Patent ID: 8358706

Claim:
An image transmitting apparatus comprising: a plurality of input terminals through which data on digital frame images of one frames, and synchronous signals synchronized with the data on the digital frame images are inputted, respectively, within a predetermined period of time; a plurality of first frame buffers provided in correspondence to said plurality of input terminals, respectively; a write controlling portion which writes the data on the digital frame images inputted through said plurality of input terminals to the corresponding first frame buffers, respectively, based on the synchronous signals synchronized with the data on the digital frame images; a read clock generating portion which generates a read clock, a frequency of which is determined based on both the number of input terminals through which the data on the digital frame images is inputted and one write clock which is inputted together with the data on the input digital frame image, and is higher than a frequency of the write clock; a read controlling portion which successively enables only the first frame buffers to which the data on the digital frame image is written among said plurality of first frame buffers, only for a period of time the frame images are read out, reads out the data on the plurality of digital frame images written to said plurality of first frame buffers, respectively, within the predetermined period of time to multiplex the data on the plurality of digital frame images which is read out, into data on one frame, and outputs the multiplexed data and multiplex information representing accommodation positions of the data on the digital frame images accommodated in the multiplexed data based on the read clock generated by said read clock generating portion; an image compressing portion which encodes the data on the digital frame images accommodated in the multiplexed data and represented by the multiplex information; and an image transmitting portion which transmits the data on the digital frame images encoded by said image compressing portion.