Content supply device, content supply method, program, terminal device and content supply system
The present disclosure relates to a content supply device, a content supply method, a program, a terminal device and a content supply system that are configured to be capable of realizing rapid zapping between channels in DASH. The content supply device of the present disclosure supplies a plurality of items of streaming data with differing attributes, which is content with identical detail, to the same channel, and is provided with a supply portion that divides the streaming data into minimum units when the reception of streaming data is switched according to a timing that is made uniform with other channels, and supplies the streaming data to a reception side through a network, and a metafile generation portion that generates metafiles for the reception side to receive the streaming data that is supplied in the minimum units, which show that the streaming data is for zapping. The present disclosure can be applied to a system that performs streaming distribution of content.
1. A content supply device that supplies a plurality of items of streaming data with differing attributes, which is content with identical detail, to a same channel according to an adaptive streaming technique, comprising:
a supply portion that divides the streaming data into minimum units when the reception of streaming data is switched according to a timing that is made uniform with other channels, and supplies the streaming data in the minimum units for reception by a reception side through a network; and
a metafile generation portion that generates metafiles for reception by the reception side to receive the streaming data that is supplied in the minimum units, which show that the streaming data is for zapping.
2. The content supply device according to claim 1 , wherein the supply portion divides the streaming data into the minimum units according to a timing that is made uniform with other channels that belong to the same group.
3. The content supply device according to claim 2 , wherein the supply portion synchronizes with an NTP temporal axis, matches leading ends of the minimum units with other channels that belong to the same group, and divides the streaming data into the minimum units using a length of time that is made uniform with other channels that belong to the same group.
4. The content supply device according to claim 2 , wherein the supply portion divides the streaming data for zapping into the minimum units using a length of time that is shorter than the minimum units of the streaming data for viewing.
5. The content supply device according to claim 2 , wherein the metafile generation portion generates expanded MPDs as the metafiles.
6. The content supply device according to claim 2 , further comprising:
an accumulator portion that accumulates the metadata for zapping, and supplies the metadata for zapping to the reception side.
7. The content supply device according to claim 6 , wherein the metafile generation portion generates the MPDs into which MPD/@NTPSynchronized attributes and MPD/SegmentAlignedGroupID attributes have been introduced as the metafiles, and
the accumulator portion accumulates the metadata for zapping on the basis of the MPD/@NTPSynchronized attributes and the MPD/SegmentAlignedGroupID attributes.
8. The content supply device according to claim 6 , wherein the metafile generation portion generates the MPDs into which MPD/@forZapping attributes have been introduced as the metafiles, and
the accumulator portion accumulates the metadata for zapping on the basis of the MPD/@forZapping attributes.
9. The content supply device according to claim 6 , wherein the metafile generation portion defines at least one of a length of time of the minimum units or a maximum length of time of the streaming data in the metadata as the metafiles, and
the accumulator portion accumulates the metadata for zapping on the basis of at least one of the length of time of the minimum units or the maximum length of time of the streaming data.
10. A content supply method of a content supply device that supplies a plurality of items of streaming data with differing attributes, which is content with identical detail, to a same channel according to an adaptive streaming technique, the method comprising:
a supply step of dividing the streaming data into minimum units when the reception of streaming data is switched according to a timing that is made uniform with other channels, and supplying the streaming data in the minimum units for reception by a reception side through a network; and
a metafile generation step of generating metafiles for reception by the reception side to receive the streaming data that is supplied in the minimum units, which show that the streaming data is for zapping,
the supply step of dividing and the metafile generation step are executed by the content supply device.
11. A non-transitory computer readable memory having stored thereon a program that when executed causes a computer that supplies a plurality of items of streaming data with differing attributes, which is content with identical detail, to a same channel according to an adaptive streaming technique, to function as:
a supply portion that divides the streaming data into minimum units when the reception of streaming data is switched according to a timing that is made uniform with other channels, and supplies the streaming data in the minimum units for reception by a reception side through a network; and
a metafile generation portion that generates metafiles for reception by the reception side to receive the streaming data that is supplied in the minimum units, which show that the streaming data is for zapping.
12. A terminal device that receives streaming data that is supplied from a content supply device that supplies a plurality of items of the streaming data with differing attributes, which is content with identical detail, to a same channel according to an adaptive streaming technique,
wherein the content supply device includes:
a supply portion that divides the streaming data into minimum units when the reception of streaming data is switched according to a timing that is made uniform with other channels, and supplies the streaming data in the minimum units to a reception side through a network; and
a metafile generation portion that generates metafiles for the terminal device to receive the streaming data that is supplied in the minimum units, which show that the streaming data is for zapping, and
acquires the metafiles for zapping, and switches the reception of the streaming data that is respectively supplied from different channels on the basis of the acquired metafiles for zapping.
13. A content supply system that is formed from a content supply device that supplies a plurality of items of the streaming data with differing attributes, which is content with identical detail, to a same channel according to an adaptive streaming technique, and a terminal device that receives the streaming data
wherein the content supply device includes:
a supply portion that divides the streaming data into minimum units when the reception of streaming data is switched according to a timing that is made uniform with other channels, and supplies the streaming data in the minimum units to a reception side through a network; and
a metafile generation portion that generates metafiles for the terminal device to receive the streaming data that is supplied in the minimum units, which show that the streaming data is for zapping, and
wherein the terminal device acquires the metafiles for zapping, and switches the reception of the streaming data that is respectively supplied from different channels on the basis of the acquired metafiles for zapping.