System and method for managing adjacent channels in an adaptive streaming environment
A system and method for managing adjacent channels in an adaptive streaming environment. One or more adjacent channels may be defined for a client device relative to a current streaming channel, wherein the client device is configured to pre-fetch metadata and initialization information for the defined adjacent channels based on bandwidth conditions, buffer conditions, etc. When a channel is changed, the client device is operative to use the pre-fetched data to quickly obtain encoded media content for rendering.
1. A method operative in a streaming client device disposed in an adaptive streaming environment, the method comprising:
monitoring at least a bandwidth condition relative to a network connection between the streaming client device and a content delivery network;
determining one or more adjacent channels relative to a current streaming channel of the streaming client device;
pre-fetching metadata information associated with the one or more adjacent channels;
responsive to the pre-fetched metadata information, pre-fetching and storing initialization information for the one or more adjacent channels;
if the current streaming channel is changed to a new streaming channel belonging to the one or more adjacent channels, using the pre-fetched initialization information to fetch encoded media content pertaining to the new streaming channel, the encoded media content comprising shortest segments into which the encoded media content has been segmented by a segmentation server system associated with the content delivery network; and
after determining that the new streaming channel has settled for a select time period, sending a request for streaming media content for the new streaming channel in segments larger than the shortest segments.
2. The method as recited in claim 1 , wherein the monitoring further comprises monitoring at least one of video buffer conditions and decoder processing conditions of the streaming client device.
3. The method as recited in claim 1 , wherein the metadata information comprises manifest information associated with the respective one or more adjacent channels.
4. The method as recited in claim 1 , wherein the initialization information corresponding to the one or more adjacent channels comprises at least one of a Sequence Parameters Set (SPS), a Picture Parameters Set (PPS), one or more codec headers, and data necessary to decode slices of frames.
5. The method as recited in claim 4 , wherein the one or more codec headers comprise at least one of MPEG-2 sequence headers, High Efficiency Video Coding (HEVC) headers, and AC3 (audio) headers.
6. The method as recited in claim 1 , wherein the one or more adjacent channels are determined as at least one of a first number of consecutive channels above the current streaming channel and a second number of consecutive channels below the current streaming channel, and further wherein the first number and the second number respectively range from 0 to a quantity based on the network bandwidth condition.
7. The method as recited in claim 1 , wherein the one or more adjacent channels are determined as a group of streaming channels that belong to a content category to which the current streaming channel also belongs.
8. The method as recited in claim 1 , wherein the one or more adjacent channels are determined based on predicting a user's behavioral patterns in a “channel surfing” mode when using the streaming client device.
9. The method as recited in claim 8 , wherein the “channel surfing” mode is ascertained responsive to detecting that the user has changed a plurality of channels within a select time period.
10. The method as recited in claim 1 , further comprising:
using the pre-fetched initialization information, pre-fetching encoded media content of the respective one or more adjacent channels;
pre-decoding the encoded media content; and
if the current streaming channel is changed to a new streaming channel belonging to the one or more adjacent channels, rendering the pre-decoded media content to be displayed immediately.
11. The method as recited in claim 10 , wherein the pre-fetched media content of the respective one or more adjacent channels comprises media content segments encoded at a low bit rate.
12. The method as recited in claim 11 , further comprising:
sending a request for streaming media content encoded at higher bit rates; and
continuing to monitor at least one of the bandwidth conditions of the network connection, video buffer conditions and decoder processing conditions, to determine one or more additional adjacent channels relative to the new streaming channel.
13. A client device, comprising:
one or more processors;
a bandwidth condition monitor; and
a streaming client module coupled to the one or more processors, wherein the streaming client module includes instructions executable by one or more processors and configured to:
determine one or more adjacent channels relative to a current streaming channel of the client device, the one or more adjacent channels being determined responsive to monitoring by the bandwidth condition monitor relative to a network connection between the client device and a content delivery network;
pre-fetch metadata information associated with the one or more adjacent channels;
responsive to the pre-fetched metadata information, pre-fetch and store initialization information for the one or more adjacent channels;
if the current streaming channel is changed to a new streaming channel,
use the pre-fetched initialization information to fetch encoded media content pertaining to the new streaming channel, the encoded media content comprising shortest segments into which the encoded media content has been segmented by a segmentation server system associated with the content delivery network; and
after determining that the new streaming channel has settled for a select time period, sending a request for streaming media content for the new streaming channel in segments larger than the shortest segments.
14. The client device as recited in claim 13 , further comprising a video buffer monitor for monitoring buffer conditions and wherein the one or more adjacent channels are determined further responsive to at least one of the buffer conditions and decoder processing conditions of the client device.
15. The client device as recited in claim 13 , wherein the metadata information comprises manifest information associated with the respective one or more adjacent channels.
16. The client device as recited in claim 13 , wherein the initialization information corresponding to the one or more adjacent channels comprises at least one of a Sequence Parameters Set (SPS), a Picture Parameters Set (PPS), one or more codec headers, and data necessary to decode slices of frames.
17. The client device as recited in claim 16 , wherein the one or more codec headers comprise at least one of MPEG-2 sequence headers, High Efficiency Video Coding (HEVC) headers, and AC3 (audio) headers.
18. The client device as recited in claim 13 , wherein the one or more adjacent channels are determined as at least one of a first number of consecutive channels above the current streaming channel and a second number of consecutive channels below the current streaming channel, and further wherein the first number and the second number respectively range from 0 to a quantity based on the network connection's bandwidth condition.
19. The client device as recited in claim 13 , wherein the one or more adjacent channels are determined as a group of streaming channels that belong to a content category to which the current streaming channel also belongs.
20. The client device as recited in claim 13 , wherein the one or more adjacent channels are determined based on predicting a user's behavioral patterns in a “channel surfing” mode when using the client device.
21. The client device as recited in claim 20 , wherein the “channel surfing” mode is ascertained responsive to detecting that the user has changed a plurality of channels within a select time period.
22. The client device as recited in claim 13 , wherein the streaming client module further comprises instructions configured to:
pre-fetch encoded media content of the respective one or more adjacent channels using the pre-fetched initialization information;
pre-decode the encoded media content; and
render the pre-decoded media content to be displayed immediately if the current streaming channel is changed to a new streaming channel belonging to the one or more adjacent channels.
23. The client device as recited in claim 22 , wherein the pre-fetched media content of the respective one or more adjacent channels comprises media content segments encoded at a low bit rate.
24. The client device as recited in claim 23 , wherein the streaming client module further comprises instructions configured to:
send a request for streaming media content encoded at higher bit rates; and
continue to monitor at least one of the bandwidth conditions of the network connection, video buffer conditions and decoder processing conditions, to determine one or more additional adjacent channels relative to the new streaming channel.