Method and system for transcoding based robust streaming of compressed video

A computer readable medium including program codes for instructing one or more digital processors for transmitting digital video data having a plurality of data blocks, the program codes including:

• instructions for encoding a video data block to a coded data block;
• instructions for converting the coded data block to a transcoded data block incorporating a prediction block and a residual block associated with the video data block;
• and
• instructions for transmitting the transcoded data block to a decoder for decoding.

A method for providing a video service based on digital video data having a plurality of data blocks, the method including:

• encoding each of the plurality of data blocks to a coded data block;
• converting each of the plurality of coded data blocks to a transcoded data block incorporating a prediction block and a residual block associated with the coded data block;
• transmitting at least one of the plurality of coded data blocks and at least one of the plurality of transcoded data blocks in a bit stream transmitted over a computer network to a decoder;
• and
• adjusting a ratio of the transcoded data blocks and the coded data blocks in the bit stream.

A computer readable medium having program codes stored thereon, the program codes being executable by one of more digital processor for providing a video service based on digital video data having a plurality of data blocks, the computer codes including:

• instructions for encoding each of the plurality of data blocks to a coded data block;
• instructions for converting each of the plurality of coded data blocks to a transcoded data block incorporating a prediction block and a residual block associated with the coded data block;
• instructions for transmitting at least one of the plurality of coded data blocks and at least one of the plurality of transcoded data blocks in a bit stream transmitted over a computer network to a decoder;
• and
• instructions for adjusting a ratio of the transcoded data blocks in the bit stream.

A method for decoding video data including a plurality of blocks, the method including:

• receiving a bit stream carrying a block of encoded data encoded from a block of video data;
• obtaining the block of encoded data by decoding the bit stream;
• determining the block of encoded data to be a transcoded data block incorporating a prediction block and a residual block associated with the block of video data;
• determining an availability of the prediction block associated with the block of video data;
• and
• selecting according to the availability of the prediction data block one of a first and a second decoding schemes for decoding the transcoded data block.

A computer readable medium including program codes stored thereon, wherein the program codes are executable by one or more digital processor for decoding video data including a plurality of blocks, the program codes including:

• instructions for receiving a block of encoded video data;
• instructions for determining the block of encoded video data to be a transcoded data block incorporating a prediction block and a residual block associated with a block of the video data from which the block of the encoded video data is formed;
• instructions for determining an availability of the prediction block associated with the block of the video data;
• and
• instructions for selecting according to the availability of the prediction data block one of a first and a second decoding schemes for decoding the transcoded data block.