Systems and methods for multimedia signal processing and transmission

A method implemented on a computing device having at least one processor and at least one non-transitory computer-readable storage medium, comprising:

• receiving a composite multimedia signal in a frame format, the composite multimedia signal being generated based on at least two multimedia signals that are received from a plurality of channels, wherein at least one of the at least two multimedia signals includes a video signal, the frame format includes an active zone and a blanking zone, the active zone is configured to encode analog signals converted from at least part of the at least two multimedia signals, and the blanking zone is configured to encode format information, the size of the blanking zone of the frame format being smaller than 10 bytes;
• demodulating the composite multimedia signal according to the format information;
• and
• transmitting the demodulated composite multimedia signal to one or more output devices, wherein the demodulating the composite multimedia signal according to the format information comprises:
• converting the analog signals in the active zone into digital signals.

A system, for transmitting a composite multimedia signal, comprising:

• a non-transitory computer-readable storage medium storing a set of instructions;
• at least one processor in communication with the non-transitory computer-readable storage medium, wherein when executing the set of instructions, the at least one processor is configured to cause the system to:
• receive at least two multimedia signals from a plurality of channels, wherein at least one of the at least two multimedia signals includes a video signal;
• generate a composite multimedia digital signal by coding the at least two multimedia signals in a frame format, the frame format including an active zone and a blanking zone, the active zone being configured to encode at least part of the at least two multimedia signals, and the blanking zone being configured to encode format information, the size of the blanking zone of the frame format being smaller than 10 bytes;
• convert at least part of the encoded multimedia signals in the active zone into analog signals to generate a composite multimedia signal;
• and
• transmit the composite multimedia signal to a receiving device via a transmission medium.