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1. (WO2014203640) IMAGE DECODING DEVICE

Pub. No.:    WO/2014/203640    International Application No.:    PCT/JP2014/062329
Publication Date: Thu Dec 25 00:59:59 CET 2014 International Filing Date: Fri May 09 01:59:59 CEST 2014
IPC: H04N 19/129
H04N 1/41
H04N 19/136
H04N 19/176
Applicants: SHIKINO HIGH-TECH CO., LTD.
株式会社シキノハイテック
Inventors: NAKAYAMA, Satoshi
中山 聡
Title: IMAGE DECODING DEVICE
Abstract:
Provided is an image decoding device with which it is possible to increase the processing efficiency of an adaptive scanning unit, and thereby increase the overall processing efficiency. At a minimum, this image decoding device (1) is provided with a decoding unit, an adaptive scanning unit (10), an inverse quantization unit, and a frequency inverse transform unit. The adaptive scanning unit (10) is constituted by a coefficient data replacement process unit (20) for performing a replacement process on coefficient data, a coefficient data storage unit (30) for storing coefficient data that has undergone the replacement process, a replacement information storage unit (40) for storing non-zero frequency data and replacement data, a frequency update process unit (50) for updating non-zero frequency data, and a comparison/substitution process unit (60) for executing a comparison/substitution process on updated storing non-zero frequency data and replacement data. In parallel with the replacement process, the coefficient data replacement process unit (20) outputs to the decoding unit a single-coefficient decoding initiation signal to initiate decoding of the next non-zero coefficient, and following the coefficient data replacement process, and outputs a frequency update initiation signal to the frequency update process unit (50).