Transmission apparatus of video information, transmission system of video information and transmission method of video information

A transmission apparatus for video information characterized by having:

• an input part for inputting video information transmitted by a central processing unit;
• a level information generation part for generating level information of each pixel on a screen based on, at least, said video information;
• a memory part for storing level information of each pixel of the entire region of the screen;
• a comparison part for comparing level information stored in said memory part with level information outputted by said level information generation part with respect to said pixel associated with said video information and for outputting comparison information;
• a region extraction part for extracting a region that includes a pixel wherein the level information stored in said memory part and the level information based on said video information are different according to said comparison information;
• an update region level information generation part for generating differential information between the level information stored in said memory part and the level information outputted by said level information generation part with respect to each pixel of said extracted region of the screen;
• a compression part for compressing the information amount of said differential information;
• and
• a communication part for transmitting position information of said region of the screen and said compressed differential information.

A transmission method for video information characterized by having:

• an input step for inputting video information transmitted by a central processing unit;
• a level information generation step for generating the level information of each pixel on a screen based on, at least, said video information;
• a comparison step for comparing level information stored in a memory part with level information generated in said level information generation step in respect to said pixel associated with said video information and for generating comparison information;
• a region extraction step for extracting a region that includes a pixel wherein the level information stored in said memory part and the level information based on said video information are different according to said comparison information;
• a compression step for compressing the information amount of the level information of each pixel of said extracted region of the screen;
• and
• a communication step for transmitting position information of said region of the screen and said compressed level information.

A transmission method for video information characterized by having:

• an input step for inputting video information transmitted by a central processing unit;
• a level information generation step for generating level information of each pixel on the screen based on, at least, said video information;
• a comparison step for comparing the level information stored in a memory part with the level information generated in said level information generation step with respect to said pixel associated with said video information and for generating comparison Information;
• a region extraction step for extracting a region which includes a pixel wherein the level information stored iii said memory and the level information based on said video Information are different according to said comparison Information;
• an update region level information generation step for generating differential information between the level information stored in said memory part and the level information generated in said level information generation step with respect to each pixel of said extracted region of the screen;
• a compression step for compressing the information
• amount of said differential information;
• and a communication step for transmitting position
• information of said region of the screen and said compressed differential information.