Transmission device and camera device operating with serial signals corresponding to clock signals having different frequencies

A camera device comprising:

• an image pickup section which generates a picked-up image signal;
• and
• a communication section which transmits a serial signal which is generated by serially converting the image signal based on a clock signal of a frequency selected from a plurality of frequencies used as clock components of the serial signal and includes the clock signal of the selected frequency,
• wherein the communication section includes
• a transceiving unit which transceives the serial signal;
• a clock recovering unit which receives the serial signal received by the transceiving unit and recovers a recovered clock signal from the serial signal;
• a match determination unit which receives the recovered clock signal recovered by the clock recovering unit and determines whether or not a frequency of the recovered clock signal matches each of the plurality of frequencies;
• a frequency controller which, if the match determination unit determines that the frequency of the recovered clock signal matches each of the plurality of frequencies, performs a control to determine the frequency of the recovered clock signal recovered in the clock recovering unit as the matching frequency, and
• a converting unit which serially converts data based on the clock signal to transmit the serially converted signal to the transceiving unit,
• the frequency of the recovered dock signal recovered in the clock recovering unit is switched between the plurality of frequencies until the frequency is determined by the frequency controller,
• wherein the converting unit converts a predetermined command data corresponding to a predetermined one of the plurality of frequencies based on the clock signal of the determined frequency and transmits the converted command data from the transceiving unit, and
• if there is a predetermined response to the command data, the frequency of the clock signal used by the converting unit is switched to the predetermined frequency.

A camera controller comprising:

• a transceiving unit which can be connected to a camera device and transceives a serial signal including a clock signal of a frequency selected from a plurality of frequencies used as clock components of the serial signal between the transceiving unit and the camera device;
• a clock recovering unit which receives the serial signal received by the transceiving unit and recovers a recovered clock signal from the serial signal;
• a match determination unit which receives the recovered clock signal recovered by the clock recovering unit and determines whether or not a frequency of the recovered clock signal matches each of the plurality of frequencies;
• a frequency controller which, if the match determination unit determines that the frequency of the recovered clock signal matches each of the plurality of frequencies, performs a control to determine the frequency of the recovered clock signal recovered in the clock recovering unit as the matching frequency;
• and
• a converting unit which serially converts data based on the clock signal to transmit the serially converted signal to the transceiving unit,
• wherein the frequency of the recovered clock signal recovered in the clock recovering unit is switched between the plurality of frequencies until the frequency is determined by the frequency controller,
• wherein the converting unit converts a predetermined command data corresponding to a predetermined one of the plurality of frequencies based on the clock signal of the determined frequency and transmits the converted command data from the transceiving unit, and
• if there is a predetermined response to the command data, the frequency of the clock signal used by the converting unit is switched to the predetermined frequency.

A camera system comprising:

• a camera device which transmits a serial signal of a picked-up image;
• and
• a camera controller which is connected to the camera device, transmits a serial signal including a clock signal of a frequency selected from a plurality of frequencies used as clock components of the serial signal, and receives a serial signal of an image serially converted by the transmitted clock signal of the selected frequency from the camera device,
• wherein at least one of the camera device and the camera controller includes
• a first transceiving unit which transceives the serial signal;
• a first clock recovering unit which receives the serial signal received by the first transceiving unit and recovers a first recovered clock signal from the serial signal;
• a first match determination unit which receives the first recovered clock signal recovered by the first clock recovering unit and determines whether or not a frequency of the first recovered clock signal matches each of the plurality of frequencies;
• a first frequency controller which, if the first match determination unit determines that the frequency of the first recovered clock signal matches each of the plurality of frequencies, performs a control to determine the frequency of the first recovered clock signal recovered in the first clock recovering unit as the matching frequency, and
• a converting unit which serially converts data based on the clock signal to transmit the serially converted signal to the first transceiving unit,
• the frequency of the first recovered clock signal recovered in the first clock recovering unit is switched between the plurality of frequencies until the frequency is determined by the first frequency controller
• wherein the converting unit converts a predetermined command data corresponding to a predetermined one of the plurality of frequencies based on the clock signal of the determined frequency and transmits the converted command data from the first transceiving unit, and
• if there is a predetermined response to the command data, the frequency of the clock signal used by the converting unit is switched to the predetermined frequency.