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1. 发明申请

WO2021001644A1 IMAGE DATA ENCODING AND DECODING 审中-公开
公开(公告)号：WO2021001644A1
公开(公告)日：2021-01-07
申请号：PCT/GB2020/051527
申请日：2020-06-24
申请人： SONY CORPORATION , SONY EUROPE B.V.
发明人： KEATING, Stephen Mark , SHARMAN, Karl James , BROWNE, Adrian Richard
IPC分类号： H04N19/10 , H04N19/103 , H04N19/117 , H04N19/159 , H04N19/593
摘要： An image encoding apparatus comprises a selector configured to select, from a set of candidate prediction operations each defining at least a prediction direction, a prediction operation for prediction of samples of a current region of a current image, the current region comprising an array of two or more rows and two or more columns of samples; and an intra- image predictor configured to interpolate predicted samples of the current region with respect to one or more of a group of reference samples being samples decoded from previously encoded samples of the current image, the group of reference samples being selected in dependence upon a prediction direction, defined by the selected prediction operation, between a current sample to be predicted and a reference position amongst the reference samples, in which the intra-image predictor is configured to apply an interpolation process to the group of reference samples in order to generate each predicted sample; in which the intra-image predictor is configured to apply a different respective interpolation process for a plurality of subsets of the predicted samples, according to a relationship between a plurality of interpolation processes and a corresponding plurality of subsets of sample positions in the array of samples.

2. 发明申请

WO2020260874A1 IMAGE DATA ENCODING AND DECODING 审中-公开
公开(公告)号：WO2020260874A1
公开(公告)日：2020-12-30
申请号：PCT/GB2020/051531
申请日：2020-06-24
申请人： SONY CORPORATION , SONY EUROPE B.V.
发明人： KEATING, Stephen Mark , SHARMAN, Karl James , BROWNE, Adrian Richard
IPC分类号： H04N19/13 , H04N19/184 , H04N19/593
摘要： Image data encoding apparatus comprises an entropy encoder configured to selectively encode data items representing image data by an encoding system selected from a context adaptive binary arithmetic coding (CABAC), encoding system and a bypass encoding system; in which the data items include (i) a first data item indicating whether a multi-direction linear model (MDLM) chroma mode applies to a current image region; and (ii) a second data item indicating a processing direction for operation of the MDLM chroma mode; in which the entropy encoder is configured to encode instances of the first data item and to encode instances of the second data item independently of the encoding of instances of the first data item.

3. 发明申请

WO2020260880A1 IMAGE DATA ENCODING AND DECODING 审中-公开
公开(公告)号：WO2020260880A1
公开(公告)日：2020-12-30
申请号：PCT/GB2020/051538
申请日：2020-06-24
申请人： SONY CORPORATION , SONY EUROPE B.V.
发明人： KEATING, Stephen Mark , SHARMAN, Karl James , BROWNE, Adrian Richard
IPC分类号： H04N19/13
摘要： Image data encoding apparatus comprises an entropy encoder for selectively encoding data items representing image data to be encoded by a first, context adaptive binary arithmetic coding (CABAC), encoding system or by a second, bypass, encoding system, so as to generate encoded binarized symbols; the image data representing one or more pictures of a picture sequence, each picture comprising two or more output data units representing respective sub-sections of the picture, each sub-section being decodable and reconstructable independently of other sub-sections in that picture and picture sequence; in which each sub-section is subject to a respective minimum compression ratio.

4. 发明申请

WO2020065293A1 IMAGE DATA ENCODING AND DECODING 审中-公开
公开(公告)号：WO2020065293A1
公开(公告)日：2020-04-02
申请号：PCT/GB2019/052683
申请日：2019-09-24
申请人： SONY CORPORATION , SONY EUROPE B.V.
发明人： SHARMAN, Karl James , KEATING, Stephen Mark , BROWNE, Adrian Richard
IPC分类号： H04N19/117 , H04N19/136 , H04N19/523 , H04N19/70 , H04N19/82
摘要： Image data encoding and/or decoding apparatus comprises an inter-image predictor configured to predict samples of a current image region, of a plurality of regions of an image in a sequence of images, with respect to a reference image region of another, reference, image of the sequence of images, according to a direction vector indicating a spatial displacement of the reference image region from the current image region;an interpolation filter configured to generate the predicted samples of the current image region by spatial interpolation of samples of the reference image region, at least in instances where the direction vector indicates a spatial displacement of a non-integer number of samples, in which the interpolation filter is configured to operate according to a set of filter parameters each defining the spatial frequency response of a set of filters providing interpolation at a spatial displacement resolution of 1/m sample, where m is an integer greater than one; and a filter response selector configured to select a set of the filter parameters from two or more candidate sets of filter parameters for use in respect of at least the current image region.

5. 发明申请

WO2020260879A1 INDEPENDENT CABAC FOR SUB-SECTIONS OF A PICTURE 审中-公开
公开(公告)号：WO2020260879A1
公开(公告)日：2020-12-30
申请号：PCT/GB2020/051537
申请日：2020-06-24
申请人： SONY CORPORATION , SONY EUROPE B.V.
发明人： KEATING, Stephen Mark , SHARMAN, Karl James , BROWNE, Adrian Richard
IPC分类号： H04N19/13
摘要： Image data encoding apparatus comprises an entropy encoder for selectively encoding data items representing image data to be encoded by a first, context adaptive binary arithmetic coding (CABAC), encoding system or by a second, bypass, encoding system, so as to generate encoded binarized symbols; the image data representing one or more pictures of a picture sequence, each picture comprising two or more output data units representing respective sub- sections of the picture, each sub-section being decodable and reconstructable independently of other sub-sections in that picture and picture sequence; the entropy encoder being configured to generate an output data stream subject to a constraint defining an upper limit to the number of binarized symbols that may be expressed by any individual output data unit relative to the size in bytes of that output data unit, in which the entropy encoder is configured to apply the constraint to each output data unit, and to provide padding data, for each output data unit which does not meet the constraint, so as to increase the size in bytes of that output data unit in order to meet the constraint.

6. 发明申请

WO2020260878A1 HIGH THROUGHPUT CABAC 审中-公开
公开(公告)号：WO2020260878A1
公开(公告)日：2020-12-30
申请号：PCT/GB2020/051536
申请日：2020-06-24
申请人： SONY CORPORATION , SONY EUROPE B.V.
发明人： KEATING, Stephen Mark , SHARMAN, Karl James , BROWNE, Adrian Richard
IPC分类号： H04N19/13
摘要： Image data encoding apparatus comprises a first data encoder and a second data encoder, each configured to generate output data bits representing binarized symbols from successive symbols representing image data; the first data encoder being configured to generate output data bits representing encoded symbols at a variable ratio of a number of data bits to a number of encoded symbols; the second data encoder being configured to generate a fixed number of output data bits to represent each encoded symbol; the apparatus comprising a controller configured to control the first data encoder and the second data encoder to generate an output data unit representing a set of symbols of an image portion, subject to a constraint defining an upper limit to the number of symbols that may be expressed by any individual output data unit relative to the size of that output data unit; the controller comprising: a predictor configured to generate a prediction, during generation of the output data unit, of whether the constraint will be met by that output data unit; and a data router configured to route each symbol to either the first data encoder or the second data encoder in dependence upon a current state of the prediction generated by the predictor.

7. 发明申请

WO2020260876A1 IMAGE DATA ENCODING AND DECODING 审中-公开
公开(公告)号：WO2020260876A1
公开(公告)日：2020-12-30
申请号：PCT/GB2020/051534
申请日：2020-06-24
申请人： SONY CORPORATION , SONY EUROPE B.V.
发明人： KEATING, Stephen Mark , SHARMAN, Karl James , BROWNE, Adrian Richard
IPC分类号： H04N19/50 , H04N19/61 , H04N19/645 , H04N19/18
摘要： Apparatus comprises a data encoder configured to derive, from an array of sample values, sample range flags each indicative of whether one or more sample values of the array of sample values lie in a predetermined range of sample values, the data encoder being configured in a first encoding mode to encode the array of sample values, at least in part, by encoding the sample range flags to an output data stream; a predictor configured to predict the state of a group of the sample range flags for a given array of sample values, the group being at least a subset of the sample range flags; and a comparator configured to compare the predicted state of the group of sample range flags with the actual state of the respective sample range flags for the given array of sample values; the data encoder being configured, in response to the comparator, to encode the given array of samples values in a second encoding mode in which the encoder is configured to encode to the output data stream a predetermined number of indicator flags, fewer than the group of sample range flags, to indicate whether the predicted state of the group of sample range flags is the same as the actual state of the group of sample range flags for the given array of sample values.

8. 发明申请

WO2022073789A1 DATA ENCODING AND DECODING 审中-公开
公开(公告)号：WO2022073789A1
公开(公告)日：2022-04-14
申请号：PCT/EP2021/076533
申请日：2021-09-27
申请人： SONY GROUP CORPORATION , SONY EUROPE B.V.
发明人： SHARMAN, Karl James , BROWNE, Adrian Richard , KEATING, Stephen Mark
IPC分类号： H04N19/13 , H04N19/18
摘要： A method of encoding successive data items comprises encoding a given data item using a series of one or more data sets, each data set representing a respective range of values of the data items; the series of one or more data sets comprising at least a significance indicator to indicate whether or not the given data item has a value of at least a first threshold value; and for at least some of the data items, selecting the first threshold value to be greater than 1.

9. 发明申请

WO2021198639A1 VIDEO DATA ENCODING AND DECODING USING A CODED PICTURE BUFFER 审中-公开
公开(公告)号：WO2021198639A1
公开(公告)日：2021-10-07
申请号：PCT/GB2021/050573
申请日：2021-03-08
申请人： SONY GROUP CORPORATION , SONY EUROPE B.V.
发明人： KEATING, Stephen Mark , SHARMAN, Karl James , BROWNE, Adrian Richard
IPC分类号： H04N19/115 , H04N19/70 , H04N19/423 , H04N21/44 , H04N21/44004
摘要： Apparatus comprises a video data decoder; and a coded picture buffer to buffer successive portions of an input video data stream and to provide a portion to the video data decoder for decoding, the coded picture buffer having a coded picture buffer size; the video data decoder being responsive to parameter data associated with the input video data stream, the parameter data indicating, for a given input video data stream, an encoding level selected from a plurality of encoding levels, each level defining at least a maximum luminance picture size, a minimum compression ratio and a maximum value of the coded picture buffer size; in which for each encoding level of the plurality of encoding levels, the maximum value of the coded picture buffer size is greater than or equal to the number of bits required to represent a picture at the maximum luminance picture size when encoded according to the minimum compression ratio.

10. 发明申请

WO2021255443A1 DATA ENCODING AND DECODING 审中-公开
公开(公告)号：WO2021255443A1
公开(公告)日：2021-12-23
申请号：PCT/GB2021/051507
申请日：2021-06-16
申请人： SONY GROUP CORPORATION , SONY EUROPE B.V.
发明人： SHARMAN, Karl James , KEATING, Stephen Mark , BROWNE, Adrian Richard
IPC分类号： H04N19/13 , H04N19/12 , H04N19/14 , H04N19/176 , H04N19/18 , H04N19/196
摘要： A method of encoding successive data items comprises storing history data for encoded data items, the history data indicating one or more aspects of encoding the encoded data items; encoding a given data item by a first encoding technique, the first encoding technique comprising encoding a series of zero or more data sets, each data set representing a respective range of values of the data items and selecting the series of data sets from a plurality of candidate data sets in dependence upon (i) a number of previously encoded data sets; and (ii) the history data applicable to a given property of the given data item; and encoding any remaining value of the given data item, the remaining value being an amount by which the given data item exceeds a maximum value which can be encoded by the first encoding technique, by a second encoding technique different to the first encoding technique.

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