Compressing Video Frames

Abstract

A method includes generating first difference frames and compressing the first difference frames to form compressed difference frames. The compressed difference frames are decompressed to form decompressed difference frames, and the decompressed difference frames are used in the generation of the first difference frames.

1 . A method comprising
 in a feedback loop, generating difference frames indicative of electrically captured images in response to decompression of the difference frames.   
   
   
       2 . The method of  claim 1 , further comprising:
 filtering the difference frames.   
   
   
       3 . The method of  claim 1 , further comprising:
 quantizing data associated with the difference frames.   
   
   
       4 . The method of  claim 1 , further comprising:
 dequantizing data associated with compressed difference frames.   
   
   
       5 . The method of  claim 4 , wherein the compressed difference frames include data indicative of frequency sub-band images. 
   
   
       6 . The method of  claim 1 , further comprising:
 entropy encoding data associated with the difference frames.   
   
   
       7 . The method of  claim 1 , further comprising:
 serially transmitting data associated with the difference frames to a computer.   
   
   
       8 . The method of  claim 1 , further comprising:
 using a pixel array to capture still frames; and   furnishing the still frames to the feedback loop.   
   
   
       9 . A system comprising:
 a first circuit to electrically capture images to produce data; and   a second circuit to receive the data and in a feedback loop, generate difference frames indicative of the images in response to decompression of the difference frames.   
   
   
       10 . The system of  claim 9 , wherein the circuit comprises:
 a transformation circuit to spatially filter the difference frames to generate data indicative of frequency sub-band images.   
   
   
       11 . The system of  claim 9 , wherein the circuit comprises:
 a quantization circuit to quantize data associated with the difference frames.   
   
   
       12 . The system of  claim 9 , wherein the circuit comprises:
 a compression circuit to compress the difference frames to form compressed difference frames; and   a dequantization circuit to dequantize data associated with the compressed difference frames.   
   
   
       13 . The system of  claim 12 , wherein the compressed frames include data indicative of frequency sub-band images, the circuit further comprising:
 an inverse transformation circuit to use the data to generate the decompressed frames.   
   
   
       14 . The system of  claim 9 , wherein the circuit comprises:
 an entropy encoder circuit to encode data associated with the difference frames.   
   
   
       15 . The system of  claim 9 , wherein the circuit comprises an array of pixel sensors. 
   
   
       16 . The system of  claim 9 , wherein the system comprises a camera comprising the first and second circuits. 
   
   
       17 . A method comprising
 in a feedback loop, generating difference frames indicative of images in response to decompression of the difference frames; and   communicating the difference frames from an image capture device.   
   
   
       18 . The method of  claim 17 , wherein the act of communicating the difference frames from the image capturing device comprises communicating data indicative of the difference frames to a serial bus. 
   
   
       19 . The method of  claim 17 , further comprising:
 dequantizing data associated with compressed difference frames.   
   
   
       20 . The method of  claim 17 , further comprising:
 entropy encoding data associated with the difference frames.