Methods and devices for efficient adaptive bitrate streaming

Patent metadata

Field	Value
Publication number	US-9986008-B2
Application number	US-201615262964-A
Country	US
Kind code	B2
Filing date	Sep 12, 2016
Priority date	Sep 24, 2012
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

Methods and systems for a content server to select sets of video streams having different encoding parameters for transmitting the sets of video streams to a media device are disclosed herein. In some embodiments, a method for transmitting video streams for a media program from a server to a media device includes: selecting, by the server, first encoding parameters including a first bitrate for a first set of video streams for the media program based on a first estimated bandwidth capacity for a network linking the server and the media device, transmitting the first set of video streams from the server to the media device, determining, by the server, second encoding parameters including a second bitrate for a second set of video streams for the media program, and transmitting the second set of video streams from the server to the media device.

First claim

What is claimed is:

1. A method for transmitting video streams for a media program, the method comprising:
calculating, at the server, a first estimated bandwidth capacity for a first network connecting the server and a first media device;
calculating, at the server, a second estimated bandwidth capacity for a second network connecting the server and a second media device;
selecting, by the server, first encoding parameters including a first bitrate and a first temporal length for a first set of video streams for the media program to be presented on the first media device based on the first estimated bandwidth capacity and the second estimated bandwidth capacity; and
transmitting the first set of video streams as a plurality of video streams, each having a duration corresponding to the first temporal length, from the server to the first media device using the first bitrate selected by the server.

2. The method of claim 1 , wherein calculating the first estimated bandwidth capacity comprises determining a duration of time to receive an acknowledgement from the first media device of a transmission from the server, wherein the first estimated bandwidth capacity is calculated based on the duration of time and an amount of data included in the transmission.

3. The method of claim 1 , further comprising:
comparing the first bitrate to the first estimated bandwidth capacity;
in response to determining that the first bitrate is greater than the first estimated bandwidth capacity, selecting a second bitrate that is lower than the first bitrate; and
transmitting a second set of video streams from the server to the first media device using the second bitrate.

4. The method of claim 1 , further comprising:
updating the first estimated bandwidth capacity for the first network connecting the server and the first media device; and
in response to determining that the updated first estimated bandwidth capacity is less than the first estimated bandwidth capacity, transmitting a second set of video streams from the server to the first media device at a resolution that is lower than a resolution of the first set of video streams.

5. The method of claim 1 , wherein the first estimated bandwidth capacity is based on a window size of a receive buffer of the first media device.

6. The method of claim 5 , further comprising transmitting a second set of video streams from the server to the first media device using a second bitrate that is higher than the first bitrate in response to determining that the window size of the receive buffer of the first media device has been increased by the first media device.

7. The method of claim 5 , further comprising determining a resolution of the first set of video streams based on the window size of the receive buffer of the first media device.

8. A system for transmitting video streams for a media program, the system comprising:
a hardware processor that is programmed to:
calculate a first estimated bandwidth capacity for a first network connecting a server and a first media device;
calculate a second estimated bandwidth capacity for a second network connecting the server and a second media device;
select first encoding parameters including a first bitrate and a first temporal length for a first set of video streams for the media program to be presented on the first media device based on the first estimated bandwidth capacity and the second estimated bandwidth capacity; and
transmit the first set of video streams as a plurality of video streams, each having a duration corresponding to the first temporal length, from the server to the first media device using the first bitrate selected by the server.

9. The system of claim 8 , wherein the hardware processor is further programmed to determine a duration of time to receive an acknowledgement from the first media device of a transmission from the server, wherein the first estimated bandwidth capacity is calculated based on the duration of time and an amount of data included in the transmission.

10. The system of claim 8 , wherein the hardware processor is further programmed to:
compare the first bitrate to the first estimated bandwidth capacity;
in response to determining that the first bitrate is greater than the first estimated bandwidth capacity, select a second bitrate that is lower than the first bitrate; and
transmit a second set of video streams from the server to the first media device using the second bitrate.

11. The system of claim 8 , wherein the hardware processor is further programmed to:
update the first estimated bandwidth capacity for the first network connecting the server and the first media device; and
in response to determining that the updated first estimated bandwidth capacity is less than the first estimated bandwidth capacity, transmit a second set of video streams from the server to the first media device at a resolution that is lower than a resolution of the first set of video streams.

12. The system of claim 8 , wherein the first estimated bandwidth capacity is based on a window size of a receive buffer of the first media device.

13. The system of claim 12 , wherein the hardware processor is further programmed to transmit a second set of video streams from the server to the first media device using a second bitrate that is higher than the first bitrate in response to determining that the window size of the receive buffer of the first media device has been increased by the first media device.

14. The system of claim 12 , wherein the hardware processor is further programmed to determine a resolution of the first set of video streams based on the window size of the receive buffer of the first media device.

15. A non-transitory computer-readable medium containing computer executable instructions that, when executed by a processor, cause the processor to perform a method for transmitting video streams for a media program, the method comprising:
calculating a first estimated bandwidth capacity for a first network connecting a server and a first media device;
calculating a second estimated bandwidth capacity for a second network connecting the server and a second media device;
selecting first encoding parameters including a first bitrate and a first temporal length for a first set of video streams for the media program to be presented on the first media device based on the first estimated bandwidth capacity and the second estimated bandwidth capacity; and
transmitting the first set of video streams as a plurality of video streams, each having a duration corresponding to the first temporal length, from the server to the first media device using the first bitrate selected by the server.

16. The non-transitory computer-readable medium of claim 15 , wherein calculating the first estimated bandwidth capacity comprises determining a duration of time to receive an acknowledgement from the first media device of a transmission from the server, wherein the first estimated bandwidth capacity is calculated based on the duration of time and an amount of data included in the transmission.

17. The non-transitory computer-readable medium of claim 15 , wherein the method further comprises:
comparing the first bitrate to the first estimated bandwidth capacity;
in response to determining that the first bitrate is greater than the first estimated bandwidth capacity, selecting a second bitrate that is lower than the first bitrate; and
transmitting a second set of video streams from the server to the first media device using the second bitrate.

18. The non-transitory c

Assignees

• Google Technology Holdings LLC

Inventors

• Ramamurthy Arjun
• Luthra Ajay

Classifications

• H04N21/2402

  Monitoring of the downstream path of the transmission network, e.g. bandwidth available (traffic monitoring in data switching networks H04L43/00; monitoring data switching networks utilization H04L43/0876) · CPC title

• H04N21/6373

  for rate control {, e.g. request to the server to modify its transmission rate (flow control in packet networks H04L47/10)} · CPC title

• H04N21/234363

  by altering the spatial resolution, e.g. for clients with a lower screen resolution · CPC title

• H04N21/6583

  Acknowledgement · CPC title

• H04N21/6379

  directed to encoder {, e.g. for requesting a lower encoding rate} · CPC title