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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTomohiro Kimura, Masayuki Yoshida
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The present invention aims to increase an encoding efficiency when the occurrence probability of LPS (less probable symbol) is low. An encoding apparatus has a interval size (A), a interval limit value (C), divides a set interval which is set on a number line, selects a sub-interval corresponding to an occurring symbol, updates the interval size (A) and the interval limit value (C) with a limited precision based on the selected sub-interval size, and encodes a coordinate within the interval. Based on the probability (the occurrence probability of symbol) output from a learning memory, the sub-interval size (LSZ, dLSZ) and the sub-interval limit value are obtained. A correction value calculator computes the correction value based on the dLSZ, reflects the computed correction value (dA, dC) to the renormalized subinterval size (rA) and the renormalized sub-interval limit value (rC), updates the interval size (A7) to the sub-interval size, updates the interval limit value (C8) to the sub-interval limit value, and outputs a code.
An encoding apparatus for storing a interval size and a interval limit value, dividing a set interval set on a number line, selecting a sub-interval corresponding to an occurring symbol, updating the set interval to the subinterval selected, and based on the sub-interval selected, updating the interval size and the interval limit value with a limited precision, and encoding a coordinate within the interval,
A decoding apparatus for storing a interval size and a interval limit value, dividing a set interval set on a number line, selecting a sub-interval including a code value, updating the interval size and the interval limit value with a limited precision, and decoding the code value into a symbol,
17 The decoding apparatus of claim 16, wherein the minute interval is assigned a code value and used for notifying of a synchronous timing for an interrupt processing.
An encoding/decoding apparatus having:
An encoding method having a interval size and a interval limit value, dividing a set interval set on a number line, selecting a sub-interval corresponding to an occurring symbol, updating the set interval to the subinterval selected, updating the interval size and the interval limit value with a limited precision, and encoding a coordinate within the interval;
A decoding method having a interval size and a interval limit value, dividing a set interval set on a number line, selecting a sub-interval including a code value, updating the interval size with the sub-interval selected, updating the interval size and the interval limit value with a limited precision, and decoding the code value into the symbol,
An encoding/decoding method having:
A program having a computer perform an encoding process including a interval size and a interval limit value, dividing a set interval set on a number line, selecting a sub-interval corresponding to an occurring symbol, updating the set interval to the sub-interval selected, updating the interval size and the interval limit value with a limited precision, and encoding a coordinate within the interval,
Dependencies are inferred from the claim text.