptor is further included for producing a code rate adaptive signal based on said quantized prediction error to regulate said quantizer and encoder to thereby adjust a code length during an encoding process.
A code rate adaptive decoding arrangement for a pulse code modulation system comprising a decoder for decoding a code signal to a quantized prediction error and a predictor for producing a prediction, characterized in that a code rate adaptor is further included for producing a code rate adaptive signal based on said quantized prediction error to regulate said decoder to thereby adjust a code length during a decoding process.
A code rate adaptive encoding method for a pulse code modulation system, comprising the steps of:
- quantizing a prediction error derived from an input subtracting a prediction for producing a quantized prediction error;
- producing said prediction based on a quantized input derived from a summation of said prediction and quantized prediction error;
- encoding said quantized prediction error for producing a code signal;
- and
- producing a code rate adaptive signal based on said prediction for regulating a code length for said quantizing a prediction error and encoding said quantized prediction error.
A code rate adaptive decoding method for a pulse code modulation system, comprising the steps of:
- decoding a code signal to a quantized prediction error;
- producing a prediction from a quantized signal;
- producing said quantized signal from a summation of said quantized prediction error and prediction;
- and
- producing a code rate adaptive signal based on said prediction for regulating a code length for said decoding a code signal.
A code rate adaptive encoding method for a pulse code modulation system, comprising the steps of:
- quantizing a prediction error derived from an input subtracting a prediction for producing a quantized prediction error;
- producing said prediction based on a quantized input derived from a summation of said prediction and quantized prediction error;
- encoding said quantized prediction error for producing a code signal;
- and
- producing a code rate adaptive signal based on said quantized prediction error for regulating a code length for said quantizing a prediction error and encoding said quantized prediction error.
A code rate adaptive decoding method for a pulse code modulation system, comprising the steps of:
- decoding a code signal to a quantized prediction error;
- producing a prediction from a quantized signal;
- producing said quantized signal from a summation of said quantized prediction error and prediction;
- and
- producing a code rate adaptive signal based on said quantized prediction error for regulating a code length for said decoding a code signal.
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