Communication apparatus and communication system

A communication apparatus comprising:

• a recovering section that receives a packet transmitted from a communication partner apparatus, and recovers, from the packet, Serial Data (SD) conforming to an Inter-IC Sound (I2S) standard, a bit width of the SD, a frequency of a sampling clock for sampling of an audio signal, a frequency ratio of a frequency of an audio master clock to the frequency of the sampling clock, a number of clocks of a first reference clock included in one cycle of a divided signal of the audio master clock, the frequency of the sampling clock, and a ratio of division of the divided signal to the audio master clock;
• an audio master clock regenerator that regenerates the audio master clock on a basis of the number of clocks of the first reference clock, a frequency of the first reference clock, and the ratio of division;
• and
• an Serial Clock (SCK) regenerator that regenerates an SCK on a basis of bit width information regarding the SD, the frequency ratio, and the audio master clock.