Patent ID: 6185265
Filing Date: 2001-02-06
Classification: H03M,H04B

Abstract:
A method of formatting broadcast channels for transmission via satellite to remote receivers in a satellite direct broadcast system comprising the steps of:framing said broadcast channels into broadcast channel frames, said broadcast channel frames having a selected first period at a broadcast station;coding said broadcast channel frames using Reed-Solomon coding;interleaving said broadcast channel frames; andgenerating time division multiplexed frames having a selected second period of smaller duration than said selected first period using said broadcast channel frames;wherein said broadcast channel frames correspond to prime rate channels of duration corresponding to said selected first period and comprising two-bit symbols and said generating step for generating time division multiplexed frames further comprises the steps of:aligning said two-bit symbols in a plurality of said prime rate channels to a time division multiplexed frame symbol clock;arranging said plurality of said prime rate channels in parallel; andwriting said two-bit symbols to at least one of said time division multiplexed frames in groups, corresponding ones of said two-bit symbols in said parallel prime rate channels being arranged serially in said groups, each of said groups comprising a number of said symbols corresponding in number to said parallel prime rate channels.