JP2010035146A5

JP2010035146A5 -

Info

Publication number: JP2010035146A5
Application number: JP2009139607A
Authority: JP
Filing date: 2009-06-10
Publication date: 2012-07-26
Anticipated expiration: 2029-06-10

Description

本発明は、上述した課題を解決するために、１画面を所定サイズに分割した符号化ブロックを、画面の水平方向へのスキャンを垂直方向に繰り返してスキャンして画像データの量子化を行い、量子化の結果の量子化値を符号化すると共に、量子化に用いた量子化パラメータの符号化ブロックのスキャン順に従った差分を符号化する符号化装置であって、１画面の画像データを符号化ブロック単位に分割し、スキャン順が連続する複数の符号化ブロックからなる符号化グループ単位で振り分けて出力する分割手段と、分割手段が振り分けて出力した各符号化グループの画像データを、互いに並列的に、符号化ブロック単位で量子化パラメータを用いて量子化する複数の量子化手段と、符号化ブロックについて、量子化手段が該符号化ブロックに対する量子化に用いた量子化パラメータと、符号化ブロックに対してスキャン順で直前の符号化ブロックに対する量子化に用いた量子化パラメータとの差分を算出する複数の差分算出手段と、複数の量子化手段による量子化の結果の量子化値と、複数の差分算出手段により算出された差分とを符号化して出力する符号化手段と、複数の量子化手段が量子化に用いた量子化パラメータを保持する保持手段と、量子化手段が量子化する符号化グループの中のスキャン順で後端の符号化ブロックの量子化に用いる量子化パラメータとして、保持手段に保持された、既に量子化が終了している所定の位置の符号化ブロックの量子化に用いた量子化パラメータを適用する量子化制御手段とを備え、量子化制御手段は、量子化手段が量子化を開始する前に、量子化手段に対する、保持手段に保持された、符号化が終了した画面の符号化ブロックの量子化に用いた量子化パラメータの適用を行うことを特徴とする符号化装置である。 In order to solve the above-described problem, the present invention performs quantization of image data by scanning a coding block obtained by dividing one screen into a predetermined size by repeatedly scanning the screen in the horizontal direction in the vertical direction, An encoding device that encodes a quantization value as a result of quantization and encodes a difference according to a scan order of an encoding block of an quantization parameter used for quantization, and encodes image data of one screen The dividing unit that divides the data into coding block units and distributes and outputs the data in units of coding groups including a plurality of coding blocks in which the scan order is continuous, and the image data of each coding group that is distributed and output by the dividing unit are parallel to each other. manner, a plurality of quantization means for quantizing using a quantization parameter in encoding block, the encoding block, the quantizing means is the coded block And the quantization parameters used for the quantization of a plurality of difference calculating means for calculating a difference between the quantization parameters used for the quantization for the immediate coded block in the scan order for the coded blocks, a plurality of quantum Encoding means for encoding the quantization result of the quantization result by the quantization means and the differences calculated by the plurality of difference calculation means, and the quantization parameter used by the plurality of quantization means for quantization The quantization means used for quantization of the encoding block at the rear end in the scan order in the encoding group to be quantized by the holding means to be quantized and the quantization means has already been quantized. and a quantization control means for applying the quantization parameter used for quantization of the encoded blocks of predetermined positions that is, quantization control means, before the quantization means starts quantization For quantizing means, held by the holding means, an encoding device and performs the application of the quantization parameters used for the quantization of the coded block of the screen coding is finished.

また、本発明は、１画面を所定サイズに分割した符号化ブロックを、画面の水平方向へのスキャンを垂直方向に繰り返してスキャンして画像データの量子化を行い、量子化の結果の量子化値を符号化すると共に、量子化に用いた量子化パラメータの符号化ブロックのスキャン順に従った差分を符号化する符号化方法であって、符号化方法を実行する装置の分割手段が、１画面の画像データを符号化ブロック単位に分割し、スキャン順が連続する複数の符号化ブロックからなる符号化グループ単位で振り分けて出力する分割ステップと、装置の量子化手段が、分割ステップにおいて振り分けて出力した各符号化グループの画像データを、互いに並列的に、符号化ブロック単位で量子化パラメータを用いて量子化する複数の量子化ステップと、装置の差分算出手段が、符号化ブロックについて、量子化ステップにおいて該符号化ブロックに対する量子化に用いた量子化パラメータと、該符号化ブロックに対してスキャン順で直前の符号化ブロックに対する量子化に用いた量子化パラメータとの差分を算出する複数の差分算出ステップと、装置の符号化手段が、複数の量子化ステップにおける量子化の結果の量子化値と、複数の差分算出ステップにおいて算出された差分とを符号化して出力する符号化ステップと、装置の保持手段が、複数の量子化ステップにおいて量子化に用いた量子化パラメータを保持手段に保持する保持ステップと、装置の量子化制御手段が、量子化ステップにおいて量子化する符号化グループの中のスキャン順で後端の符号化ブロックの量子化に用いる量子化パラメータとして、保持手段に保持された、既に量子化が終了している所定の位置の符号化ブロックの量子化に用いた量子化パラメータを適用する量子化制御ステップとを備えることを特徴とする符号化方法である。
In addition, the present invention quantizes image data by scanning an encoded block obtained by dividing one screen into a predetermined size by repeatedly scanning the screen in the horizontal direction in the vertical direction, and quantizing the quantization result. An encoding method for encoding a value and encoding a difference according to a scan order of an encoding block of a quantization parameter used for quantization , wherein a dividing unit of an apparatus for executing the encoding method includes: the image data is divided into coded blocks, and a plurality of dividing step of outputting distribution in coding group unit consisting of the coding block scan order is consecutive, the quantization unit of the apparatus, by distributing in the dividing step output the image data of each coding group that, in parallel with each other, a plurality of quantization steps for quantizing using a quantization parameter in encoding block, instrumentation The difference calculating means location, for coding block, the quantization parameters used for the quantization for the coding block in the quantization step, the quantization for the immediate coded block in the scan order with respect to the coding block a plurality of difference calculation step of calculating a difference between the quantization parameters used, the coding means of the apparatus, and the quantized value of the result of put that quantization to a plurality of quantization steps, our multiple difference calculation step a coding step for had a calculated differences by coded output, holding means of the device, a holding step of holding the holding means the quantization parameter used in quantization in the plurality of quantization step, device quantum is controlling means, quantization para used for quantization of the rear end of the coding blocks in the scan order in the encoded group of quantized in the quantization step As over data, stored in the storage means, already a feature in that Ru and a quantization control step of applying the quantization parameter used in quantization of the coding blocks of a predetermined position quantization is completed This is an encoding method.

Claims

An encoding block obtained by dividing one screen into a predetermined size is scanned by repeatedly scanning the screen in the horizontal direction in the vertical direction to quantize the image data, and encode the quantized value of the quantization result And an encoding device that encodes a difference according to a scan order of the encoding block of the quantization parameter used for the quantization,
Dividing means for dividing image data of one screen into the encoded block units, and distributing and outputting the encoded groups composed of a plurality of the encoded blocks in which the scan order is continuous;
A plurality of quantization means for quantizing the image data of each coding group distributed and output by the dividing means in parallel with each other using a quantization parameter in units of the coding blocks;
For the encoding block, the quantizing means is used for the quantization for the coded block of the immediately preceding and the quantization parameters used for the quantization for the coding block, in the scanning order with respect to the encoded block Quantum A plurality of difference calculating means for calculating a difference from the activation parameter;
Encoding means for encoding and outputting a quantization value of the result of the quantization by the plurality of quantization means and the difference calculated by the plurality of difference calculation means;
Holding means for said plurality of quantization means for holding a quantization parameter used in the quantization,
As quantization parameters that used for quantization of the scanning order at the rear end of the marks Goka block in the encoding group to which the quantization means quantizes, held in the holding means, already completed quantization encoding device, characterized in that Ru and a quantization control means for applying the quantization parameter used for quantization of the encoded blocks of predetermined positions you are.

The quantization control means includes
As quantization parameter used in quantization of the coding block before SL after the end,
Held by the holding means, applying the quantization parameter used coding block and the position of the rear end in the different screens which are encoded prior to the screen in the quantization of the corresponding coding block The encoding device according to claim 1, characterized in that:

The quantization control means, as the quantization parameter used in quantization of the coding block before SL after the end,
Wherein stored in the storage unit, and the quantization parameter used for quantizing the coded blocks coded block and the position of the rear end corresponding in different screens encoded prior to the screen, the different screen the encoding apparatus according to claim 1, characterized in that the position to apply the generated value based on the quantization parameter used for quantization of the coded block located in the vicinity of the corresponding coded block in.

The encoding block is set to one of a plurality of types of predictive encoding with different temporal reference relationships ,
The quantization control means, as a quantization parameters that used for quantization of the marks Goka block of said rear end,
Wherein stored in the storage means, use a quantization of coded blocks coded block and location and type of the predictive coding of said rear end are both corresponding the prior to encoded different screens on the screen The encoding apparatus according to claim 1, wherein the quantization parameter is applied.

The quantization control means, as the quantization parameter said quantization means uses a quantization of the coding block before SL after the end,
Wherein stored in the storage unit, used for quantization of the coded block of the front end of the mark Goka group immediately in the scan order on the encoded groups whose coded block of the rear end of the screen The encoding apparatus according to claim 1, wherein a quantization parameter is applied.

The quantization control means includes
Other of the quantizing means, the marks Goka group immediately in the scanning order with respect to marks Goka group to which the quantization means is Ru contains lines cormorants marks Goka block quantization, the front end in the scanning order As a quantization parameter used for quantization of the coding block of
Applying a quantization parameter used for quantization of a coding block held in the holding unit and corresponding in position to the coding block at the front end in a different screen coded prior to the screen. The encoding device according to claim 1 or 5.

The quantization control means includes
The predetermined quantization parameter is applied as a quantization parameter used for quantization of the coding block having the earliest scan order among the coding blocks obtained by dividing the screen. 6. The encoding device according to 6.

The encoding block is set to one of a plurality of types of predictive encoding with different temporal reference relationships ,
The quantization control means, as a quantization parameters that used for quantization of the scanning order at the front end of the mark Goka blocks in the coded groups,
Held by the holding means, also coding block and location and type of the predictive coding of the front end in the prior to encoded different screens on the screen is one used in the quantization of the corresponding coding block encoding apparatus according to any one of claims 5 to 7, characterized in that applying the quantization parameter.

An encoding block obtained by dividing one screen into a predetermined size is scanned by repeatedly scanning the screen in the horizontal direction in the vertical direction to quantize the image data, and encode the quantized value of the quantization result And an encoding method for encoding a difference according to a scan order of the encoding block of the quantization parameter used for the quantization,
A dividing unit of an apparatus that executes the encoding method divides image data of one screen into the encoding block unit, and distributes the encoding group including a plurality of the encoding blocks in which the scan order is continuous. A split step to output;
A plurality of quantization steps in which the quantization means of the device quantizes the image data of each coding group distributed and output in the division step in parallel using the quantization parameter in units of the coding blocks. When,
Difference calculating means of the device for the coding block, a quantization parameter used for quantization to said encoded block in the quantization step, the encoding of the immediately preceding in the scanning order with respect to the encoded block A plurality of difference calculation steps for calculating a difference with a quantization parameter used for quantization on the block;
Code encoding means of the device, in which the quantized values results put that the quantization in said plurality of quantization step, said plurality of said the difference calculated Oite the difference calculation step is encoded output Step,
A holding step holding means of the apparatus, for retaining the holding means quantization parameters used for the quantization in said plurality of quantization step,
Quantization control means of the device, as the quantization parameters that used for quantization of the marks Goka block of the scanning order at the rear end in the marks Goka group you quantization in said quantization step, said retaining means coding method characterized by Ru and a quantization control step, which is held, already applied to the quantization parameter used for quantizing the coding blocks in the predetermined position where the quantization has been completed.

The program for functioning a computer as each means of the encoding apparatus of any one of Claims 1 thru | or 8 .