Latency reduction in providing interactive program guide
Techniques presented reduce latencies or delays in the delivery of an interactive program guide. In accordance with a first technique, a method for providing an interactive program guide comprises: providing a plurality of transport streams; providing a group of interactive guide pages within each said transport stream, where the group of interactive guide pages comprise related pages. In accordance with a second technique, a method for providing an interactive program guide comprises: forming a first transport stream including video packets with a first set of packet identifiers; and forming a second transport stream including video packets with a second set of packet identifiers, where the first set of packet identifiers and the second set of packet identifiers include a common packet identifier. In accordance with a third technique, a method for providing an interactive program guide comprises: providing an interactive guide page which may be navigated by a viewer; providing a threshold within the interactive guide page; and if the threshold is crossed during navigation of the page by the viewer, then requesting a next interactive guide page.
1. A method for providing an interactive program guide, comprising:
providing a plurality of transport streams, wherein each transport stream includes at least one elementary stream representing a respective interactive program guide (IPG) page, wherein each IPG page has associated with it a respective guide portion and a common video portion, and wherein each of said IPG pages has associated with it a first plurality of slices representing said common video portion and a second plurality of slices representing said respective guide portion; and
grouping elementary streams associated with related IPG pages within a common transport stream;
encoding said slices associated with said common video portion of said IPG pages only once;
encoding each respective plurality of slices associated with said respective guide portions of said IPG pages; and
associating, for each IPG page, said encoded common video portion slices and respective encoded guide portion slices.
2. A method for providing an interactive program guide, comprising:
providing a plurality of transport streams, wherein each transport stream includes at least one elementary stream representing a respective interactive program guide (IPG) page, wherein each IPG page has associated with it a respective guide portion and a common video portion;
grouping elementary streams associated with related IPG pages within a common transport stream; and
providing for each of a predetermined number of IPG pages in a sequence of IPG pages one video frame for time incremented intra-coding and remaining video frames for time-incremented predictive coding.
3. The method of claim 2 , further including dividing each IPG page representative video frame into slices.
4. The method of claim 3 , further comprising separately encoding slices associated with said common video portion of said IPG page and slices associated with said respective guide portions of said IPG pages.
5. The method of claim 4 , wherein each of said encoded guide portions of said IPG pages is adapted to be combined with said encoded common video portion of said IPG pages to form thereby a respective sequence of image frames.