Patent ID: 7593620

Claim:
A table comprising: at least one record mapping a respective data offset in a file containing a representation of a bitstream to a corresponding time offset in the bitstream, wherein the at least one record stored on a storage medium in the table is used to search and retrieve data from the bitstream, wherein at least one record in the table is mapped to at least one further record, wherein the at least one further record comprises conditional access information used to decode a desired portion of data in the bitstream upon location of the desired portion of data using the table and at least one television control command used to control access to at least one audio visual program included in the bitstream, and wherein the bitstream and the conditional access information are synchronized at the time of storing the conditional access information and the bitstream, and wherein the bitstream comprises: at least one key frame used to regenerate a portion of audiovisual data independently of other portions of bitstream data, and at least one delta frame configured to map changes from the portion of audiovisual data represented by the key frame to the bitstream data.