Abstract:
A transmitting method according to one general aspect of the present disclosure includes: a packetizing step of packetizing (1) sample data, (2) first meta data and (3) second meta data that configure a file of an MP4 format, while the sample data is data obtained by encoding a video signal or an audio signal, the first meta data is used to decode the sample data, and the second meta data includes data that can be generated only after generation of the sample data and is used to decode the sample data; and a transmitting step of transmitting the packetized first meta data, the packetized sample data and the packetized second meta data in order.
Abstract:
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.
Abstract:
A transmission method for transmitting encoded data obtained by hierarchically encoding a video image includes: generating an encoded stream that includes time information and the encoded data, the time information indicating a time at which decoding or displaying processing of the encoded data is performed, and transmitting the generated encoded stream, wherein the encoded data includes a plurality of sets each including a plurality of access units and the time information includes first time information which indicates a time at which the processing performed on a first access unit of the first set is performed and which is based on a reference clock, and second time information used to specify a time at which the processing performed on a second access unit of the second set is performed and which is based on the reference clock.
Abstract:
A transmitting method according to one aspect of the present disclosure includes transmitting a first stream, the first stream including: timing update identification information id1 indicating whether or not a correspondence relationship between a first reference clock and a second reference clock has been updated, the first reference clock being used to transmit and receive the first stream, and the second reference clock being used to transmit and receive a second stream related to another content to be reproduced in synchronization with the content related to the first stream; a first time according to the first reference clock; and a second time according to the second reference clock, the second time being associated with the first time based on the updated correspondence relationship.
Abstract:
A transmission method includes: dividing a picture into a plurality of regions; generating a plurality of pieces of encoded data that respectively correspond to the plurality of regions by encoding the plurality of regions such that each of the plurality of regions can be decoded independently; packetizing by storing the generated plurality of pieces of encoded data in a plurality of packets; and a transmitting step of transmitting the plurality of packets. In the packetizing step, the plurality of pieces of encoded data are stored in the plurality of packets such that pieces of encoded data for different regions are not stored in a single packet. By this, workload for generation of decoding target data is reduced.
Abstract:
A storage method according to one aspect includes: a reception step of receiving a coded stream including a plurality of files that are of a data unit in a predetermined file format; a storage step of accumulating the received plurality of files of the coded stream in a memory; and a generation step of generating first control information used to play back the stored plurality of files, the first control information correlating the plurality of files. Therefore, the method for accumulating data in which one coded stream is divided into a plurality of files is provided.
Abstract:
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.