JP2008206211A5

JP2008206211A5 -

Info

Publication number: JP2008206211A5
Application number: JP2008145168A
Authority: JP
Filing date: 2008-06-02
Publication date: 2010-03-25
Anticipated expiration: 2025-03-16

Claims

A prediction signal generation step for obtaining a prediction signal of a pixel block of the input image signal;
A prediction error generating step for obtaining a prediction error signal of the pixel block based on the input image signal and the prediction signal;
An orthogonal transformation step of orthogonally transforming the prediction error signal to obtain an orthogonal transformation signal;
A quantization step of obtaining a quantization transform coefficient of the orthogonal transform signal by quantization according to a quantization matrix;
Of the pixel block,
(1) Index information corresponding to the quantization matrix,
(2) Prediction mode information indicating a prediction method of the prediction signal, and
(3) an encoding step for encoding information indicating the quantized transform coefficient;
A video encoding method comprising:

In the encoding step, quantization mode information indicating whether the quantization matrix is set in a pixel block unit or a second mode in which a flat matrix is used for each pixel block in the slice is used in slice units. Encoded with
The encoding step encodes the index information when the pixel block is a pixel block in the slice of the first mode.
The moving picture coding method according to claim 1, wherein:

A prediction signal generation unit for obtaining a prediction signal of a pixel block of an input image signal;
A prediction error generation unit for obtaining a prediction error signal of the pixel block based on the input image signal and the prediction signal;
An orthogonal transform unit that orthogonally transforms the prediction error signal to obtain an orthogonal transform signal;
A quantization unit for obtaining a quantized transform coefficient of the orthogonal transform signal by quantization according to a quantization matrix;
Of the pixel block,
(1) Index information corresponding to the quantization matrix,
(2) Prediction mode information indicating a prediction method of the prediction signal, and
(3) an encoding unit that encodes information indicating the quantized transform coefficient;
A video encoding device comprising:

The encoding unit includes quantization mode information indicating whether the quantization matrix is set in a pixel block unit or a second mode in which a flat matrix is used for each pixel block in the slice. Encoded with
The encoding unit encodes the index information when the pixel block is a pixel block in the slice of the first mode.
The moving picture coding apparatus according to claim 3.

Of the pixel block of the decoding target image,
(1) Index information corresponding to the quantization matrix,
(2) Prediction mode information indicating a prediction method of a prediction signal, and
(3) a decoding step of decoding information indicating quantized transform coefficients;
An inverse quantization step of obtaining an orthogonal transform signal from the quantized transform coefficient by inverse quantization according to the quantization matrix indicated by the index information;
An inverse orthogonal transform step for inverse orthogonal transform of the orthogonal transform signal to obtain a prediction error signal;
A prediction signal generation step of obtaining the prediction signal of the pixel block using the prediction method indicated by the prediction mode information;
A decoded image generation step for obtaining a decoded image signal of the pixel block based on the prediction error signal and the prediction signal;
A video decoding method comprising:

In the decoding step, quantization mode information indicating whether the quantization matrix is set in a pixel block unit or a second mode in which a flat matrix is used for each pixel block in the slice is provided in a slice unit. Decrypt,
The decoding step decodes the index information when the pixel block is a pixel block in the slice of the first mode,
The inverse quantization step performs inverse quantization according to a flat matrix when the quantization mode information indicates a second mode;
The moving picture decoding method according to claim 5, wherein:

Of the pixel block of the decoding target image,
(1) Index information corresponding to the quantization matrix,
(2) Prediction mode information indicating a prediction method of a prediction signal, and
(3) a decoding unit that decodes information indicating quantized transform coefficients;
An inverse quantization unit for obtaining an orthogonal transform signal from the quantized transform coefficient by inverse quantization according to the quantization matrix indicated by the index information;
An inverse orthogonal transform unit that obtains a prediction error signal by performing inverse orthogonal transform on the orthogonal transform signal;
A prediction signal generation unit for obtaining the prediction signal of the pixel block using the prediction method indicated by the prediction mode information;
A decoded image generation unit for obtaining a decoded image signal of the pixel block based on the prediction error signal and the prediction signal;
A video decoding device comprising:

The decoding unit includes quantization mode information that indicates whether the quantization matrix is set in a pixel block unit or a second mode in which a flat matrix is used for each pixel block in the slice. Decrypt,
The decoding unit decodes the index information when the pixel block is a pixel block in the slice of the first mode,
The inverse quantization unit performs inverse quantization according to a flat matrix when the quantization mode information indicates a second mode.
The moving picture decoding apparatus according to claim 7, wherein: