Systems, methods and computer readable media for instant multi-channel video content browsing in digital video distribution systems
Techniques for delivery and presentation/display of audio-visual signals over electronic communications network channels are disclosed herein. In an exemplary embodiment, a video server for an IPTV system is disclosed. The system includes a video extractor/transporter (shortly referred to as video extractor) for extracting encoded audio-visual signals from at least one video source, and distributing the signals over the electronic communications network channels. The system also includes control logic which can receive control messages from receivers and invoke the video extractor to extract audio-visual signals therefrom.
1. A method for preparing a plurality of audio-visual signals for distribution in an IPTV system to at least one receiver and distributing said audio-visual signals over two or more electronic communications network channels, comprising:
(a) processing one or more control messages from one or more receivers, wherein said control message comprises:
a request to avoid propagation delay at a receiver;
a request to change from displaying a first audio-visual signal to displaying a second audio-visual signal at said receiver;
duration of time data to display said second audio-visual signal; and
bandwidth data for said receiver;
(b) receiving one or more encoded format audio-visual signals from at least one video source, said encoded format comprising a base layer and enhancement layer format, wherein said video source comprises a video database that stores a plurality of audio-visual signals encoded in base layer and enhancement layer format;
(c) extracting, in an extractor, for distribution to the one or more receivers, in response to said one or more control messages, a first audio-visual signal from said received encoded format audio-visual signals, and at least a base layer of a second audio-visual signal that said receiver is anticipated to display in subsequent display changes; and
(d) distributing said extracted audio-visual signals to said one or more receivers, wherein the video source and the extractor are not co-located.
2. The method of claim 1 , wherein said video source comprises a video encoder that receives a plurality of audio-visual signals from a live recording device and encodes said audio-visual signals in base layer and enhancement layer format.
3. The method of claim 1 , wherein said video source comprises a video transcoder, which encodes a plurality of audio-visual signals stored in a third party video database, wherein said third party video database stores a plurality of audio-visual signals encoded in a format other than base layer and enhancement layer format.
4. The method of claim 1 , wherein said extracting further comprises, in response to a condition wherein said duration of time exceeds a pre-determined threshold:
(a) extracting said base layer and enhancement layers of said second audio-visual signal; and
(b) extracting a plurality of additional base layers of audio-visual signals that said receiver is anticipated to display in subsequent display changes until said maximum bandwidth of said receiver is met.
5. A non-transitory computer-readable medium comprising a set of instructions to direct a processor to perform the methods recited in one of claims 1 - 4 .