Systems and methods for delivering picture-in-picture signals at diverse compressions and bandwidths
View Patent ↗T Systems and methods for providing picture-in-picture, or other multi-picture displays. Some of the systems include two or more video and/or data signals that are coupled to a transmission device. In addition, a selector signal is coupled to the transmission device. The transmission device also includes a video output that, based at least in part on the selector signal, provides a derivative of one of the video and/or data signals at a first compression and bandwidth, and the other video and/or data signal at a second compression and bandwidth. Various of the methods include utilize the systems to transmit two or more video outputs based at least in part on a selector signal.
1. A system for providing picture-in-picture, at a user display device, the system comprising:
a first video signal and a second video signal;
a transmission device, wherein the transmission device includes a selector interface for receiving a selector signal, and a video interface for receiving the first video signal and the second video signal;
wherein the transmission device includes a video output, wherein the video output includes a first video output signal at a first compression and a first bandwidth, and a second video output signal at a second compression and a second bandwidth, and wherein the transmission device further includes a compositing device for combining the first and second video output signals into a composite signal for display at the user display device;
wherein the first video output signal is derived from the first video signal, and the first compression and the first bandwidth is based at least in part on the selector signal;
wherein the second video output signal is derived from the second video signal, and the second compression and the second bandwidth is based at least in part on the selector signal; and
wherein the combined first and second video output signals are displayed at the user display device as the composite signal without the use of multiple tuners at the user display device.
2. The system of claim 1 , wherein the selector signal indicates that the first video signal is a full screen signal, and wherein the selector signal indicates that the second video signal is a partial screen signal.
3. The system of claim 2 , wherein the first transmission bandwidth is greater than the second transmission bandwidth.
4. The system of claim 2 , wherein the selector signal indicates a size of the partial screen signal.
5. The system of claim 4 , wherein the second compression is determined at least in part on the size of the partial screen signal.
6. The system of claim 1 , wherein the transmission device further includes an encoder engine.
7. The system of claim 1 , wherein the first compression is MPEG-2.
8. The system of claim 7 , wherein the second compression is MPEG-2.
9. The system of claim 8 , wherein the first bandwidth is a high bit rate MPEG-2.
10. The system of claim 9 , wherein the second bandwidth is a low bit rate MPEG-2.
11. The system of claim 1 , wherein the transmission device further includes a resolution converter.
12. The system of claim 11 , wherein the resolution converter reduces the resolution of the second video signal relative to the resolution of the first video signal.
13. A method for supporting picture-in-picture, the method comprising:
receiving a first video signal, a second video signal, and a selector signal;
decoding the selector signal, wherein the selector signal indicates that the first video signal is a main-screen video signal, and the second video signal is a sub-screen video signal; and
based at least in part on the decoded selector signal, formatting the first video signal as a high bit rate video signal, and the second video signal as a low bit rate video signal; and
transmitting the high bit rate video signal and the low bit rate video signal over as a composite signal over a transmission medium coupled to a NID; and
displaying the composite signal at a user display device coupled to the NID.
14. The method of claim 13 , wherein the selector signal indicates a display size of the low bit rate video signal.
15. The method of claim 13 , wherein formatting the second video signal as a bit rate video signal comprises reducing the resolution of the second video signal.
16. The method of claim 15 , wherein reducing the resolution comprises reducing the number of lines of displayed video.
17. The method of claim 13 , wherein formatting the first video signal as a high bit rate video signal comprises formatting to a format selected from a group consisting of: a low bit rate MPEG-1 signal, a high bit rate MPEG-1 signal, a low bit rate MPEG-2 signal, a high bit rate MPEG-2 signal, a low bit rate MPEG-4 signal, and a high bit rate MPEG-4 signal.
18. The method of claim 17 , wherein formatting the second video signal as a low bit rate video signal comprises formatting to a low bit rate MPEG-2 signal.
19. The method of claim 13 , wherein a transmission bandwidth of the low bit rate video signal is less than half the transmission bandwidth of the high bit rate video signal.