Encoding and decoding of a digital signal
First Claim
1. A method of encoding a digital signal and its blocks of digital samples for transmission over a packet switched network, the method including steps of:
- quantizing the binary representations of the digital samples to more coarsely representations of the digital samples;
generating prediction samples as fixed point or floating point representations based on previous, quantized digital samples of said quantizing step; and
lossless encoding the quantized digital samples conditioned on the fixed point or floating point representations of the generated prediction samples.
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Abstract
The invention relates to methods for encoding/decoding of a digital signal which is transmitted over a packet switched network. Prediction samples are generated at the transmitting and receiving end. The digital signal is lossless encoded at the transmitting end, and lossless decoded at the receiving end, based on the quantizations of generated prediction samples. During encoding, the generated prediction samples are quantized separately from the quantization of the digital samples. The predictions are used in the index domain in the form of quantized indices during encoding/decoding of the digital signal.
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Citations
30 Claims
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1. A method of encoding a digital signal and its blocks of digital samples for transmission over a packet switched network, the method including steps of:
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quantizing the binary representations of the digital samples to more coarsely representations of the digital samples;
generating prediction samples as fixed point or floating point representations based on previous, quantized digital samples of said quantizing step; and
lossless encoding the quantized digital samples conditioned on the fixed point or floating point representations of the generated prediction samples. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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15. A method of decoding a digital signal and its blocks of digital samples received from a packet switched network, the method comprising steps of:
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generating prediction samples as fixed point or floating point representations based on previous, quantized digital samples of said digital signal resulting from a lossless decoding of received code words;
lossless decoding received code words conditioned on the fixed point or floating point representations of the generated prediction samples; and
de-quantizing quantized digital samples resulting from the lossless decoding step into binary representations of the digital samples of said digital signal.
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29. A computer readable medium having computer executable instructions for causing a digital signal and its blocks of digital samples to be encoded for transmission over a packet switched network, the computer executable instructions performing steps of:
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quantizing the binary representations of the digital samples to more coarsely representations of the digital samples;
generating prediction samples as fixed point or floating point representations based on previous, quantized digital samples of said quantizing step; and
lossless encoding the quantized digital samples conditioned on the fixed point or floating point representations of the generated prediction samples.
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30. A computer readable medium having computer executable instructions for causing a digital signal and its blocks of digital samples received from a packet switched network to be decoded, the computer executable instructions performing steps of:
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generating prediction samples as fixed point or floating point representations based on previous, quantized digital samples of said digital signal resulting from a lossless decoding of received code words;
lossless decoding received code words conditioned on the fixed point or floating point representations of the generated prediction samples; and
de-quantizing quantized digital samples resulting from the lossless decoding step into binary representations of the digital samples of said digital signal.
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Specification