Patent ID: 8422547

Claim:
A signal transmission apparatus, comprising: a two-pixel sampling out control section adapted to sample out, when transmitting an image signal wherein the number of pixels of one frame exceeds a pixel number prescribed by an HD-SDI format whose pixel number of one frame is 4096 in the maximum.times.2160 in the maximum, two pixels adjacent each other on the same line from among pixel samples extracted from each frame defined by the image signal, sample out the pixel samples on each odd-numbered line of each frame alternately into a first sub image and a second sub image from among first to fourth sub images prescribed by the SMPTE 435-1 and sample out the pixel samples on each of even-numbered lines of each frame alternately into the third sub image and the fourth sub image to map the pixel samples to the first to fourth sub images; a word sampling out control section adapted to sample out the pixel samples sampled out into the first to fourth sub images for each word to map the first to fourth sub images to an active period of every two HD-SDIs of the mode B prescribed by the SMPTE 435-2; a multiplexing section adapted to multiplex, in the case where the image signal includes ANC/audio data, the ANC/audio data in a horizontal auxiliary data space of the HD-SDIs of the mode B formed based on the first to fourth sub images in a channel order of the HD-SDIs; and a readout control section adapted to output the HD-SDIs of the mode B.