摘要:
According to the present invention, there is provided an image decoding apparatus having: a table selection controller configured to output a syntax selection signal which selects one of a prefix level_prefix, a suffix level_suffix, and a TrailingOnes syntax; a variable-length code decoding device configured to receive a bit stream, the syntax selection signal, and a suffix length suffixLength, and, by using data contained in the bit stream and the suffix length suffixLength, simultaneously decode the prefix level_prefix and the suffix level_suffix and output the result if the syntax selection signal selects the prefix level_prefix and the suffix level_suffix, and decode the TrailingOnes syntax and output the result if the syntax selection signal selects the TrailingOnes syntax; a level formation device configured to receive the decoded prefix level_prefix, the decoded suffix level_suffix, and the decoded TrailingOnes syntax, and form and output a level; and a suffix length updating device configured to receive the decoded prefix level_prefix, the decoded suffix level_suffix, and the decoded TrailingOnes syntax, and update the suffix length suffixLength.
摘要:
An encoding apparatus includes: an orthogonal transformation unit configured to orthogonally transform image data of a predetermined block size; a binarization unit configured to binarize the image data outputted from the orthogonal transformation unit; an arithmetic encoding unit configured to arithmetically encode the binary data generated by the binarization unit; and a prediction unit configured to predict, from the binary data, whether or not the amount of arithmetically encoded data generated by the arithmetic encoding unit exceeds a permissible maximum code amount based on a predetermined encoding standard. The encoding apparatus performs, when the prediction result is that the amount of arithmetically encoded data exceeds the maximum code amount, control to prevent the arithmetic encoding by the arithmetic encoding unit from being performed to the binary data corresponding to the prediction result.
摘要:
An image coding apparatus includes a variable length coding section, an arithmetic coding section and a common buffer memory. The variable length coding section inputs image data and outputs a binarized code sequence applied with variable length coding. The arithmetic coding section applies arithmetic coding to the binarized code sequence outputted from the variable length coding section. The common buffer memory transmits and receives data between the variable length coding section and the arithmetic coding section.
摘要:
An image coding apparatus includes a variable length coding section, an arithmetic coding section and a common buffer memory. The variable length coding section inputs image data and outputs a binarized code sequence applied with variable length coding. The arithmetic coding section applies arithmetic coding to the binarized code sequence outputted from the variable length coding section. The common buffer memory transmits and receives data between the variable length coding section and the arithmetic coding section.
摘要:
The image decoding apparatus and the image decoding method according to one aspect of the present invention have a configuration for storing an image decoded in the past as a reference picture into a frame memory, in a field structure in which top lines in the reference picture are stored in a top area and bottom lines in the reference picture are stored in a bottom area, in order to use a part of the image decoded in the past as a reference block in a picture being presently decoded; and selectively copying and storing an uppermost top line or an uppermost bottom line in the reference picture to areas on the uppermost top line and the uppermost bottom line in the reference picture in the top area and the bottom area in the frame memory, and selectively copying and storing a lowermost top line or a lowermost bottom line in the reference picture to areas under the lowermost top line and the lowermost bottom line in the reference picture in the top area and the bottom area in the frame memory.
摘要:
An image decoding apparatus having: a table selection controller configured to output a syntax selection signal which selects one of a prefix, a suffix, and a syntax; a variable length code decoding device configured to receive a bit stream, the syntax selection signal, and a suffix length, and, by using data contained in the bit stream and the suffix length, simultaneously decode the prefix and the suffix and output the result if the syntax selection signal selects the prefix 1 and the suffix, and decode the syntax and output the result if the syntax selection signal selects the syntax; a level formation device configured to receive the decoded prefix, the decoded suffix, and the decoded syntax, and form and output a level; and a suffix length updating device configured to receive the decoded prefix, the decoded suffix, and the decoded syntax, and update the suffix length.
摘要:
When a combination between a plurality of FIFO memories and a variable length coding table is used, a load generated by an increase in number of FIFO memories serving as output destinations of a codeword length output from the variable length coding table when the codeword length is output is reduced. A variable length code decoding apparatus includes an input unit which receives variable length coding data, a plurality of FIFO memories which store the variable length coding data and output or update the variable length coding data on the basis of a codeword length of the variable length coding data, a FIFO input selecting unit which outputs the variable length coding data to one of the plurality of FIFO memories, a variable length coding table storing unit which stores a variable length coding table representing a relationship between the variable length coding data, the codeword length and a decoding value, reads the variable length coding data stored in one of the plurality of FIFO memories, and compares the read variable length coding data with the variable length coding table, a table selecting unit which determines the codeword length and the decoding value on the basis of a comparison result of the variable length coding table storing unit, and outputs the determined codeword length to one of the plurality of FIFO memories, and a control unit which selects one of the plurality of FIFO memories as a destination FIFO memory, reads the variable length coding data from the input unit or one of the unselected FIFO memories, and controls the FIFO input selecting unit such that the read variable length coding data is output to the selected FIFO memory.
摘要:
The image decoding apparatus and the image decoding method according to one aspect of the present invention have a configuration for storing an image decoded in the past as a reference picture into a frame memory, in a field structure in which top lines in the reference picture are stored in a top area and bottom lines in the reference picture are stored in a bottom area, in order to use a part of the image decoded in the past as a reference block in a picture being presently decoded; and selectively copying and storing an uppermost top line or an uppermost bottom line in the reference picture to areas on the uppermost top line and the uppermost bottom line in the reference picture in the top area and the bottom area in the frame memory, and selectively copying and storing a lowermost top line or a lowermost bottom line in the reference picture to areas under the lowermost top line and the lowermost bottom line in the reference picture in the top area and the bottom area in the frame memory.
摘要:
An image processing apparatus includes: a frame memory; a buffer memory that stores pixel values of macroblocks of a first region including a first macroblock; a deblocking filter unit that is operable to: (1) read out the pixel values of the first region from the buffer memory; (2) apply the deblocking filter to the first macroblock; and (3) store the pixel values back into the buffer memory; and a pixel transfer unit that is operable to: (4) transfer pixel values of a macroblock not included in a second region that includes a second macroblock to be processed next to the first macroblock, from the buffer memory to the frame memory; and (5) transfer pixel values of a macroblock included in the second region but not included in the first region, from the frame memory to the buffer memory.
摘要:
A moving image compression-coding device has a pixel determination module configured to determine whether a color of each pixel in a macro block having a plurality of pixels in an input image is a predetermined color, a pixel counter configured to count a number of the pixels having the predetermined color in the macro block, a macro block determination module configured to determine whether a color of the macro block is considered to be the predetermined color according to the count result, and a compression-coded data generator configured to compression-code the input image with a compression ratio depending on the determination result.