Predictive coding device
First Claim
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1. A predictive coding device, comprising:
- input means arranged to input a sampled value;
predicting means for outputting a predicted value for said sampled value input through said input means; and
look-up table means which includes a memory in which predictive coded values and local decoded values corresponding to sampled values and predicted values are memorized, arranged to read out a predictive coded value and a local decoded value from an address of said memory determined by said sampled value input through said input means and said predicted value output from said predicting means.
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Abstract
A predictive coding device has an input terminal through which a sampled value is input, a predicting circuit for outputting a predicted value for the sampled value which has been input through the input terminal, and a look-up table arranged to receive, as a readout address, the sampled value input through the input terminal and the predicted value and then to output a predictive coded value. On the basis of the input sampled value and the predicted value, the predictive coding device determines the readout address for the look-up table which stores a table providing the predictive coded value.
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Citations
17 Claims
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1. A predictive coding device, comprising:
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input means arranged to input a sampled value; predicting means for outputting a predicted value for said sampled value input through said input means; and look-up table means which includes a memory in which predictive coded values and local decoded values corresponding to sampled values and predicted values are memorized, arranged to read out a predictive coded value and a local decoded value from an address of said memory determined by said sampled value input through said input means and said predicted value output from said predicting means. - View Dependent Claims (2, 3, 4, 5)
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6. A predictive decoding device, comprising:
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input means arranged to input a predictive coded value; predicting means for outputting a predicted value for a sampled value corresponding to said predictive coded value input through said input means; and look-up table means which includes a memory in which decoded values corresponding to predictive coded values and predicted values are memorized, arranged to read out a decoded value from an address of said memory determined by said predictive coded value input through said input means and said predicted value output from said predicting means, said decoded values memorized in said memory being rewritable. - View Dependent Claims (7, 8)
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9. A predictive coding device, comprising:
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input means arranged to input a sampled value; predicting means for outputting a predicted value for said sampled value input through said input means; look-up table means which includes a random access memory in which predictive coded values corresponding to sampled values and predicted values are memorized, arranged to read out a predictive coded value from an address of said random access memory determined by said sampled value input through said input means and said predicted value output from said predicting means; and writing means for writing predictive coded values corresponding to sampled values and predicted values into said random access memory. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A predictive decoding device, comprising:
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input means arranged to input a predictive coded value; predicting means for outputting a predicted value for a sampled value corresponding to said predictive coded value input through said input means; look-up table means which includes a random access memory in which decoded values corresponding to predictive coded values and predicted values are memorized, arranged to read out a decoded value from an address of said random access memory determined by said predictive coded value input through said input means and said predicted value output from said predicting means; and writing means for writing decoded values corresponding to predictive coded values and predicted values into said random access memory. - View Dependent Claims (17)
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Specification