METHOD AND APPARATUS FOR QAM MODULATOR CHANNEL DUPLICATION

摘要

A content distribution system allows multiple channels to be played on multiple TV sets without the need to separately tune the TV sets using a remote control, which would potentially interfere with the channels being broadcast on nearby TV sets in an environment. A modulator dynamically duplicates the output of channels, thereby allowing multiple TV sets to be statically tuned to a fixed channel. The modulator can then duplicate the output so that a single input MPEG-2 transport stream can be sent out multiple channels and sub-channels to each of the desired TV sets.

主权项

1. A modulator comprising:
an input for receiving data packets corresponding to content; a buffer for storing the data packets in response to a direct memory access request; a descriptor module for creating descriptors for the packets stored in the buffer which indicate a location of each packet in the buffer and a length of each packet in the buffer; a memory for storing the descriptors created by the module for each of the packets in the buffer in a list; and an output for outputting the packets which are identified by the descriptors for further use of the content.