Adaptive bitrate streaming techniques

Patent metadata

Field	Value
Publication number	US-2020358839-A1
Application number	US-202016940364-A
Country	US
Kind code	A1
Filing date	Jul 27, 2020
Priority date	Jul 24, 2018
Publication date	Nov 12, 2020
Grant date	—

Abstract

Devices, computer-readable media, and methods for providing a timeout for an adaptive bitrate streaming video chunk download are disclosed. For example, a processing system including at least one processor may determine a first bitrate for a first segment of a video program based upon an occupancy level of a video buffer of a device, request a first video chunk of the first segment encoded at the first bitrate, determine that the first video chunk is not received within a threshold of a duration of time after the requesting of the first video chunk, and request, responsive to the determining that the first video chunk is not received within the threshold of the duration of time, a second video chunk of the first segment encoded at a second bitrate that is lower than the first bitrate.

First claim

What is claimed is:

1 . A device comprising:
a processing system including at least one processor; and a computer-readable medium storing instructions which, when executed by the processing system, cause the processing system to perform operations, the operations comprising:
determining a first bitrate for a first segment of a video program based upon an occupancy level of a video buffer of the device;
requesting a first video chunk of the first segment encoded at the first bitrate;
determining that the first video chunk is not received within a threshold of a duration of time after the requesting of the first video chunk; and
requesting, responsive to the determining that the first video chunk is not received within the threshold of the duration of time, a second video chunk of the first segment encoded at a second bitrate that is lower than the first bitrate.

2 . The device of claim 1 , wherein the first bitrate is determined in accordance with a mapping function of buffer occupancy levels to a plurality of available bitrates.

3 . The device of claim 2 , wherein the second bitrate is at least two available bitrates lower than the first bitrate.

4 . The device of claim 1 , wherein the threshold is based upon a segment duration of the first segment and the occupancy level.

5 . The device of claim 1 , wherein the operations further comprise:
receiving a manifest file for the video program, wherein the manifest file identifies a plurality of video chunks associated with a plurality of segments of the video program in accordance with an adaptive bitrate streaming protocol, the plurality of video chunks including the first video chunk and the second video chunk.

6 . The device of claim 5 , wherein for each of the plurality of segments, the associated plurality of video chunks includes video chunks encoded at a plurality of different available bitrates.

7 . The device of claim 5 , wherein a uniform resource locator for the first video chunk and a uniform resource locator for the second video chunk are identified in the manifest file, wherein the uniform resource locator for the first video chunk and the uniform resource locator for the second video chunk are both associated with an edge server.

8 . The device of claim 7 , wherein the edge server comprises an edge server of a content distribution network.

9 . The device of claim 7 , wherein the first video chunk is requested from the edge server in accordance with the manifest file, and wherein the second video chunk is requested from the edge server in accordance with the manifest file.

10 . The device of claim 1 , wherein the operations further comprise:
receiving the second video chunk; writing the second video chunk to the video buffer; and playing out the second video chunk from the video buffer via the device.

11 . A method comprising:
determining, by a processing system including at least one processor, a first bitrate for a first segment of a video program based upon an occupancy level of a video buffer; requesting, by the processing system, a first video chunk of the first segment encoded at the first bitrate; determining, by the processing system, that the first video chunk is not received within a threshold of a duration of time after the requesting of the first video chunk; and requesting, by the processing system, responsive to the determining that the first video chunk is not received within the threshold of the duration of time, a second video chunk of the first segment encoded at a second bitrate that is lower than the first bitrate.

12 . The method of claim 11 , wherein the first bitrate is determined in accordance with a mapping function of buffer occupancy levels to a plurality of available bitrates.

13 . The method of claim 12 , wherein the second bitrate is at least two available bitrates lower than the first bitrate.

14 . The method of claim 11 , further comprising:
receiving a manifest file for the video program, wherein the manifest file identifies a plurality of video chunks associated with a plurality of segments of the video program in accordance with an adaptive bitrate streaming protocol, the plurality of video chunks including the first video chunk and the second video chunk.

15 . The method of claim 14 , wherein for each of the plurality of segments, the associated plurality of video chunks includes video chunks encoded at a plurality of different available bitrates.

16 . The method of claim 14 , wherein a uniform resource locator for the first video chunk and a uniform resource locator for the second video chunk are identified in the manifest file, wherein the uniform resource locator for the first video chunk and the uniform resource locator for the second video chunk are both associated with an edge server.

17 . The method of claim 16 , wherein the edge server comprises an edge server of a content distribution network.

18 . The method of claim 16 , wherein the first video chunk is requested from the edge server in accordance with the manifest file, and wherein the second video chunk is requested from the edge server in accordance with the manifest file.

19 . The method of claim 11 , further comprising:
receiving the second video chunk; writing the second video chunk to the video buffer; and playing out the second video chunk from the video buffer via a device.

20 . A non-transitory computer-readable medium storing instructions which, when executed by a processing system including at least one processor, cause the processing system to perform operations, the operations comprising:
determining a first bitrate for a first segment of a video program based upon an occupancy level of a video buffer; requesting a first video chunk of the first segment encoded at the first bitrate; determining that the first video chunk is not received within a threshold of a duration of time after the requesting of the first video chunk; and requesting, responsive to the determining that the first video chunk is not received within the threshold of the duration of time, a second video chunk of the first segment encoded at a second bitrate that is lower than the first bitrate.

Assignees

• At & T Ip I Lp

Inventors

• Mahvash Mohammad
• Pejhan Sassan
• Kha Buu
• Newell Garrett

Classifications

• H04L65/752

  adapting media to network capabilities · CPC title

• H04L65/70

  Media network packetisation · CPC title

• H04L65/65 Primary

  Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP] · CPC title

• H04L65/612

  for unicast · CPC title

• H04N21/44004

  involving video buffer management, e.g. video decoder buffer or video display buffer · CPC title