In a communication system incorporating a communication apparatus that transfers/receives a TS packet using MPEG-2-TS to synchronize a video signal with an audio signal includes a communication circuit to pad the TS packet with a null frame to reach a prescribed frame size when storing the TS packet that includes a PCR value in a frame. In the communication apparatus, the communication circuit deletes the null frame in the TS packet when receiving the TS packet. The communication apparatus further includes an encoder that outputs a PCR report signal that indicates that the generated TS packet includes the PCR value to the communication circuit. In the communication apparatus, the size of the frame is set in multiples of the size of the TS packet. The communication apparatus further includes an input device to configure whether the TS packet is padded automatically or manually.