Information processing device, image transmission method and image transmission program

An image transmission method causing a computer to execute a process comprising:

• updating, using a processor, an image that includes a desktop screen image displayed on a terminal device connected through a network, the image representing a processing result based on software and being stored into an image memory that stores an image;
• identifying, using the processor, in the image a high-frequency change area that is an area updated with a frequency not less than a predetermined threshold value during a predetermined period;
• encoding, using the processor, the high-frequency change area in a moving picture compression format;
• transmitting, using the processor, to the terminal device at least one of an encoded image of a change area in the image, the chance area being updated with a frequency less than the predetermined threshold value during the predetermined period and the encoded high-frequency change area, with adding time information thereto, the encoded high-frequency change area being transmitted at a first transmission interval;
• receiving, using the processor, the time information from the terminal device;
• determining, using the processor, based on a difference between the received time information and a reception time of the time information whether drawing delay of the desktop screen image occurs in the terminal device;
• and
• starting, using the processor, encoding the change area in a moving picture compression format when the drawing delay occurs or changing the first transmission interval to a second transmission interval longer than the first transmission interval when the drawing delay occurs and the encoded high-frequency change area is transmitted at the first transmission interval.

A non-transitory computer readable storage medium having stored therein a program that causes a computer to execute an image transmission process comprising:

• updating an image that includes a desktop screen image displayed on a terminal device connected through a network, the image representing a processing result based on software and being stored into an image memory that stores an image;
• identifying in the image a high-frequency change area that is an area updated with a frequency not less than a predetermined threshold value during a predetermined period;
• encoding the high-frequency change area in a moving picture compression format;
• transmitting to the terminal device at least one of an encoded image of a change area in the image, the change area being updated with a frequency less than the predetermined threshold value during the predetermined period and the encoded high-frequency change area, with adding time information thereto, the encoded high-frequency change area being transmitted at a first transmission interval;
• receiving the time information from the terminal device;
• determining based on a difference between the received time information and a reception time of the time information whether drawing delay of the desktop screen image occurs in the terminal device;
• and
• starting encoding the change area in a moving picture compression format when the drawing delay occurs or changing the first transmission interval to a second transmission interval longer than the first transmission interval when the drawing delay occurs and the encoded high-frequency change area is transmitted at the first transmission interval.