Mobile imaging application, device architecture, and service platform architecture
Systems and methods are provided for compressing and decompressing still image and video image data in mobile devices. Corresponding mobile device architectures, and service platform architectures for transmitting, storing, editing and transcoding still images and video images over wireless and wired networks and viewing them on display-enabled devices are also provided.
1 . An improved method of joint source-channel coding, wherein the joint source-channel coding sequentially processes source video to be compressed in a source encoder stage, a channel encoder stage and a rate controller stage to produce a joint source-channel coded bitstream, the improvement comprising:
determining a change in at least one of a transmission bandwidth parameter and a transmission error rate parameter;
changing the process of at least one of the source encoder stage, the channel encoder stage and the rate control stage in response to the at least one determined change.
2 . The method of claim 1 , wherein at least one of the parameters is an instantaneous parameter.
3 . The method of claim 1 , wherein at least one of the parameters is a predicted parameter.
4 . The method of claim 1 , wherein at least one of the parameters is an average parameter.
5 . The method of claim 1 , wherein the improvement further comprises providing a source encoder stage that is scalable and utilizes wavelets.
6 . The method of claim 1 , wherein at least one of the parameters is received from a cellular telephone signal tower.
7 . The method of claim 1 , wherein changing the process of at least one of the stages results in a rate change increment in a range of about 1 to 40 percent.
8 . The method of claim 1 , wherein changing the process of at least one of the stages results in a rate change increment in a range of about 1 to 5 percent.