JP2013207499A5

JP2013207499A5 -

Info

Publication number: JP2013207499A5
Application number: JP2012073575A
Authority: JP
Filing date: 2012-03-28
Publication date: 2014-07-03
Anticipated expiration: 2032-03-28

Description

画像を復号すると共に、前記画像を分割した量子化パラメータの管理単位である量子化復号ブロック単位で差分量子化パラメータが符号化されたビットストリームを復号する画像復号装置であって、前記ビットストリームを前記量子化復号ブロック単位で復号して復号対象の量子化復号ブロックの差分量子化パラメータを抽出する復号部と、前記復号対象の量子化復号ブロックに対して復号順で先行する２つの量子化復号ブロックの量子化パラメータを用いて予測量子化パラメータを導出する予測量子化パラメータ導出部と、前記復号対象の量子化復号ブロックの差分量子化パラメータと前記予測量子化パラメータとの加算により前記復号対象の量子化復号ブロックの量子化パラメータを導出する量子化パラメータ導出部とを備えることを特徴とする画像復号装置を提供する。
画像を復号すると共に、前記画像を分割した量子化パラメータの管理単位である量子化復号ブロック単位で差分量子化パラメータが符号化されたビットストリームを復号する画像復号方法であって、前記ビットストリームを前記量子化復号ブロック単位で復号して復号対象の量子化復号ブロックの差分量子化パラメータを抽出する復号ステップと、前記復号対象の量子化復号ブロックに対して復号順で先行する２つの量子化復号ブロックの量子化パラメータを用いて予測量子化パラメータを導出する予測量子化パラメータ導出ステップと、前記復号対象の量子化復号ブロックの差分量子化パラメータと前記予測量子化パラメータとの加算により前記復号対象の量子化復号ブロックの量子化パラメータを導出する量子化パラメータ導出ステップとを有することを特徴とする画像復号方法を提供する。
画像を復号すると共に、前記画像を分割した量子化パラメータの管理単位である量子化復号ブロック単位で差分量子化パラメータが符号化されたビットストリームを復号する画像復号プログラムであって、前記ビットストリームを前記量子化復号ブロック単位で復号して復号対象の量子化復号ブロックの差分量子化パラメータを抽出する復号ステップと、前記復号対象の量子化復号ブロックに対して復号順で先行する２つの量子化復号ブロックの量子化パラメータを用いて予測量子化パラメータを導出する予測量子化パラメータ導出ステップと、前記復号対象の量子化復号ブロックの差分量子化パラメータと前記予測量子化パラメータとの加算により前記復号対象の量子化復号ブロックの量子化パラメータを導出する量子化パラメータ導出ステップとをコンピュータに実行させることを特徴とする画像復号プログラムを提供する。
ビットストリームを受信して復号する受信装置であって、画像と共に前記画像を分割した量子化パラメータの管理単位である量子化復号ブロック単位で差分量子化パラメータが符号化されたビットストリームが、パケット化された符号化ストリームを受信する受信部と、受信された前記パケット化された符号化ストリームをパケット処理して元のビットストリームを復元する復元部と、前記復元されたビットストリームを前記量子化復号ブロック単位で復号して復号対象の量子化復号ブロックの差分量子化パラメータを抽出する復号部と、前記復号対象の量子化復号ブロックに対して復号順で先行する２つの量子化復号ブロックの量子化パラメータを用いて予測量子化パラメータを導出する予測量子化パラメータ導出部と、前記復号対象の量子化復号ブロックの差分量子化パラメータと前記予測量子化パラメータとの加算により前記復号対象の量子化復号ブロックの量子化パラメータを導出する量子化パラメータ導出部とを備えることを特徴とする受信装置を提供する。
ビットストリームを受信して復号する受信方法であって、画像と共に前記画像を分割した量子化パラメータの管理単位である量子化復号ブロック単位で差分量子化パラメータが符号化されたビットストリームが、パケット化された符号化ストリームを受信する受信ステップと、受信された前記パケット化された符号化ストリームをパケット処理して元のビットストリームを復元する復元ステップと、前記復元されたビットストリームを前記量子化復号ブロック単位で復号して復号対象の量子化復号ブロックの差分量子化パラメータを抽出する復号ステップと、前記復号対象の量子化復号ブロックに対して復号順で先行する２つの量子化復号ブロックの量子化パラメータを用いて予測量子化パラメータを導出する予測量子化パラメータ導出ステップと、前記復号対象の量子化復号ブロックの差分量子化パラメータと前記予測量子化パラメータとの加算により前記復号対象の量子化復号ブロックの量子化パラメータを導出する量子化パラメータ導出ステップとを有することを特徴とする受信方法を提供する。
ビットストリームを受信して復号する受信プログラムであって、画像と共に前記画像を分割した量子化パラメータの管理単位である量子化復号ブロック単位で差分量子化パラメータが符号化されたビットストリームが、パケット化された符号化ストリームを受信する受信ステップと、受信された前記パケット化された符号化ストリームをパケット処理して元のビットストリームを復元する復元ステップと、前記復元されたビットストリームを前記量子化復号ブロック単位で復号して復号対象の量子化復号ブロックの差分量子化パラメータを抽出する復号ステップと、前記復号対象の量子化復号ブロックに対して復号順で先行する２つの量子化復号ブロックの量子化パラメータを用いて予測量子化パラメータを導出する予測量子化パラメータ導出ステップと、前記復号対象の量子化復号ブロックの差分量子化パラメータと前記予測量子化パラメータとの加算により前記復号対象の量子化復号ブロックの量子化パラメータを導出する量子化パラメータ導出ステップとをコンピュータに実行させ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 for decoding a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a unit for managing a quantization parameter obtained by dividing the image, the image decoding apparatus comprising: A decoding unit that performs decoding in units of the quantized decoding block and extracts a differential quantization parameter of the quantization decoding block to be decoded; and two quantization decodings that precede the decoding target quantization decoding block in decoding order A predictive quantization parameter deriving unit for deriving a predictive quantization parameter using a quantization parameter of the block; and adding the difference quantization parameter and the predictive quantization parameter of the quantization decoding block to be decoded to determine the decoding target A quantization parameter deriving unit for deriving the quantization parameter of the quantization decoding block. To provide an image decoding apparatus according to.
An image decoding method for decoding a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a quantization parameter management unit obtained by dividing the image, wherein the bitstream is decoded A decoding step of decoding in units of the quantized decoding block and extracting a differential quantization parameter of the quantized decoding block to be decoded; and two quantizing decoding preceding the quantized decoding block to be decoded in decoding order A predictive quantization parameter deriving step for deriving a predictive quantization parameter using a quantization parameter of the block; and addition of the differential quantization parameter of the quantization decoding block to be decoded and the predictive quantization parameter Quantization parameter deriving step for deriving the quantization parameter of the quantized decoding block To provide an image decoding method characterized by having a.
An image decoding program that decodes a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block that is a quantization parameter management unit obtained by dividing the image. A decoding step of decoding in units of the quantized decoding block and extracting a differential quantization parameter of the quantized decoding block to be decoded; and two quantizing decoding preceding the quantized decoding block to be decoded in decoding order A predictive quantization parameter deriving step for deriving a predictive quantization parameter using a quantization parameter of the block; and addition of the differential quantization parameter of the quantization decoding block to be decoded and the predictive quantization parameter Quantization parameter derivation module for deriving quantization parameters for quantization decoding block To provide an image decoding program for causing to execute a-up the computer.
A receiving device that receives and decodes a bitstream, and a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a quantization parameter management unit obtained by dividing the image together with the image, is packetized A receiving unit that receives the encoded stream, a restoration unit that processes the received packetized encoded stream to restore the original bit stream, and the quantization decoding of the restored bit stream A decoding unit that decodes in block units and extracts a differential quantization parameter of a quantization decoding block to be decoded, and quantization of two quantization decoding blocks that precede the decoding decoding target quantization decoding block in decoding order A predictive quantization parameter deriving unit for deriving a predictive quantization parameter using a parameter, and the amount of the decoding target And a quantization parameter deriving unit for deriving the quantization parameter of the quantization decoding block to be decoded by adding the difference quantization parameter of the quantization decoding block and the prediction quantization parameter. To do.
A reception method for receiving and decoding a bitstream, wherein a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a quantization parameter management unit obtained by dividing the image together with the image, is packetized. A receiving step for receiving the encoded stream, a restoration step for processing the received packetized encoded stream to restore the original bit stream, and the quantization decoding of the restored bit stream A decoding step of decoding in block units and extracting a differential quantization parameter of a quantization decoding block to be decoded; and quantization of two quantization decoding blocks preceding the decoding decoding target quantization decoding block Predictive quantization parameter deriving step for deriving predictive quantization parameter using parameters And a quantization parameter derivation step for deriving the quantization parameter of the quantization decoding block to be decoded by adding the difference quantization parameter of the quantization decoding block to be decoded and the prediction quantization parameter. A receiving method is provided.
A reception program for receiving and decoding a bitstream, wherein a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a quantization parameter management unit obtained by dividing the image together with the image, is packetized. A receiving step for receiving the encoded stream, a restoration step for processing the received packetized encoded stream to restore the original bit stream, and the quantization decoding of the restored bit stream A decoding step of decoding in block units and extracting a differential quantization parameter of a quantization decoding block to be decoded; and quantization of two quantization decoding blocks preceding the decoding decoding target quantization decoding block Predictive quantization parameter derivation using parameters to derive predictive quantization parameters And a quantization parameter deriving step of deriving a quantization parameter of the quantization decoding block to be decoded by adding the difference quantization parameter of the quantization decoding block to be decoded and the prediction quantization parameter to the computer A receiving program characterized by being executed is provided.

Claims

An image decoding apparatus that decodes a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block that is a unit for managing quantization parameters obtained by dividing the image,
A decoding unit that decodes the bitstream in units of the quantized decoding block and extracts a differential quantization parameter of a quantization decoding block to be decoded;
A predictive quantization parameter derivation unit for deriving a predictive quantization parameter using the quantization parameters of two quantization decoding blocks preceding the quantization decoding block to be decoded in decoding order;
A quantization parameter deriving unit that derives a quantization parameter of the quantization decoding block to be decoded by adding the differential quantization parameter of the quantization decoding block to be decoded and the prediction quantization parameter; An image decoding device.

The predictive quantization parameter deriving unit derives, as the predictive quantization parameter, an average value of quantization parameters of two quantization decoding blocks preceding the quantization decoding block to be decoded in decoding order. The image decoding apparatus according to claim 1.

2. The quantization decoding block unit is a maximum decoding block obtained by dividing the image, or the maximum decoding block further divided into one or a plurality of quantization decoding blocks. Or the image decoding apparatus of 2.

The predictive quantization parameter derivation unit derives the predictive quantization parameter using the quantization parameters of the two preceding quantization decoding blocks in the decoding order with respect to the quantization decoding block to be decoded. The image decoding device according to any one of claims 1 to 3.

An image decoding method for decoding a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a quantization parameter management unit obtained by dividing the image,
A decoding step of decoding the bit stream in units of the quantized decoding block and extracting a differential quantization parameter of a quantization decoding block to be decoded;
A predictive quantization parameter derivation step for deriving a predictive quantization parameter using the quantization parameters of two quantization decoding blocks preceding the quantization decoding block to be decoded in decoding order;
A quantization parameter deriving step of deriving a quantization parameter of the quantization decoding block to be decoded by adding the differential quantization parameter of the quantization decoding block to be decoded and the prediction quantization parameter; Image decoding method.

An image decoding program for decoding a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a quantization parameter management unit obtained by dividing the image,
A decoding step of decoding the bit stream in units of the quantized decoding block and extracting a differential quantization parameter of a quantization decoding block to be decoded;
A predictive quantization parameter derivation step for deriving a predictive quantization parameter using the quantization parameters of two quantization decoding blocks preceding the quantization decoding block to be decoded in decoding order;
Causing a computer to execute a quantization parameter deriving step of deriving a quantization parameter of the quantization decoding block to be decoded by adding the differential quantization parameter of the quantization decoding block to be decoded and the prediction quantization parameter. An image decoding program characterized by the above.

A receiving device that receives and decodes a bitstream,
A bit stream in which a differential quantization parameter is encoded in units of quantization decoding blocks, which are quantization parameter management units obtained by dividing the image together with the image, and a reception unit that receives the packetized encoded stream;
A restoration unit that packet-processes the received packetized encoded stream to restore the original bitstream;
A decoding unit that decodes the restored bitstream in units of the quantization decoding block and extracts a differential quantization parameter of a quantization decoding block to be decoded;
A predictive quantization parameter derivation unit for deriving a predictive quantization parameter using the quantization parameters of two quantization decoding blocks preceding the quantization decoding block to be decoded in decoding order;
A quantization parameter deriving unit that derives a quantization parameter of the quantization decoding block to be decoded by adding the differential quantization parameter of the quantization decoding block to be decoded and the prediction quantization parameter; Receiving device.

A receiving method for receiving and decoding a bitstream,
A reception step of receiving a packetized encoded stream in which a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a quantization parameter management unit obtained by dividing the image together with the image;
A restoration step of packetizing the received packetized encoded stream to restore the original bitstream;
A decoding step of decoding the restored bitstream in units of the quantization decoding block and extracting a differential quantization parameter of a quantization decoding block to be decoded;
A predictive quantization parameter derivation step for deriving a predictive quantization parameter using the quantization parameters of two quantization decoding blocks preceding the quantization decoding block to be decoded in decoding order;
A quantization parameter deriving step of deriving a quantization parameter of the quantization decoding block to be decoded by adding the differential quantization parameter of the quantization decoding block to be decoded and the prediction quantization parameter; To receive.

A receiving program for receiving and decoding a bitstream,
A reception step of receiving a packetized encoded stream in which a bitstream in which a differential quantization parameter is encoded in units of a quantization decoding block, which is a quantization parameter management unit obtained by dividing the image together with the image;
A restoration step of packetizing the received packetized encoded stream to restore the original bitstream;
A decoding step of decoding the restored bitstream in units of the quantization decoding block and extracting a differential quantization parameter of a quantization decoding block to be decoded;
A predictive quantization parameter derivation step for deriving a predictive quantization parameter using the quantization parameters of two quantization decoding blocks preceding the quantization decoding block to be decoded in decoding order;
Causing a computer to execute a quantization parameter deriving step of deriving a quantization parameter of the quantization decoding block to be decoded by adding the differential quantization parameter of the quantization decoding block to be decoded and the prediction quantization parameter. A receiving program characterized by the above.