Transmission device and method of determining transmission date format
First Claim
1. A transmission device comprising:
- a communication unit that broadcasts content data to a plurality of reception devices and performs an information transmission to and an information reception from the plurality of reception devices; and
a format determining unit that determines a transmission data format of the content data that is a transmission object to be broadcast by the communication unit, based on information, which is acquired from the plurality of reception devices via the communication unit, of a data format with which each of the plurality of reception devices are compatible,wherein the format determining unit creates a common list that is a list of the data format commonly compatible with the plurality of reception devices, based on the information, which is acquired from the plurality of reception devices, of the data format with which the plurality of reception devices is compatible, respectively,when the data format of the content data that is the transmission object is present in the common list, the format determining unit determines the data format as the transmission data format, andwhen the data format of the content data that is the transmission object is not present in the common list, the format determining unit determines a data format of a mandatory standard as the transmission data format,in which the common list includes at least one of (i) a number of compatible video data formats that are commonly compatible with the plurality of reception devices or (ii) a number of compatible audio data formats that are commonly compatible with the plurality of reception devices,in which the data format represents at least one of (i) a video data format or (ii) an audio data format, that each of the plurality of reception devices is compatible with during operation, andwhen the content data is video data, the common list for a video format created by the format determining unit represents (i) a common color format type or types, (ii) a common video format code type or types, and (iii) a common deep color mode type or types, each type within the common color format and the common video format code and the common deep color mode types being arranged in a respective predetermined priority order, so that when a respective video format having a respective priority higher than that of the video data that is the transmission object is present in the common list, the format determining unit determines that the respective video format with the respective higher priority is a transmission video format.
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Abstract
To allow a broadcast transmission to be preformed successfully.
A source device 10 reads out EDID from EDID ROMs 30a-1 to 30a-N of sink devices 30-1 to 30-N, respectively, by using information transmitting and receiving function. The source device 10 determines a transmission data format in an AV stream so as to be compatible with all of the sink devices 30-1 to 30-N, based on data format information in the EDID. The source device 10 broadcasts the AV stream based on the transmission data format determined as described above to the sink devices 30-1 to 30-N. The sink devices 30-1 to 30-N receive the AV stream broadcast from the source device 10. Since the transmission data format of the AV stream is compatible with all of the sink devices 30-1 to 30-N, all of the sink devices 30-1 to 30-N can successfully reproduce the received AV stream.
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Citations
9 Claims
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1. A transmission device comprising:
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a communication unit that broadcasts content data to a plurality of reception devices and performs an information transmission to and an information reception from the plurality of reception devices; and a format determining unit that determines a transmission data format of the content data that is a transmission object to be broadcast by the communication unit, based on information, which is acquired from the plurality of reception devices via the communication unit, of a data format with which each of the plurality of reception devices are compatible, wherein the format determining unit creates a common list that is a list of the data format commonly compatible with the plurality of reception devices, based on the information, which is acquired from the plurality of reception devices, of the data format with which the plurality of reception devices is compatible, respectively, when the data format of the content data that is the transmission object is present in the common list, the format determining unit determines the data format as the transmission data format, and when the data format of the content data that is the transmission object is not present in the common list, the format determining unit determines a data format of a mandatory standard as the transmission data format, in which the common list includes at least one of (i) a number of compatible video data formats that are commonly compatible with the plurality of reception devices or (ii) a number of compatible audio data formats that are commonly compatible with the plurality of reception devices, in which the data format represents at least one of (i) a video data format or (ii) an audio data format, that each of the plurality of reception devices is compatible with during operation, and when the content data is video data, the common list for a video format created by the format determining unit represents (i) a common color format type or types, (ii) a common video format code type or types, and (iii) a common deep color mode type or types, each type within the common color format and the common video format code and the common deep color mode types being arranged in a respective predetermined priority order, so that when a respective video format having a respective priority higher than that of the video data that is the transmission object is present in the common list, the format determining unit determines that the respective video format with the respective higher priority is a transmission video format. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of determining a transmission data format in a transmission device that broadcasts content data to a plurality of reception devices and performs an information transmission to and an information reception from the plurality of reception devices, the method comprising:
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an information acquisition step of acquiring information of a data format, with which the plurality of reception devices are compatible, from the plurality of reception devices; and a format determination step of determining the transmission data format of the content data that is broadcast to the plurality of reception devices based on the data format information acquired at the information acquiring step, wherein, in the format determination step, a common list that is a list of the data format commonly compatible with the plurality of reception devices is created, based on the information, which is acquired from the plurality of reception devices, of the data format with which each of the plurality of reception devices is compatible, respectively, when the data format of the content data that is the transmission object is present in the common list, the data format is determined as the transmission data format, and when the data format of the content data that is the transmission object is not present in the common list, a data format of a mandatory standard is determined as the transmission data format, in which the common list includes at least one of (i) a number of compatible video data formats that are commonly compatible with the plurality of reception devices or (ii) a number of compatible audio data formats that are commonly compatible with the plurality of reception devices, in which the data format represents at least one of (i) a video data format or (ii) an audio data format, that each of the plurality of reception devices is compatible with during operation, and when the content data is video data, the common list for a video format created by the format determination step represents (i) a common color format type or types, (ii) a common video format code type or types, and (iii) a common deep color mode type or types, each type within the common color format and the common video format code and the common deep color mode types being arranged in a respective predetermined priority order, so that when a respective video format having a respective priority higher than that of the video data that is the transmission object is present in the common list, the format determination step determines that the respective video format with the respective higher priority is a transmission video format.
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Specification