Transmitter and transmission method and receiver and reception method

A transmission method, comprising:

• transmitting data and switching information, wherein
• the data includes a clock signal,
• the switching information is based on a type of the data, and
• the switching information includes first information and second information,
• the first information indicates that a frequency of the clock signal is variable, and
• the second information indicates that the frequency of the clock signal is a specific frequency in a specific period;
• and
• controlling the frequency of the clock signal to reduce the frequency of the clock signal to the specific frequency in the specific period.

A receiver, comprising:

• a reception unit configured to receive data and switching information, wherein
• the data includes a clock signal,
• the switching information is based on a type of the data, and
• the switching information includes first information and second information,
• the first information indicates that a frequency of the clock signal is variable, and
• the second information indicates that the frequency of the clock signal is a specific frequency in a specific period;
• and
• a signal processing unit configured to reduce the frequency of the data received by the reception unit to the specific frequency in the specific period, based on the switching information notification received by the reception unit.

A reception method, comprising:

• receiving data and switching information, wherein
• the data includes a clock signal,
• the switching information is based on a type of the data, and
• the switching information includes first information and second information,
• the first information indicates that a frequency of the clock signal is variable, and
• the second information indicates that the frequency of the clock signal is a specific frequency in a specific period;
• and
• reducing the frequency of the received data to the specific frequency in the specific period, based on the received switching information.