JP2009177356A5 - - Google Patents

Claims (8)

An image decoding device for decoding a binary arithmetically encoded video stream,
Arithmetic decoding means for arithmetic decoding the video stream;
Storage means for storing binary data arithmetically decoded by the arithmetic decoding means;
The binary data arithmetically decoded by the arithmetic decoding means is binary decoded, and the position where the binary data is stored in the storage means and the image position after the binary data is decoded Address calculating means for calculating address data to be related;
Reading means for reading binary data stored in the storage means;
N (where N is a natural number greater than or equal to 2) binary decoding units, and the binary data read by the reading unit is converted into the N binary decoding units based on the address data. And a binary decoding means for performing binary decoding processing in a shared manner . The video stream is encoded in units of blocks composed of a predetermined number of pixels,
The image decoding apparatus according to claim 1, wherein the address calculation unit calculates the address data in units of a predetermined number of blocks.   The image decoding apparatus according to claim 2, wherein the predetermined number of block units is a unit corresponding to a horizontal screen width of an image.   3. The image decoding apparatus according to claim 2, wherein the predetermined number of block units are macroblocks each including 16 pixels vertically and horizontally.   The image decoding apparatus according to claim 1, wherein the N binary decoding units perform binary decoding processing in parallel. An image decoding method for decoding a binary arithmetically encoded video stream, comprising:
An arithmetic decoding step of arithmetic decoding the video stream;
A storage step of storing the binary data arithmetically decoded in the arithmetic decoding step in a storage means;
The binary data arithmetically decoded in the arithmetic decoding step is binary decoded, and the position where the binary data is stored in the storage means and the image position after the binary data is decoded An address calculation step for calculating address data to be related;
A reading step of reading binary data stored in the storage means;
N (where N is a natural number greater than or equal to 2) binary decoding units, the binary data read in the reading step is converted into the N binary decoding units based on the address data. An image decoding method comprising: a binary decoding step in which each of them is shared and performs a binary decoding process . A program for causing a computer to execute a process of decoding a binary arithmetically encoded video stream,
An arithmetic decoding step of arithmetic decoding the video stream;
A storage step of storing the binary data arithmetically decoded in the arithmetic decoding step in a storage means;
The binary data arithmetically decoded in the arithmetic decoding step is binary decoded, and the position where the binary data is stored in the storage means and the image position after the binary data is decoded An address calculation step for calculating address data to be related;
A reading step of reading binary data stored in the storage means;
N (where N is a natural number greater than or equal to 2) binary decoding units, the binary data read in the reading step is converted into the N binary decoding units based on the address data. A program that causes a computer to execute a binary decoding process in which each of them shares a binary decoding process .   A computer-readable storage medium storing the program according to claim 7.