FRAME FILTER

• US 20080094500A1
• Filed: 10/20/2006
• Published: 04/24/2008
• Est. Priority Date: 10/20/2006
• Status: Abandoned Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Everest, Paul S., Apostolopoulos, John G., West, Matthew J.
• Application Number:
  US11/551,697
• Publication Number:
  US 20080094500A1
• Time in Patent Office: Days
• US Class Current: 348/390.1
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/146 Data rate or code amount at the encoder output
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/587 involving temporal sub-sampling or interpolation, e.g. decimation or subsequent interpolation of pictures in a video sequence
• CPC Class Codes: H04N 19/85 using pre-processing or post-processing specially adapted for video compression
• CPC Class Codes: H04N 21/234381 by altering the temporal resolution, e.g. decreasing the frame rate by frame skipping
• CPC Class Codes: H04N 21/2389 Multiplex stream processing, e.g. multiplex stream encrypting
• CPC Class Codes: H04N 21/2662 Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
• CPC Class Codes: H04N 21/4385 Multiplex stream processing, e.g. multiplex stream decrypting

Abstract

One or more streams of image frames are filtered and restored using filtering and restoration patterns, respectively.

Claims

1. A method comprising:

filtering one or more streams of image frames according to a filtering pattern; and

receiving the one or more filtered stream of image frames and replacing filtered out frames with copies of received frames.

2. The method of claim 1 further comprising storing a copy of one of the received frames in a memory, wherein a filtered out frame is replaced with the copy.

3. The method of claim 1 further comprising transmitting the received frames and the copies of the received frames to a decompressor.

4. The method of claim 1, wherein the one or more streams of image frames has a first image frame rate prior to filtering and wherein the one or more streams of image frames has the first image frame rate after the filtered out frames are replaced with copies of the received frames.

5. The method of claim 1, wherein the one or more streams of images has a first image frame rate prior to filtering and wherein the method further comprises transmitting the one or more filtered streams of images via a transport mechanism having a maximum image frame rate less than the first frame rate.

6. The method of claim 5, wherein the first image frame rate is at about 60 frames per second.

7. The method of claim 1, wherein the image frames are computer graphics.

8. The method of claim 1, wherein the one or more streams of image frames prior to filtering correspond to image content that changes at a frequency of less than once every 0.25 seconds.

9. The method of claim 1, wherein at least two consecutive frames are filtered out according to the filtering system.

10. The method of claim 1, wherein a ratio of transmitted frames to filtered out frames is one according to the filtering pattern.

11. The method of claim 1, wherein a ratio of transmitted frames to filtered out frames is greater than one according to the filtering pattern.

12. The method of claim 1 further comprising storing a copy of one of the received frames immediately preceding one of the filtered frames.

13. The method of claim 1 further comprising adjusting the filtering pattern.

14. An apparatus comprising:

a packetizer configured to filter one or more streams of image frames according to a filtering patterns; and

a depacketizer configured to receive the one or more filtered streams of image frames and to replace filtered out frames with copies of received frames.

15. The apparatus of claim 14, wherein the one or more streams has a first frame rate and wherein the apparatus further comprises a transmitter having a maximum second frame rate less than the first frame rate.

16. The apparatus of claim 14 further comprising an ultra wide band radio transmitter configured to transmit filtered image frames from the packetizer to the depacketizer.

17. The apparatus of claim 14, wherein at least two consecutive frames are filtered out according to the pattern.

18. The apparatus of claim 14, wherein the packetizer is configured such that a ratio of transmitted frames to filtered out frames is greater than one according to the pattern.

19. The apparatus of claim 14, wherein the packetizer is configured to selectively adjust the filtering pattern.

20. A computer readable medium including instruction configured to:

filter one or more first streams of received image frames according to a first predefined filtering pattern; and

adjust the filtering pattern so as to filter one or more second streams of received image frames according to a second predefined filtering pattern.