Method and device for sending and receiving data and data transmission system

A data receiving method, comprising:

• receiving a compressed data with a compressed data amount via a HDMI bus, wherein said compressed data is obtained by compressing a first data and a second data corresponding to a transmission unit of pixel with HDMI transmission format, said first data having a first data amount which is equal to the data amount of said transmission unit of pixel, the first data is multimedia data of one pixel corresponding to the HDMI transmission format and for displaying a first picture, the second data contains information for controlling transparencies of different sub areas of the first picture of the first data of the corresponding transmission unit of pixel, wherein at least one sub area having different transparency from those of the other sub areas, said compressed data amount being equal to or smaller than the data amount of said transmission unit;
• decompressing the received compressed data so as to obtain a fourth data and a fifth data,
• receiving a third data for displaying a second picture via the HDMI bus,
• wherein said fourth data corresponds to said first data, and said fifth data corresponds to said second data,
• wherein the different sub areas of the first picture and the second picture are mixed based on the different transparencies of different sub areas of the first picture controlled by the information contained in the second data.

A data sending apparatus, comprising:

• a first acquiring module for acquiring a first data corresponding to a transmission unit of pixel with HDMI transmission format, wherein said first data has a first data amount which is equal to the data amount of said transmission unit of pixel, and the first data is multimedia data of one pixel corresponding to the HDMI transmission format and for displaying a first picture;
• a second acquiring module for acquiring a second data which corresponds to said first data of said transmission unit of pixel and has a second data amount, and the second data contains information for controlling transparencies of different sub areas of the first picture of the first data of the corresponding transmission unit of pixel, wherein at least one sub area having different transparency from those of the other sub areas;
• a compressing module for compressing the first data acquired by said first acquiring module and the second data acquired by said second acquiring module so as to obtain a compressed data with a compressed data amount, wherein said compressed data amount is equal to or smaller than the data amount of said transmission unit of pixel;
• a sending module for sending the compressed data compressed by said compressing module via a HDMI bus so as to display the first picture;
• and
• the sending module further for sending a third data for displaying a second picture via the HDMI bus,
• wherein the different sub areas of the first picture and the second picture are mixed based on the different transparencies of different sub areas of the first picture controlled by the information contained in the second data.

A data receiving apparatus, comprising:

• a receiving module for receiving a compressed data with a compressed data amount via a HDMI bus, wherein said compressed data is obtained by compressing a first data and a second data corresponding to a transmission unit of pixel with HDMI transmission format, said first data having a first data amount which is equal to the data amount of said transmission unit of pixel, the first data is multimedia data of one pixel corresponding to the HDMI transmission format and for displaying a first picture, the second data contains information for controlling transparencies of different sub areas of the first picture of the first data of the corresponding transmission unit of pixel, wherein at least one sub area having different transparency from those of the other sub areas, said compressed data amount being equal to or smaller than the data amount of said transmission unit;
• a decompressing module for decompressing the compressed data received by said receiving module so as to obtain a fourth data and a fifth data,
• the receiving module further for receiving a third data for displaying a second picture via the HDMI bus,
• wherein said fourth data corresponds to said first data, and said fifth data corresponds to said second data,
• wherein the different sub areas of the first picture and the second picture are mixed based on the different transparencies of different sub areas of the first picture controlled by the information contained in the second data.

A data transmitting system, comprising a sending apparatus and a receiving apparatus,

• said sending apparatus comprising:
• a first acquiring module for acquiring a first data corresponding to a transmission unit of pixel with HDMI transmission format, wherein said first data has a first data amount which is equal to the data amount of said transmission unit of pixel, and the first data is multimedia data of one pixel corresponding to the HDMI transmission format and for displaying a first picture;
• a second acquiring module for acquiring a second data which corresponds to said first data of said transmission unit of pixel and has a second data amount, and the second data contains information for controlling transparencies of different sub areas of the first picture of the first data of the corresponding transmission unit of pixel, wherein at least one sub area having different transparency from those of the other sub areas;
• a compressing module for compressing the first data acquired by said first acquiring module and the second data acquired by said second acquiring module so as to obtain a compressed data with a compressed data amount, wherein said compressed data amount is equal to or smaller than the data amount of said transmission unit of pixel;
• a sending module for sending the compressed data compressed by said compressing module,
• the sending module further for sending a third data for displaying a second picture via the HDMI bus,
• wherein the different sub areas of the first picture and the second picture are mixed based on the different transparencies of different sub areas of the first picture controlled by the information contained in the second data,
• said receiving apparatus comprising:
• a receiving module for receiving the compressed data with the compressed data amount, wherein said compressed data is obtained by compressing the first data and the second data corresponding to the transmission unit with the HDMI transmission format, said first data having the first data amount which is equal to the data amount of said transmission unit of pixel, said compressed data amount being equal to or smaller than the data amount of said transmission unit of pixel;
• a decompressing module for decompressing the compressed data received by said receiving module so as to obtain a fourth data and a fifth data,
• wherein said fourth data corresponds to said first data, and said fifth data corresponds to said second data.