Signal transmission and reception system, reception device, and reception method

A reception device that receives a transmission signal including an encoded signal in which transmission data is converted into a Manchester code as a switching edge from a transmission device on the basis of a transmission clock, comprising:

• a high-speed clock generation circuit configured to generate a high-speed clock faster than the transmission clock;
• an edge detection circuit configured to detect an edge of the transmission signal on the basis of the high-speed clock;
• and
• a signal detection circuit configured to detect the edge detected in a period sandwiched between a first elapsed time at which a first period has elapsed from a start point and a second elapsed time at which a second period longer than the first period has elapsed from the start point as the switching edge,
• wherein the signal detection circuit has a first counter and a second counter that operate in synchronization with the high-speed clock, detects the first elapsed time at which the first period has elapsed from the start point using the first counter, and detects the second elapsed time at which the second period has elapsed from the start point using the second counter.

A reception method for receiving a transmission signal including an encoded signal in which transmission data is converted into a Manchester code as a switching edge from a transmission device on the basis of a transmission clock, comprising:

• a high-speed clock generation process of generating a high-speed clock faster than the transmission clock;
• an edge detection process of detecting an edge of the transmission signal on the basis of the high-speed clock;
• a signal detection process of detecting the edge detected in a period sandwiched between a first elapsed time at which a first period has elapsed from a start point and a second elapsed time at which a second period longer than the first period has elapsed from the start point as the switching edge;
• a first elapsed time detection process of detecting the first elapsed time at which the first period has elapsed from the start point using a first counter that operates in synchronization with the high-speed clock;
• and
• a second elapsed time detection process of detecting the second elapsed time at which the second period has elapsed from the start point using a second counter that operates in synchronization with the high-speed clock.