Transmitting apparatus, receiving apparatus, communication system, communication method and program

A transmitting apparatus, comprising:

• an image superimposition section that generates a superimposed image data by superimposing a user interface image generated based on a first control data used to control a user interface onto a content image;
• an image compression section that encodes the superimposed image data generated by the image superimposition section;
• a multiplexing section that multiplexes a second control data used to control communication with the superimposed image data encoded by the image compression section;
• and
• a communication section that transmits the superimposed image data multiplexed with the second control data by the multiplexing section.

A receiving apparatus, comprising:

• a communication section that receives a superimposed image data generated by superimposing a user interface image generated based on a first control data used to control a user interface onto a content image and multiplexed with a second control data used to control communication;
• a separation section that separates the second control data from the superimposed image data received by the communication section;
• and
• an image decoding section that decodes the superimposed image data from which the second control data is separated by the separation section.

A communication system, comprising:

• a transmitting apparatus, including:
• an image superimposition section that generates a superimposed image data by superimposing a user interface image generated based on a first control data used to control a user interface onto a content image;
• an image compression section that encodes the superimposed image data generated by the image superimposition section per an encoding unit corresponding to N lines in one field (N is equal to or greater than 1);
• and
• a transmitting-side communication section that transmits the superimposed image data encoded by the image compression section;
• and
• a receiving apparatus, including:
• a receiving-side communication section that receives the superimposed image data transmitted by the transmitting apparatus;
• and
• an image decoding section that decodes the superimposed image data received by the receiving-side communication section per the encoding unit.

A communication method, comprising the steps of:

• generating superimposed image data by superimposing a user interface image generated based on a first control data used to control a user interface onto a content image in a transmitting apparatus;
• encoding the generated superimposed image data per an encoding unit corresponding to N lines in one field (N is equal to or greater than 1);
• transmitting the encoded superimposed image data from the transmitting apparatus to a receiving apparatus;
• receiving the superimposed image data transmitted by the transmitting apparatus in the receiving apparatus;
• and
• decoding the received superimposed image data per the encoding unit.

A computer program product having instructions that cause a computer, which controls a transmitting apparatus, to function as:

• an image superimposition section that generates a superimposed image data by superimposing a user interface image generated based on a first control data used to control a user interface onto a content image;
• an image compression section that encodes the superimposed image data generated by the image superimposition section per an encoding unit corresponding to N lines in one field (N is equal to or greater than 1);
• and
• a communication section that transmits the superimposed image data encoded by the image compression section.