JP2014014135A5

JP2014014135A5 -

Info

Publication number: JP2014014135A5
Application number: JP2013180094A
Authority: JP
Filing date: 2013-08-30
Publication date: 2014-04-24
Anticipated expiration: 2031-06-23

Description

イントラ予測モードに関する情報を復号して、ブロック単位で輝度信号と色差信号とを含む画像信号をイントラ予測復号する画像復号装置であって、画像信号を符号化ブロック単位でイントラ予測する際、輝度信号を水平および垂直に分割する分割モードが取得され、色差フォーマットが４：２：０である場合、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モード、第２の輝度信号の予測ブロックのイントラ輝度予測モード、第３の輝度信号の予測ブロックのイントラ輝度予測モード、第４の輝度信号の予測ブロックのイントラ輝度予測モード、第１の輝度信号の予測ブロックと同一の基準位置にある色差信号の予測ブロックのイントラ色差予測モードの順序で予測モードに関する符号化情報が配列された符号化列から、この順序で輝度信号の予測ブロックのイントラ輝度予測モードに関する情報と色差信号の予測ブロックのイントラ色差予測モードに関する情報を復号する符号化列復号部と、前記分割モードが設定された場合、前記符号化ブロックの輝度信号を水平および垂直に分割した第１〜第４の輝度信号の予測ブロックを設定して、復号された前記輝度信号の予測ブロック毎のイントラ輝度予測モードに関する情報により得られた各イントラ輝度予測モードに応じて、周囲の復号済みの輝度信号のブロックから輝度信号を予測する輝度信号イントラ予測部と、前記分割モードが設定され、色差フォーマットが４：２：０である場合、前記符号化ブロックの色差信号を分割することなく色差信号の予測ブロックを設定して、復号されたイントラ色差予測モードに関する情報により得られたイントラ色差予測モードに応じて、周囲の復号済みの色差信号のブロックから色差信号を予測する色差信号イントラ予測部とを備え、前記色差信号イントラ予測部は、イントラ輝度予測モードに応じてイントラ色差予測モードを設定するモードにおいて、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モードを示す値を、前記符号化ブロック内の色差信号の予測ブロックのイントラ色差予測モードを示す値に用いることにより、イントラ色差予測モードを設定することを特徴とする画像復号装置を提供する。
イントラ予測モードに関する情報を復号して、ブロック単位で輝度信号と色差信号とを含む画像信号をイントラ予測復号する画像復号方法であって、画像信号を符号化ブロック単位でイントラ予測する際、輝度信号を水平および垂直に分割する分割モードが取得され、色差フォーマットが４：２：０である場合、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モード、第２の輝度信号の予測ブロックのイントラ輝度予測モード、第３の輝度信号の予測ブロックのイントラ輝度予測モード、第４の輝度信号の予測ブロックのイントラ輝度予測モード、第１の輝度信号の予測ブロックと同一の基準位置にある色差信号の予測ブロックのイントラ色差予測モードの順序で予測モードに関する符号化情報が配列された符号化列から、この順序で輝度信号の予測ブロックのイントラ輝度予測モードに関する情報と色差信号の予測ブロックのイントラ色差予測モードに関する情報を復号する符号化列復号ステップと、前記分割モードが設定された場合、前記符号化ブロックの輝度信号を水平および垂直に分割した第１〜第４の輝度信号の予測ブロックを設定して、復号された前記輝度信号の予測ブロック毎のイントラ輝度予測モードに関する情報により得られた各イントラ輝度予測モードに応じて、周囲の復号済みの輝度信号のブロックから輝度信号を予測する輝度信号イントラ予測ステップと、前記分割モードが設定され、色差フォーマットが４：２：０である場合、前記符号化ブロックの色差信号を分割することなく色差信号の予測ブロックを設定して、復号されたイントラ色差予測モードに関する情報により得られたイントラ色差予測モードに応じて、周囲の復号済みの色差信号のブロックから色差信号を予測する色差信号イントラ予測ステップとを有し、前記色差信号イントラ予測ステップにおいて、イントラ輝度予測モードに応じてイントラ色差予測モードを設定するモードにおいて、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モードを示す値を、前記符号化ブロック内の色差信号の予測ブロックのイントラ色差予測モードを示す値に用いることにより、イントラ色差予測モードを設定することを特徴とする画像復号方法を提供する。
イントラ予測モードに関する情報を復号して、ブロック単位で輝度信号と色差信号とを含む画像信号をイントラ予測復号する画像復号プログラムであって、画像信号を符号化ブロック単位でイントラ予測する際、輝度信号を水平および垂直に分割する分割モードが取得され、色差フォーマットが４：２：０である場合、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モード、第２の輝度信号の予測ブロックのイントラ輝度予測モード、第３の輝度信号の予測ブロックのイントラ輝度予測モード、第４の輝度信号の予測ブロックのイントラ輝度予測モード、第１の輝度信号の予測ブロックと同一の基準位置にある色差信号の予測ブロックのイントラ色差予測モードの順序で予測モードに関する符号化情報が配列された符号化列から、この順序で輝度信号の予測ブロックのイントラ輝度予測モードに関する情報と色差信号の予測ブロックのイントラ色差予測モードに関する情報を復号する符号化列復号ステップと、前記分割モードが設定された場合、前記符号化ブロックの輝度信号を水平および垂直に分割した第１〜第４の輝度信号の予測ブロックを設定して、復号された前記輝度信号の予測ブロック毎のイントラ輝度予測モードに関する情報により得られた各イントラ輝度予測モードに応じて、周囲の復号済みの輝度信号のブロックから輝度信号を予測する輝度信号イントラ予測ステップと、前記分割モードが設定され、色差フォーマットが４：２：０である場合、前記符号化ブロックの色差信号を分割することなく色差信号の予測ブロックを設定して、復号されたイントラ色差予測モードに関する情報により得られたイントラ色差予測モードに応じて、周囲の復号済みの色差信号のブロックから色差信号を予測する色差信号イントラ予測ステップとをコンピュータに実行させ、前記色差信号イントラ予測ステップにおいて、イントラ輝度予測モードに応じてイントラ色差予測モードを設定するモードにおいて、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モードを示す値を、前記符号化ブロック内の色差信号の予測ブロックのイントラ色差予測モードを示す値に用いることにより、イントラ色差予測モードを設定することを特徴とする画像復号プログラムを提供する。
符号化ストリームから、イントラ予測モードに関する情報を復号して、ブロック単位で輝度信号と色差信号とを含む画像信号をイントラ予測復号する受信装置であって、動画像が符号化された符号化データを受信する受信部と、前記符号化データをパケット処理して前記符号化ストリームを生成するパケット処理部と、前記符号化ストリームから、画像信号を符号化ブロック単位でイントラ予測する際、輝度信号を水平および垂直に分割する分割モードが取得され、色差フォーマットが４：２：０である場合、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モード、第２の輝度信号の予測ブロックのイントラ輝度予測モード、第３の輝度信号の予測ブロックのイントラ輝度予測モード、第４の輝度信号の予測ブロックのイントラ輝度予測モード、第１の輝度信号の予測ブロックと同一の基準位置にある色差信号の予測ブロックのイントラ色差予測モードの順序で予測モードに関する符号化情報が配列された符号化列から、この順序で輝度信号の予測ブロックのイントラ輝度予測モードに関する情報と色差信号の予測ブロックのイントラ色差予測モードに関する情報を復号する符号化列復号部と、前記分割モードが設定された場合、前記符号化ブロックの輝度信号を水平および垂直に分割した第１〜第４の輝度信号の予測ブロックを設定して、復号された前記輝度信号の予測ブロック毎のイントラ輝度予測モードに関する情報により得られた各イントラ輝度予測モードに応じて、周囲の復号済みの輝度信号のブロックから輝度信号を予測する輝度信号イントラ予測部と、前記分割モードが設定され、色差フォーマットが４：２：０である場合、前記符号化ブロックの色差信号を分割することなく色差信号の予測ブロックを設定して、復号されたイントラ色差予測モードに関する情報により得られたイントラ色差予測モードに応じて、周囲の復号済みの色差信号のブロックから色差信号を予測する色差信号イントラ予測部とを備え、前記色差信号イントラ予測部は、イントラ輝度予測モードに応じてイントラ色差予測モードを設定するモードにおいて、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モードを示す値を、前記符号化ブロック内の色差信号の予測ブロックのイントラ色差予測モードを示す値に用いることにより、イントラ色差予測モードを設定することを特徴とする受信装置を提供する。
符号化ストリームから、イントラ予測モードに関する情報を復号して、ブロック単位で輝度信号と色差信号とを含む画像信号をイントラ予測復号する受信方法であって、動画像が符号化された符号化データを受信する受信ステップと、前記符号化データをパケット処理して前記符号化ストリームを生成するパケット処理ステップと、前記符号化ストリームから、画像信号を符号化ブロック単位でイントラ予測する際、輝度信号を水平および垂直に分割する分割モードが取得され、色差フォーマットが４：２：０である場合、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モード、第２の輝度信号の予測ブロックのイントラ輝度予測モード、第３の輝度信号の予測ブロックのイントラ輝度予測モード、第４の輝度信号の予測ブロックのイントラ輝度予測モード、第１の輝度信号の予測ブロックと同一の基準位置にある色差信号の予測ブロックのイントラ色差予測モードの順序で予測モードに関する符号化情報が配列された符号化列から、この順序で輝度信号の予測ブロックのイントラ輝度予測モードに関する情報と色差信号の予測ブロックのイントラ色差予測モードに関する情報を復号する符号化列復号ステップと、前記分割モードが設定された場合、前記符号化ブロックの輝度信号を水平および垂直に分割した第１〜第４の輝度信号の予測ブロックを設定して、復号された前記輝度信号の予測ブロック毎のイントラ輝度予測モードに関する情報により得られた各イントラ輝度予測モードに応じて、周囲の復号済みの輝度信号のブロックから輝度信号を予測する輝度信号イントラ予測ステップと、前記分割モードが設定され、色差フォーマットが４：２：０である場合、前記符号化ブロックの色差信号を分割することなく色差信号の予測ブロックを設定して、復号されたイントラ色差予測モードに関する情報により得られたイントラ色差予測モードに応じて、周囲の復号済みの色差信号のブロックから色差信号を予測する色差信号イントラ予測ステップとを有し、前記色差信号イントラ予測ステップにおいて、イントラ輝度予測モードに応じてイントラ色差予測モードを設定するモードにおいて、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モードを示す値を、前記符号化ブロック内の色差信号の予測ブロックのイントラ色差予測モードを示す値に用いることにより、イントラ色差予測モードを設定することを特徴とする受信方法を提供する。
符号化ストリームから、イントラ予測モードに関する情報を復号して、ブロック単位で輝度信号と色差信号とを含む画像信号をイントラ予測復号する受信プログラムであって、動画像が符号化された符号化データを受信する受信ステップと、前記符号化データをパケット処理して前記符号化ストリームを生成するパケット処理ステップと、前記符号化ストリームから、画像信号を符号化ブロック単位でイントラ予測する際、輝度信号を水平および垂直に分割する分割モードが取得され、色差フォーマットが４：２：０である場合、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モード、第２の輝度信号の予測ブロックのイントラ輝度予測モード、第３の輝度信号の予測ブロックのイントラ輝度予測モード、第４の輝度信号の予測ブロックのイントラ輝度予測モード、第１の輝度信号の予測ブロックと同一の基準位置にある色差信号の予測ブロックのイントラ色差予測モードの順序で予測モードに関する符号化情報が配列された符号化列から、この順序で輝度信号の予測ブロックのイントラ輝度予測モードに関する情報と色差信号の予測ブロックのイントラ色差予測モードに関する情報を復号する符号化列復号ステップと、前記分割モードが設定された場合、前記符号化ブロックの輝度信号を水平および垂直に分割した第１〜第４の輝度信号の予測ブロックを設定して、復号された前記輝度信号の予測ブロック毎のイントラ輝度予測モードに関する情報により得られた各イントラ輝度予測モードに応じて、周囲の復号済みの輝度信号のブロックから輝度信号を予測する輝度信号イントラ予測ステップと、前記分割モードが設定され、色差フォーマットが４：２：０である場合、前記符号化ブロックの色差信号を分割することなく色差信号の予測ブロックを設定して、復号されたイントラ色差予測モードに関する情報により得られたイントラ色差予測モードに応じて、周囲の復号済みの色差信号のブロックから色差信号を予測する色差信号イントラ予測ステップとをコンピュータに実行させ、前記色差信号イントラ予測ステップにおいて、イントラ輝度予測モードに応じてイントラ色差予測モードを設定するモードにおいて、前記符号化ブロック内の第１の輝度信号の予測ブロックのイントラ輝度予測モードを示す値を、前記符号化ブロック内の色差信号の予測ブロックのイントラ色差予測モードを示す値に用いることにより、イントラ色差予測モードを設定することを特徴とする受信プログラムを提供する。
An image decoding apparatus that decodes information related to an intra prediction mode and performs intra prediction decoding on an image signal including a luminance signal and a color difference signal in units of blocks , and the luminance signal when performing intra prediction on an encoding block basis When the division mode for horizontally and vertically dividing is acquired and the color difference format is 4: 2: 0, the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block , the second luminance signal The same reference position as the intra luminance prediction mode of the prediction block, the intra luminance prediction mode of the prediction block of the third luminance signal, the intra luminance prediction mode of the prediction block of the fourth luminance signal, and the prediction block of the first luminance signal Code in which encoding information related to the prediction mode is arranged in the order of the intra color difference prediction mode of the prediction block of the color difference signal in From the sequence, when the division mode is set, the encoded sequence decoding unit for decoding the information about the intra luminance prediction mode of the prediction block of the luminance signal and the information about the intra color difference prediction mode of the prediction block of the color difference signal in this order, Obtained from information on the intra luminance prediction mode for each prediction block of the decoded luminance signal by setting prediction blocks of the first to fourth luminance signals obtained by dividing the luminance signal of the encoded block horizontally and vertically. A luminance signal intra prediction unit that predicts a luminance signal from surrounding decoded luminance signal blocks according to each intra luminance prediction mode, and the division mode is set, and the color difference format is 4: 2: 0. , by setting a prediction block of the color difference signals without dividing the color difference signal of the encoding block, the decoded intra A color difference signal intra prediction unit that predicts a color difference signal from a block of surrounding decoded color difference signals according to an intra color difference prediction mode obtained from information on the difference prediction mode, and the color difference signal intra prediction unit includes: in mode for setting the intra chrominance prediction mode according to the brightness prediction modes, a first value indicative of the intra luminance prediction mode of the prediction block of the luminance signal of the encoding block, the prediction of the color difference signal of the encoding block There is provided an image decoding device characterized in that an intra color difference prediction mode is set by using a value indicating an intra color difference prediction mode of a block.
An image decoding method for decoding information related to an intra prediction mode and performing intra prediction decoding on an image signal including a luminance signal and a color difference signal in units of blocks. When performing intra prediction of an image signal in units of encoded blocks , the luminance signal When the division mode for horizontally and vertically dividing is acquired and the color difference format is 4: 2: 0, the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block , the second luminance signal The same reference position as the intra luminance prediction mode of the prediction block, the intra luminance prediction mode of the prediction block of the third luminance signal, the intra luminance prediction mode of the prediction block of the fourth luminance signal, and the prediction block of the first luminance signal Code in which encoding information related to the prediction mode is arranged in the order of the intra color difference prediction mode of the prediction block of the color difference signal in When the division mode is set, the coding sequence decoding step for decoding the information about the intra luminance prediction mode of the prediction block of the luminance signal and the information about the intra color difference prediction mode of the prediction block of the color difference signal in this order from the sequence, Obtained from information on the intra luminance prediction mode for each prediction block of the decoded luminance signal by setting prediction blocks of the first to fourth luminance signals obtained by dividing the luminance signal of the encoded block horizontally and vertically. When the luminance signal intra prediction step for predicting the luminance signal from the surrounding decoded luminance signal block and the division mode are set according to each intra luminance prediction mode, and the color difference format is 4: 2: 0. , by setting a prediction block of the color difference signals without dividing the color difference signal of the encoding block, it is decoded A color difference signal intra prediction step for predicting a color difference signal from a block of surrounding decoded color difference signals according to the intra color difference prediction mode obtained from the information related to the intra color difference prediction mode, and the color difference signal intra prediction step in, in a mode for setting the intra chrominance prediction mode in accordance with the intra brightness prediction modes, a first value indicative of the intra luminance prediction mode of the prediction block of the luminance signal of the encoding block, the color difference between the coded block Provided is an image decoding method characterized by setting an intra color difference prediction mode by using it as a value indicating an intra color difference prediction mode of a prediction block of a signal.
An image decoding program that decodes information related to an intra prediction mode and performs intra prediction decoding of an image signal including a luminance signal and a color difference signal in units of blocks. When performing intra prediction of an image signal in units of encoded blocks , the luminance signal When the division mode for horizontally and vertically dividing is acquired and the color difference format is 4: 2: 0, the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block , the second luminance signal The same reference position as the intra luminance prediction mode of the prediction block, the intra luminance prediction mode of the prediction block of the third luminance signal, the intra luminance prediction mode of the prediction block of the fourth luminance signal, and the prediction block of the first luminance signal The coding information related to the prediction mode is arranged in the order of the intra color difference prediction mode of the prediction block of the color difference signal in FIG. An encoding sequence decoding step for decoding information on the intra luminance prediction mode of the prediction block of the luminance signal and information on the intra color difference prediction mode of the prediction block of the chrominance signal in this order from the encoding sequence, and the division mode are set. In this case, the prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the coding block horizontally and vertically is set, and information about the intra luminance prediction mode for each prediction block of the decoded luminance signal is used. In accordance with each obtained intra luminance prediction mode, a luminance signal intra prediction step for predicting a luminance signal from a block of surrounding decoded luminance signals and the division mode are set, and the color difference format is 4: 2: 0. in some cases, by setting a prediction block of the color difference signals without dividing the color difference signal of the coded block, A color difference signal intra prediction step for predicting a color difference signal from a block of surrounding decoded color difference signals according to the intra color difference prediction mode obtained from the information about the intra color difference prediction mode that is In the signal intra prediction step, in the mode in which the intra color difference prediction mode is set according to the intra luminance prediction mode, a value indicating the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block is encoded. by using the value indicating the intra chrominance prediction mode of the prediction block of the color difference signals in the block, to provide an image decoding program and sets the intra chrominance prediction mode.
A receiving device that decodes information related to an intra prediction mode from an encoded stream and performs intra prediction decoding on an image signal including a luminance signal and a color difference signal in units of blocks, and includes encoded data obtained by encoding a moving image. A receiving unit that receives the packet, a packet processing unit that packet-processes the encoded data to generate the encoded stream, and a horizontal luminance signal when performing intra prediction of an image signal in units of encoded blocks from the encoded stream. And when the color difference format is 4: 2: 0, the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block , and the prediction of the second luminance signal are obtained. Block intra luminance prediction mode, third luminance signal prediction block intra luminance prediction mode, fourth luminance signal prediction block From the coded sequence in which coding information related to the prediction mode is arranged in the order of the intra color difference prediction mode of the prediction block of the color difference signal at the same reference position as the prediction block of the first luminance signal, In this order, an encoded sequence decoding unit that decodes information related to the intra luminance prediction mode of the prediction block of the luminance signal and information related to the intra color difference prediction mode of the prediction block of the color difference signal, and the encoding when the division mode is set . By setting prediction blocks of the first to fourth luminance signals obtained by dividing the luminance signal of the block horizontally and vertically, each intra obtained by information on the intra luminance prediction mode for each prediction block of the decoded luminance signal A luminance signal input that predicts the luminance signal from a block of surrounding decoded luminance signals, depending on the luminance prediction mode. And La prediction unit, the division mode is set, the color difference format is 4: 2: 0, and sets the prediction block of the color difference signals without dividing the color difference signal of the encoding block, the decoded intra A color difference signal intra prediction unit that predicts a color difference signal from a block of surrounding decoded color difference signals according to an intra color difference prediction mode obtained from information regarding the color difference prediction mode, and the color difference signal intra prediction unit includes: in mode for setting the intra chrominance prediction mode according to the brightness prediction modes, a first value indicative of the intra luminance prediction mode of the prediction block of the luminance signal of the encoding block, the prediction of the color difference signal of the encoding block The intra color difference prediction mode is set by using it as a value indicating the intra color difference prediction mode of the block. A receiving device is provided.
A receiving method for decoding intra-prediction mode information from an encoded stream and intra-predicting an image signal including a luminance signal and a color difference signal in units of blocks, wherein encoded data obtained by encoding a moving image is encoded A reception step of receiving, a packet processing step of packet-processing the encoded data to generate the encoded stream, and a luminance signal when horizontally predicting an image signal in units of encoded blocks from the encoded stream. And when the color difference format is 4: 2: 0, the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block , and the prediction of the second luminance signal are obtained. Block intra luminance prediction mode, third luminance signal prediction block intra luminance prediction mode, fourth luminance signal Coding sequence in which coding information relating to the prediction mode is arranged in the order of the intra-brightness prediction mode of the prediction block and the intra-color-difference prediction mode of the prediction block of the color-difference signal at the same reference position as the prediction block of the first luminance signal In this order, when the division mode is set, the coded sequence decoding step for decoding the information about the intra luminance prediction mode of the prediction block of the luminance signal and the information about the intra color difference prediction mode of the prediction block of the chrominance signal, The prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the encoded block horizontally and vertically is set, and obtained from information on the intra luminance prediction mode for each prediction block of the decoded luminance signal Depending on each intra luminance prediction mode, the luminance signal is predicted from the surrounding decoded luminance signal block. A luminance signal intra prediction step of the division mode is set, the color difference format is 4: 2: 0, and sets the prediction block of the color difference signals without dividing the color difference signal of the encoding block, decoding A color difference signal intra prediction step for predicting a color difference signal from a block of surrounding decoded color difference signals according to the intra color difference prediction mode obtained from the information about the intra color difference prediction mode performed, and the color difference signal intra prediction in step, the mode for setting the intra chrominance prediction mode in accordance with the intra brightness prediction modes, a first value indicative of the intra luminance prediction mode of the prediction block of the luminance signal of the encoding block, the coded block By using the value indicating the intra color difference prediction mode of the prediction block of the color difference signal And a reception method characterized by setting an intra color difference prediction mode.
A reception program for decoding intra-prediction mode information from an encoded stream and performing intra-prediction decoding on an image signal including a luminance signal and a color difference signal in units of blocks, wherein encoded data obtained by encoding a moving image is encoded A reception step of receiving, a packet processing step of packet-processing the encoded data to generate the encoded stream, and a luminance signal when horizontally predicting an image signal in units of encoded blocks from the encoded stream. And when the color difference format is 4: 2: 0, the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block , and the prediction of the second luminance signal are obtained. Block intra luminance prediction mode, third luminance signal prediction block intra luminance prediction mode, fourth Code in which coding information relating to the prediction mode is arranged in the order of the intra luminance prediction mode of the prediction block of the degree signal and the intra color difference prediction mode of the prediction block of the color difference signal at the same reference position as the prediction block of the first luminance signal An encoded sequence decoding step for decoding information on the intra luminance prediction mode of the prediction block of the luminance signal and information on the intra color difference prediction mode of the prediction block of the chrominance signal in this order, and the division mode is set in this order The prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the coding block horizontally and vertically is set, and obtained by information on the intra luminance prediction mode for each prediction block of the decoded luminance signal. Depending on each received intra luminance prediction mode, the luminance signal from the surrounding decoded luminance signal block A luminance signal intra prediction step for predicting, the division mode is set, the color difference format is 4: 2: 0, and sets the prediction block of the color difference signals without dividing the color difference signal of the encoding block The computer executes a color difference signal intra prediction step for predicting a color difference signal from a block of surrounding decoded color difference signals according to the intra color difference prediction mode obtained from information on the decoded intra color difference prediction mode, and In the color difference signal intra prediction step, in the mode in which the intra color difference prediction mode is set according to the intra luminance prediction mode, a value indicating the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block is set to the code Intra color difference prediction mode of the color difference signal prediction block in the generalized block By using it for the indicated value, a receiving program characterized by setting an intra color difference prediction mode is provided.

Claims

An image decoding apparatus that decodes information related to an intra prediction mode and performs intra prediction decoding of an image signal including a luminance signal and a color difference signal in units of blocks,
When the image signal is intra-predicted in units of coding blocks , when a division mode for dividing the luminance signal horizontally and vertically is acquired and the color difference format is 4: 2: 0, the first luminance in the coding block Intra luminance prediction mode of the prediction block of the signal, Intra luminance prediction mode of the prediction block of the second luminance signal, Intra luminance prediction mode of the prediction block of the third luminance signal, Intra luminance prediction of the prediction block of the fourth luminance signal Luminance signal in this order from the coding sequence in which the coding information related to the prediction mode is arranged in the order of the intra color difference prediction mode of the prediction block of the color difference signal at the same reference position as the mode and the prediction block of the first luminance signal Information on Intra-Luminance Prediction Mode of Prediction Blocks and Intra-chrominance Prediction Mode of Prediction Blocks of Color Difference Signals A coding sequence decoding unit for decoding the broadcast,
When the division mode is set, the prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the coding block horizontally and vertically is set, and the decoded luminance signal for each prediction block is set. A luminance signal intra prediction unit that predicts a luminance signal from a block of surrounding decoded luminance signals according to each intra luminance prediction mode obtained from information on the intra luminance prediction mode;
The split mode is set, the color difference format is 4: 2: 0, the information to set the prediction block of the color difference signals without dividing the color difference signal of the encoding block, about the decoded intra chrominance prediction mode A color difference signal intra prediction unit that predicts a color difference signal from a block of surrounding decoded color difference signals according to the intra color difference prediction mode obtained by
The color difference signal intra prediction unit sets a value indicating the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block in a mode in which the intra color difference prediction mode is set according to the intra luminance prediction mode. An image decoding device, wherein an intra color difference prediction mode is set by using a value indicating an intra color difference prediction mode of a prediction block of a color difference signal in a coding block .

An image decoding method for decoding information on an intra prediction mode and performing intra prediction decoding on an image signal including a luminance signal and a color difference signal in units of blocks,
When the image signal is intra-predicted in units of coding blocks , when a division mode for dividing the luminance signal horizontally and vertically is acquired and the color difference format is 4: 2: 0, the first luminance in the coding block Intra luminance prediction mode of the prediction block of the signal, Intra luminance prediction mode of the prediction block of the second luminance signal, Intra luminance prediction mode of the prediction block of the third luminance signal, Intra luminance prediction of the prediction block of the fourth luminance signal Luminance signal in this order from the coding sequence in which the coding information related to the prediction mode is arranged in the order of the intra color difference prediction mode of the prediction block of the color difference signal at the same reference position as the mode and the prediction block of the first luminance signal Information on Intra-Luminance Prediction Mode of Prediction Blocks and Intra-chrominance Prediction Mode of Prediction Blocks of Color Difference Signals A coding sequence decoding step of decoding the broadcast,
When the division mode is set, the prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the coding block horizontally and vertically is set, and the decoded luminance signal for each prediction block is set. A luminance signal intra prediction step for predicting a luminance signal from a block of surrounding decoded luminance signals according to each intra luminance prediction mode obtained by information on the intra luminance prediction mode;
The split mode is set, the color difference format is 4: 2: 0, the information to set the prediction block of the color difference signals without dividing the color difference signal of the encoding block, about the decoded intra chrominance prediction mode A color difference signal intra prediction step for predicting a color difference signal from a block of surrounding decoded color difference signals according to the intra color difference prediction mode obtained by
In the color difference signal intra prediction step, in the mode for setting the intra color difference prediction mode according to the intra luminance prediction mode, a value indicating the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block is set as the value. An image decoding method comprising: setting an intra color difference prediction mode by using a value indicating an intra color difference prediction mode of a prediction block of a color difference signal in a coding block .

An image decoding program that decodes information related to an intra prediction mode and performs intra prediction decoding of an image signal including a luminance signal and a color difference signal in units of blocks,
When the image signal is intra-predicted in units of coding blocks , when a division mode for dividing the luminance signal horizontally and vertically is acquired and the color difference format is 4: 2: 0, the first luminance in the coding block Intra luminance prediction mode of the prediction block of the signal, Intra luminance prediction mode of the prediction block of the second luminance signal, Intra luminance prediction mode of the prediction block of the third luminance signal, Intra luminance prediction of the prediction block of the fourth luminance signal Luminance signal in this order from the coding sequence in which the coding information related to the prediction mode is arranged in the order of the intra color difference prediction mode of the prediction block of the color difference signal at the same reference position as the mode and the prediction block of the first luminance signal Information on Intra-Luminance Prediction Mode of Prediction Blocks and Intra-chrominance Prediction Mode of Prediction Blocks of Color Difference Signals A coding sequence decoding step of decoding the broadcast,
When the division mode is set, the prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the coding block horizontally and vertically is set, and the decoded luminance signal for each prediction block is set. A luminance signal intra prediction step for predicting a luminance signal from a block of surrounding decoded luminance signals according to each intra luminance prediction mode obtained by information on the intra luminance prediction mode;
The split mode is set, the color difference format is 4: 2: 0, the information to set the prediction block of the color difference signals without dividing the color difference signal of the encoding block, about the decoded intra chrominance prediction mode According to the intra color difference prediction mode obtained by the above, the computer executes a color difference signal intra prediction step for predicting a color difference signal from a block of surrounding decoded color difference signals, and
In the color difference signal intra prediction step, in the mode for setting the intra color difference prediction mode according to the intra luminance prediction mode, a value indicating the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block is set as the value. An image decoding program that sets an intra color difference prediction mode by using it as a value indicating an intra color difference prediction mode of a prediction block of a color difference signal in a coding block .

A reception device that decodes information related to an intra prediction mode from an encoded stream and performs intra prediction decoding of an image signal including a luminance signal and a color difference signal in units of blocks,
A receiving unit that receives encoded data in which a moving image is encoded;
A packet processing unit that packet-processes the encoded data to generate the encoded stream;
From the encoded stream, when the intra prediction image signal in the coding block is acquired split mode to split the luminance signal horizontally and vertically, the color difference format is 4: 2: 0, the coding block Of the prediction blocks of the first luminance signal, the intra luminance prediction mode of the prediction block of the second luminance signal, the intra luminance prediction mode of the prediction block of the third luminance signal, and the fourth luminance signal From the encoded sequence in which the encoding information regarding the prediction mode is arranged in the order of the intra luminance prediction mode of the prediction block and the intra color difference prediction mode of the prediction block of the color difference signal at the same reference position as the prediction block of the first luminance signal In this order, information on the intra luminance prediction mode of the prediction block of the luminance signal and the input of the prediction block of the color difference signal A coding sequence decoding unit for decoding the information about the La chrominance prediction mode,
When the division mode is set, the prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the coding block horizontally and vertically is set, and the decoded luminance signal for each prediction block is set. A luminance signal intra prediction unit that predicts a luminance signal from a block of surrounding decoded luminance signals according to each intra luminance prediction mode obtained from information on the intra luminance prediction mode;
The split mode is set, the color difference format is 4: 2: 0, the information to set the prediction block of the color difference signals without dividing the color difference signal of the encoding block, about the decoded intra chrominance prediction mode A color difference signal intra prediction unit that predicts a color difference signal from a block of surrounding decoded color difference signals according to the intra color difference prediction mode obtained by
The color difference signal intra prediction unit sets a value indicating the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block in a mode in which the intra color difference prediction mode is set according to the intra luminance prediction mode. A receiving device, wherein an intra color difference prediction mode is set by using a value indicating an intra color difference prediction mode of a prediction block of a color difference signal in a coding block .

A reception method for decoding intra-prediction mode information from an encoded stream and intra-prediction decoding an image signal including a luminance signal and a color difference signal in units of blocks,
A reception step of receiving encoded data in which a moving image is encoded;
A packet processing step of packet-processing the encoded data to generate the encoded stream;
From the encoded stream, when the intra prediction image signal in the coding block is acquired split mode to split the luminance signal horizontally and vertically, the color difference format is 4: 2: 0, the coding block Of the prediction blocks of the first luminance signal, the intra luminance prediction mode of the prediction block of the second luminance signal, the intra luminance prediction mode of the prediction block of the third luminance signal, and the fourth luminance signal From the encoded sequence in which the encoding information regarding the prediction mode is arranged in the order of the intra luminance prediction mode of the prediction block and the intra color difference prediction mode of the prediction block of the color difference signal at the same reference position as the prediction block of the first luminance signal In this order, information on the intra luminance prediction mode of the prediction block of the luminance signal and the input of the prediction block of the color difference signal A coding sequence decoding step of decoding information about La chrominance prediction mode,
When the division mode is set, the prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the coding block horizontally and vertically is set, and the decoded luminance signal for each prediction block is set. A luminance signal intra prediction step for predicting a luminance signal from a block of surrounding decoded luminance signals according to each intra luminance prediction mode obtained from information on the intra luminance prediction mode, and the division mode are set, and a color difference format Is 4: 2: 0, the color difference signal prediction block is set without dividing the color difference signal of the coding block , and the intra color difference prediction mode obtained by the information on the decoded intra color difference prediction mode is set. And a color difference signal intra prediction step for predicting a color difference signal from a block of the surrounding decoded color difference signals. Have
In the color difference signal intra prediction step, in the mode for setting the intra color difference prediction mode according to the intra luminance prediction mode, a value indicating the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block is set as the value. A receiving method, wherein an intra color difference prediction mode is set by using a value indicating an intra color difference prediction mode of a prediction block of a color difference signal in a coding block .

A reception program that decodes information about an intra prediction mode from an encoded stream and performs intra prediction decoding of an image signal including a luminance signal and a color difference signal in units of blocks,
A reception step of receiving encoded data in which a moving image is encoded;
A packet processing step of packet-processing the encoded data to generate the encoded stream;
From the encoded stream, when the intra prediction image signal in the coding block is acquired split mode to split the luminance signal horizontally and vertically, the color difference format is 4: 2: 0, the coding block Of the prediction blocks of the first luminance signal, the intra luminance prediction mode of the prediction block of the second luminance signal, the intra luminance prediction mode of the prediction block of the third luminance signal, and the fourth luminance signal From the encoded sequence in which the encoding information regarding the prediction mode is arranged in the order of the intra luminance prediction mode of the prediction block and the intra color difference prediction mode of the prediction block of the color difference signal at the same reference position as the prediction block of the first luminance signal In this order, information on the intra luminance prediction mode of the prediction block of the luminance signal and the input of the prediction block of the color difference signal A coding sequence decoding step of decoding information about La chrominance prediction mode,
When the division mode is set, the prediction block of the first to fourth luminance signals obtained by dividing the luminance signal of the coding block horizontally and vertically is set, and the decoded luminance signal for each prediction block is set. A luminance signal intra prediction step for predicting a luminance signal from a block of surrounding decoded luminance signals according to each intra luminance prediction mode obtained from information on the intra luminance prediction mode, and the division mode are set, and a color difference format Is 4: 2: 0, the color difference signal prediction block is set without dividing the color difference signal of the coding block , and the intra color difference prediction mode obtained by the information on the decoded intra color difference prediction mode is set. And a color difference signal intra prediction step for predicting a color difference signal from a block of the surrounding decoded color difference signals. Let the computer run,
In the color difference signal intra prediction step, in the mode for setting the intra color difference prediction mode according to the intra luminance prediction mode, a value indicating the intra luminance prediction mode of the prediction block of the first luminance signal in the coding block is set as the value. A reception program that sets an intra color difference prediction mode by using it as a value indicating an intra color difference prediction mode of a prediction block of a color difference signal in a coding block .