Signal processing apparatus and signal processing method for data transmission

A signal processing method comprising:

• receiving a predetermined number of items of data and a first enable signal, wherein the first enable signal has an active state in an interval where data is valid in synchronization with a first clock;
• counting, with a second clock faster than said first clock being a reference, a number of clock signals in an interval where said first enable signal is inactive;
• putting setting a second enable signal to an active state for a predetermined number of clock signals of said second clock, and setting said second enable signal to an inactive state for said counted number of clock signals;
• outputting said second enable signal;
• and
• outputting said predetermined number of items of data in synchronization with said second clock in an interval where said second enable signal is active.

A signal processing apparatus comprising:

• an input block configured to receive a predetermined number of items of data and a first enable signal having an active state in an interval where data is valid in synchronization with a first clock;
• a count block configured to count, with a second clock faster than said first clock being reference, a number of clocks in an interval where said first enable signal is inactive;
• an enable signal control block configured to put a second enable signal in an active state for a number of clocks equal to a predetermined number with said second clock being reference, and put said second enable signal in an inactive state for the number of clocks counted by said count block;
• an enable signal output block configured to output said second enable signal;
• a data output block configured to output said predetermined number of items of data in synchronization with said second clock in an interval where said second enable signal is active,
• wherein said count block counts a number of clocks of an interval obtained by combining an interval where said first enable signal is active and another interval following said interval where said first enable signal is inactive, thereby using a value obtained by subtracting a predetermined value from said number of clocks as said number of clocks of said interval where said first enable signal is inactive.