Algorithms for determining bitrate for a statistical multiplexing system to account for signal complexity including film mode and gop structural changes

A statistical multiplexing system comprising:

• encoders for coding a plurality of channels of video data sources;
• a multiplexer for receiving the output of the encoders and providing from the output of the encoders a single data stream;
• and
• a statistical multiplexer (statmux) controller for receiving need parameter data from the encoders and for providing to the encoders bit rate data based on the need parameter data,
• wherein each of the encoders comprises a processor and a memory for storing code to enable the processor to encode data and to determine and provide parameters for determining the need parameter to the statmux controller, the code causing the processor to perform the following steps:
• determining a frames per second arrival rate for frames of data arriving at the encoder;
• determining the decode time stamp (DTS) from a first frame in a look ahead buffer of the encoder;
• and
• providing the decode time stamp and the frames per second rate from the encoder to the statmux controller as part of the need parameter data to enable a statmux controller in the statmux system to determine the bit rate data.

A statistical multiplexing system comprising:

• encoders for coding a plurality of channels of video data sources;
• a multiplexer for receiving the output of the encoders and providing from the output of the encoders a single data stream;
• and
• a statistical multiplexer (statmux) controller for receiving need parameter data from the encoders and for providing to the encoders bit rate data based on the need parameter data,
• wherein each of the encoders comprises a processor and a memory for storing code to enable the processor to encode data and to determine and provide parameters for determining the need parameter to the statmux controller, the code causing the processor to perform the following steps:
• determining a number of pictures (N) between I type pictures in data provided to the encoder;
• and
• providing the N values as part of need parameter data to the statmux controller.

A statistical multiplexing system comprising:

• encoders for coding a plurality of channels of video data sources;
• a multiplexer for receiving the output of the encoders and providing from the output of the encoders a single data stream;
• and
• a statistical multiplexer (statmux) controller for receiving need parameter data from the encoders and for providing to the encoders bit rate data based on the need parameter data,
• wherein each of the encoders comprises a processor and a memory for storing code to enable the processor to encode data and to determine and provide parameters for determining the need parameter to the statmux controller, the code causing the processor to perform the following steps:
• determining a number of pictures (M) between P type pictures in the data provided to the encoder;
• and
• providing the M values as part of need parameter data to the statmux controller.