Transmission method, transmission system, sending device and reception device
View Patent ↗Digital audio data which have a predetermined packet structure are divided into units including a predetermined number of bits; each unit of the divided digital audio data is converted into specific data to be encoded; the encoded data are arranged in blanking intervals of video data; the digital audio data are transmitted as well as the video data using a transmission line for the video data, and the video data and the audio data may be simultaneously and favorably transmitted, adopting an existing video-data transmission format such as the DVI standard.
1. A data receiving method for receiving image data via first, second and third channels; wherein synchronizing signal data is provided in a blanking period of the first channel and control information is provided in the blanking period of the second and/or third channels; the method comprising the steps of:
receiving image data;
wherein said control information in the blanking period of the second and/or third channels of the image data has been replaced with encoded data units;
wherein each encoded data unit is one of plural predefined kinds of specific data;
wherein the encoded data units have been encoded by dividing packets of digital audio data by a predetermined number of bits;
wherein each packet of digital audio data has a parity code;
separating the encoded data units which are arranged in the blanking period of the second and/or third channels;
decoding the separated encoded data units;
performing error detection on the decoded data units by detecting errors in the predefined kinds of specific data; and
assembling the decoded data units into packets of digital audio data; the assembled packets having error flags marking the detected errors.
2. A data receiving apparatus for receiving image data via first, second and third channels; wherein synchronizing signal data is provided in a blanking period of the first channel and control information is provided in the blanking period of the second and/or third channels; the apparatus comprising:
receiving means for receiving image data;
wherein said control information in the blanking period of the second and/or third channels of the image data has been replaced with encoded data units;
wherein each encoded data unit is one of plural predefined kinds of specific data;
wherein the encoded data units have been encoded by dividing packets of digital audio data by a predetermined number of bits;
wherein each packet of digital audio data has a parity code;
separating means for separating the encoded data units which are arranged in the blanking period of the second and/or third channels;
decoding means for decoding the separated encoded data units and for performing error detection on the decoded data units by detecting errors in the predefined kinds of specific data; and
data assembly means for assembling the decoded data units into packets of digital audio data; the assembled packets having error flags marking the detected errors.
3. A data receiving method for receiving image data via first, second and third channels; wherein synchronizing signal data is provided in a blanking period of the first channel and control information is provided in the blanking period of the second and/or third channels; the method comprising the steps of:
receiving image data;
wherein said image data includes specific data in the blanking period of the second channel; wherein said specific data has been previously generated by:
combining a plurality of digital audio data units, wherein each digital audio data unit includes a parity code;
extracting predetermined lengths of data from the combined digital audio data units;
forming data units with the extracted lengths of data; and
converting each data unit into one of plural predefined kinds of specific data;
separating the specific data in blanking intervals of the image data of the second and/or third channels;
decoding the separated specific data;
performing error detection on the decoded data by detecting errors in the predefined kinds of specific data; and
assembling the decoded data into packets of digital audio data; the assembled packets having error flags marking the detected errors.
4. A data receiving apparatus for receiving image data via first, second and third channels; wherein synchronizing signal data is provided in a blanking period of the first channel and control information is provided in the blanking period of the second and/or third channels; the apparatus comprising:
receiving means for receiving image data;
wherein said image data includes specific data in the blanking period of the second channel; wherein said specific data has been previously generated by:
combining a plurality of digital audio data units, wherein each digital audio data unit includes a parity code;
extracting predetermined lengths of data from the combined digital audio data units;
forming data units with the extracted lengths of data; and
converting each data unit into one of plural predefined kinds of specific data;
separating means for separating the specific data in blanking intervals of the image data of the second and/or third channels;
decoding means for decoding the separated specific data and performing error detection on the decoded data by detecting errors in the predefined kinds of specific data; and
assembly means for assembling the decoded data into packets of digital audio data; the assembled packets having error flags marking the detected errors.