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US 12,739,406 B2Granted
Device and method of video encoding with first and second encoding code
AssigneePanasonic Intellectual Property Corporation of America
InventorsHideyuki Ohgose, Kiyofumi Abe, Hiroshi Arakawa, Tatsuro Juri, Kazuhito Kimura
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Abstract
A video image encoding device, in a first mode, variable-length-encodes a residual coefficient to generate a coefficient code string, outputs the coefficient code string and the header information in a state in which the header information is associated with the coefficient code string, in a second mode, directly uses a differential image as a coefficient code string without variable-length-encoding the differential image, and outputs the coefficient code string and the header information in a state in which the header information is associated with the coefficient code string.
Claims5
An image encoding device that encodes an image, the image encoding device comprising:
- a processor;
- and
- a non-transitory memory having stored thereon executable instructions, which cause the processor to:
- generate a predictive image on a predictive unit for a current coding unit using predictive information, the prediction unit being included in the coding unit;
- and
- wherein in a first mode, the processor variable-length-codes a residual coefficient to generate a coefficient code string, the residual coefficient being generated by performing an orthogonal transformation process and a quantizing process on a differential image between the image to be encoded and the generated predictive image,
- wherein in a second mode, the processor directly uses the differential image to generate the coefficient code string without performing the orthogonal transformation process and the quantizing process, and
- wherein a syntax of the current coding unit includes flag information indicating whether the first mode or the second mode is applied for the current coding unit and the syntax is included in a syntax of the coding unit separate from a syntax of the prediction unit included in the syntax of the coding unit, and
- wherein whether it is in the first mode or the second mode is based on a flag.
6 more elements
An image encoding method that encodes an image, the image encoding method comprising:
- generating a predictive image on a predictive unit for a current coding unit using predictive information, the prediction unit being included in the coding unit;
- and
- wherein in a first mode, variable-length-coding a residual coefficient to generate a coefficient code string, the residual coefficient being generated by performing an orthogonal transformation process and a quantizing process on a differential image between the image to be encoded and the generated predictive image,
- wherein in a second mode, directly using the differential image to generate the coefficient code string without performing the orthogonal transformation process and the quantizing process, and
- wherein a syntax of the current coding unit includes flag information indicating whether the first mode or the second mode is applied for the current coding unit and the syntax is included in a syntax of the coding unit separate from a syntax of the prediction unit included in the syntax of the coding unit, and
- wherein whether it is in the first mode or the second mode is based on a flag.
3 more elements
An image decoding device that decodes an encoded image, the image decoding device comprising:
- a processor;
- and
- a non-transitory memory having stored thereon executable instructions, which cause the processor to:
- generate a predictive image on a predictive unit for a current coding unit using predictive information, the prediction unit being included in the coding unit;
- and
- wherein in a first mode, the processor variable-length-decodes a coefficient code string to output a residual coefficient and performs an inverse quantizing process and an inverse orthogonal transformation process on the residual coefficient to output a residual decoded image, the residual decoded image is a differential image between the image to be decoded and the generated predictive image,
- wherein in a second mode, the processor directly uses the coefficient code string to output the differential image without performing the inverse quantizing process and the orthogonal transformation process, and
- wherein a syntax of the current coding unit includes flag information indicating whether the first mode or the second mode is applied for the current coding unit and the syntax is included in a syntax of the coding unit separate from a syntax of the prediction unit included in the syntax of the coding unit, and
- wherein whether it is in the first mode or the second mode is based on a flag.
6 more elements
An image decoding method that decodes an encoded image, the image decoding method comprising:
- generating a predictive image on a predictive unit for a current coding unit using predictive information, the prediction unit being included in the coding unit;
- and
- wherein in a first mode, variable-length-decoding a coefficient code string to output a residual coefficient and performing an inverse quantizing process and an inverse orthogonal transformation process on the residual coefficient to output a residual decoded image, the residual decoded image is a differential image between the image to be decoded and the generated predictive image,
- wherein in a second mode, directly using the coefficient code string to output the differential image without performing the inverse quantizing process and the orthogonal transformation process, and
- wherein a syntax of the current coding unit includes flag information indicating whether the first mode or the second mode is applied for the current coding unit and the syntax is included in a syntax of the coding unit separate from a syntax of the prediction unit included in the syntax of the coding unit, and
- wherein whether it is in the first mode or the second mode is based on a flag.
3 more elements
A non-transitory computer readable medium storing a bitstream, the bitstream including an encoded signal and syntax information according to which a decoder performs a method comprising:
- generating a predictive image on a predictive unit for a current coding unit using predictive information, the prediction unit being included in the coding unit;
- and
- wherein in a first mode, variable-length-decoding a coefficient code string to output a residual coefficient and performing an inverse quantizing process and an inverse orthogonal transformation process on the residual coefficient to output a residual decoded image, the residual decoded image is a differential image between the image to be decoded and the generated predictive image,
- wherein in a second mode, directly using the coefficient code string to output the differential image without performing the inverse quantizing process and the orthogonal transformation process, and
- wherein a syntax of the current coding unit includes flag information indicating whether the first mode or the second mode is applied for the current coding unit and the syntax is included in a syntax of the coding unit separate from a syntax of the prediction unit included in the syntax of the coding unit, and
- wherein whether it is in the first mode or the second mode is based on a flag.
3 more elements
Dependencies are inferred from the claim text.