Patent ID: 7551235
Filing Date: 2009-06-23
Classification: H04N

Abstract:
1. An image switching apparatus comprising: an image processing unit for selecting a video signal from inputted video signals of a plurality of channels and switching an outputted video signal from a certain selected video signal to other selected video signal, a control unit for controlling said image processing unit; and an operation unit including operation means connected to said control unit through a communication channel to operate said image processing unit, wherein said image processing unit includes a main circuit block and sub circuit blocks different from said main circuit block as circuit blocks for carrying out said processing, said main circuit block includes designation means for designating that one of said sub circuit blocks is to be operated or that both of said main circuit block and said sub circuit blocks are to be operated, said operation unit transmits a signal to designate operation of said main circuit block to said control unit based on operation of said operation means when said main circuit block is designated by said designation means, said operation unit transmits a signal to designate operation of said sub circuit block to said control unit based on operation of said operation means when said sub circuit block is designated by said designation means and said operation unit transmits a signal to designate operations of both of said main circuit block and said sub circuit block to said control unit based on operation of said operation means when both of said main circuit block and said sub circuit block are designated by said designation means and said control unit controls a circuit of which operation is designated by a signal from said operation unit from said main circuit block and said sub circuit block.