Panasonic Intellectual Property Corporation of America

Sun Patent Trust

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Noritaka Iguchi

Toshiyasu Sugio

Tadamasa Toma

Hisaya Katou

Takahiro Nishi

Pongsak Lasang

Chi Wang

Chung Dean Han

Keng Liang Loi

Tomohiro Kimura

Mikihiro Ouchi

Pradit Mittrapiyanuruk

Daisuke Hayashi

Tetsuya Yagi

Ryosuke Mori

Koji Setoh

Ippei Kanno

Masato Ohkawa

Akira Kisoda

Hisao Sasai

Kengo Terada

Zheng Wu

Taiho Nakazawa

Yui Koashi

Yasuhisa Inada

Yumiko Kato

Sadashi Kageyama

Kouji Setoh

An encoding method for encoding three-dimensional points each having a position represented by a distance and an angle, the encoding method comprising: identifying three-dimensional points that belong to a second processing unit and have been encoded, for inter prediction of a first three-dimensional point belonging to a first processing unit; and selecting a reference three-dimensional point from the three-dimensional points identified to calculate an inter predicted value of the first three-dimensional point. The three-dimensional points identified include a second three-dimensional point and a third three-dimensional point, the second three-dimensional point having a second angle corresponding to a first angle of the first three-dimensional point, the third three-dimensional point having a third angle greater than the second angle.

Encoding method, decoding method, encoding device, and decoding device

A three-dimensional data encoding method includes: obtaining second attribute information obtained by transforming first attribute information of a three-dimensional point in at least one frame among frames, the frames constituting a sequence; and encoding the second attribute information to generate a bitstream. The transforming is different from quantization, and the bitstream further includes: at least one first parameter provided for the sequence for the transforming; and at least one second parameter provided for each of the at least one frame for the transforming.

Three-dimensional data encoding method, three-dimensional data decoding method, three-dimensional data encoding device, and three-dimensional data decoding device

A three-dimensional data encoding method includes: calculating a prediction residual that is a difference between geometry information of a three-dimensional point included in point cloud data and a predicted value; quantizing the prediction residual using a first quantization parameter; and generating a bitstream including (i) first information indicating the prediction residual quantized, (ii) second information indicating a second quantization parameter, (iii) third information indicating a first difference between the second quantization parameter and the first quantization parameter, (iv) fourth information indicating a first bit count of the first information, and (v) fifth information indicating a second bit count of the fourth information. When the first difference is not zero, the bitstream further includes sixth information indicating an amount of change in the fifth information that is in accordance with the first difference, and when the first difference is zero, the bitstream does not include the sixth information.

A three-dimensional data encoding method includes: calculating a predicted value of a position of a three-dimensional point according to one of inter prediction and intra prediction; calculating a residual between the predicted value and the position; arithmetic-encoding the residual using a first context when the predicted value is calculated according to the inter prediction; and arithmetic-encoding the residual using a second context different from the first context when the predicted value is calculated according to the intra prediction. The residual is expressed by third residual information indicating a bit count of the residual.

A three-dimensional data encoding method of encoding three-dimensional points includes: calculating a predicted value of attribute information of a first three-dimensional point in a prediction mode, using one or more items of attribute information of one or more second three-dimensional points in the vicinity of the first three-dimensional point; calculating a prediction residual that is a difference between the attribute information of the first three-dimensional point and the predicted value; and generating a bitstream including the prediction residual and prediction mode information indicating the prediction mode. The prediction mode is: one prediction mode among two or more prediction modes when a type of the attribute information of the first three-dimensional point is first attribute information including elements more than a predetermined threshold value; and one fixed prediction mode when the type is second attribute information including elements equal to or less than the predetermined threshold value.

A three-dimensional data encoding method includes: quantizing geometry information of each of three-dimensional points, using a first quantization parameter; quantizing a first luminance using a second quantization parameter and quantizing a first chrominance using a third quantization parameter, the first luminance and the first chrominance indicating a first color among attribute information of each of the three dimensional points; and generating a bitstream including the geometry information quantized, the first luminance quantized, the first chrominance quantized, the first quantization parameter, the second quantization parameter, and a first difference between the second quantization parameter and the third quantization parameter.

A receiving method of receiving a first data unit in which data making up an encoded stream is stored and the first data unit stores a plurality of second data units. The receiving method includes: receiving the first data unit, first time information indicating a presentation time of the first data unit, second time information indicating, together with the first time information, a presentation time or a decoding time of each of the plurality of second data units, and identification information; calculating the presentation time or the decoding time of each of the plurality of second data units using the first time information and the second time information; and correcting the presentation time or the decoding time of each of the plurality of second data units based on the identification information.

Receiving method, receiving device, and transmission and reception system

A three-dimensional data encoding method includes: determining whether a first valid node count is greater than or equal to a first threshold value predetermined, the first valid node count being a total number of valid nodes that are nodes each including a three-dimensional point, the valid nodes being included in first nodes belonging to a layer higher than a layer of a current node in an N-ary tree structure of three-dimensional points included in point cloud data, N being an integer greater than or equal to 2; and, when the first valid node count is greater than or equal to the first threshold value, performing first encoding on attribute information of the current node, the first encoding including a prediction process in which second nodes are used, the second nodes including a parent node of the current node and belonging to a same layer as the parent node.

A transmission method includes: generating a frame for transfer which stores one or more first internet protocol (IP) packets storing content, and one or more second IP packets each including reference clock information which indicates a time for a playback of the content; and transmitting the generated frame through broadcasting. In the generating, header compression is performed on the one or more first IP packets and the header compression is not performed on the one or more second IP packets.

Transmission method, reception method, transmission apparatus, and reception apparatus

A data transmission method according to one aspect of the present disclosure includes: generating a plurality of MPUs, reference clock time information, and leading clock time information indicating a leading PTS that is a clock time at which a leading access unit in the MPU is presented, transmitting the generated plurality of MPUs, reference clock time information, and leading clock time information, wherein the leading clock time information indicates the leading PTS of the plurality of MPUs of which presentation is started after the leading clock time information is transmitted in the generated plurality of MPUs, and each of the generated plurality of MPUs indicates a time point at which each access unit that does not exist in a head of the MPU is presented as a relative value to a time point of another access unit in the MPU.

Data transmission method, data playback method, data transmission device, and data playback device

A three-dimensional data encoding method includes: encoding attribute information of three-dimensional points, the three-dimensional points being classified into one or more layers, based on geometry information of the three-dimensional points; and generating a bitstream including the attribute information encoded. In encoding of attribute information of a current three-dimensional point included in the three-dimensional points, same layer reference is performed when a total number of the one or more layers is one, the same layer reference including generating a prediction value of the attribute information of the current three-dimensional point by reference to attribute information of an other three-dimensional point included in a same layer as the current three-dimensional point.

A three-dimensional data encoding method of encoding geometry information of a first three-dimensional point cloud located in a first area includes: selecting a moving method from among moving methods; determining a second area based on the moving method selected and the first area; moving a second three-dimensional point cloud located in the second area determined, to the first area, using a method in accordance with the moving method; encoding the geometry information of the first three-dimensional point cloud, based on encoded geometry information of the second three-dimensional point cloud moved to the first area; and generating a bitstream including the geometry information of the first three-dimensional point cloud encoded and moving information indicating the moving method. The moving methods include a method for rotating the second three-dimensional point cloud about a vertical axis of a mobile body that includes a sensor configured to generate the first three-dimensional point cloud.

A three-dimensional data encoding method includes: generating a bitstream by encoding subspaces included in a current space in which three-dimensional points are included. The bitstream includes encoded data respectively corresponding to the subspaces. In the generating of the bitstream, a list of information about the subspaces is stored in first control information included in the bitstream. The subspaces are respectively associated with identifiers assigned to the subspaces, and the first control information is common to the encoded data. Each of the identifiers assigned to the subspaces respectively corresponding to the encoded data is stored in a header of a corresponding one of the encoded data.

A three-dimensional data encoding method includes: assigning three-dimensional points to M layers, where M is an integer greater than 1; generating respective predicted values of attribute information for the three-dimensional points; encoding the attribute information based on the respective predicted values; and generating a bitstream including layer-number information indicating a number N of lower layers including a bottom-most layer among the M layers, where N is an integer between zero and M, inclusive. In the generating of the predicted values: (i) a predicted value for an upper-layer three-dimensional point in upper layers other than the lower layers among the M layers is generated by a same-layer reference in which another three-dimensional point belonging to a same layer as the upper-layer three-dimensional point is referenced; and (ii) a predicted value for a lower-layer three-dimensional point in lower layers is generated in a condition where the same-layer reference is disabled.

A three-dimensional data encoding method includes: encoding items of attribute information corresponding to respective three-dimensional points using a parameter; and generating a bitstream including the items of attribute information encoded and the parameter. Each of the items of attribute information belongs to one of at least one layer. Each of the three-dimensional points belongs to one of at least one region. The parameter is determined based on a layer to which an item of attribute information to be encoded in the encoding belongs, and a region to which a three-dimensional point having the item of attribute information to be encoded in the encoding belongs. The parameter included in the bitstream includes a predetermined reference value, a first difference value determined for each of the at least one layer, and a second difference value determined for each of the at least one region.

Growing community of inventors

Osaka, Japan

Noritaka Iguchi