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Embedding quantization system for vector signals

  • US 4,639,778 A
  • Filed: 07/30/1984
  • Issued: 01/27/1987
  • Est. Priority Date: 07/28/1983
  • Status: Expired due to Term
First Claim
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1. In an embedding quantization system of a vector signal comprising:

  • an input terminal for receiving a sampled input signal;

    a quantizer;

    a predictor having an input coupled to the output of said quantizer;

    a subtractor for providing the difference between the input signal and the output of said predictor, to said quantizer;

    wherein the input signal applied to said input terminal is a vector signal which is subject to quantization;

    an adder means for providing a sum of the output of said quantizer and the output of said predictor, to the input of said predictor, wherein a prediction by said predictor and a quantization by said quantizer are input of said predictor, wherein a prediction by said predictor and a quantization by said quantizer are accomplished a plurality of times by feeding back the output of said predictor to the input of said predictor through said adder means to provide a plurality of quantized output signals;

    a quantization control means;

    a first switch for switching the input of said predictor wherein the input signal is applied to said predictor at a first clock period for the embedding quantization operation, and the output of said adder is applied to the predictor at other clock periods controlled by said quantization control means; and

    a second switch, coupled to the output of said quantizer, for providing quantized output signals to an external circuit under the control of said quantization control means.

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