Variable length decoder and variable length decoding method

Details Variable length decoder and variable length decoding method Variable length decoder and variable length decoding method

2007-08-28

2007-08-28

Jeanglaude, Jean Bruner (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

To or from number of pulses

C341S063000, C348S426100

Reexamination Certificate

active

11085064

ABSTRACT:
A variable length decoder comprises: a first storage unit that stores encoded data; a variable length decoding unit; a second storage unit that stores coefficient data; a reverse quantizing unit; and a reverse DCT unit. The variable length decoding unit includes a control unit, a decoding unit, and an address generating unit. The second storage unit includes an initializing mechanism and is initialized all at once by the control unit in advance of decoding in a macro block unit. Only non-zero quantized data decoded by the decoding unit is stored in an address of the second storage unit generated by the address generating unit. The reverse quantizing unit reads and performs reverse quantization of the quantized data from the second storage unit, the reverse DCT unit performs reverse DCT, and then decoded data is acquired.

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