Content playback device, content playback method and content playback program
The present disclosure is intended to enable playback of media data corresponding to a sensibility effect set in advance. A content playback device ( 91 ) of the present disclosure includes: a device table production unit ( 10 ) holding a device table in which a format of media data that can be played back and a device parameter are determined for each device; a media table production unit ( 20 ) configured to acquire metadata including the format and a sensibility effect label of the media data, determine a mapping evaluation scale that is a device parameter corresponding to the sensibility effect label, and produce a media table in which the mapping evaluation scale and the format are determined for each media data; and a mapping determination unit ( 30 ) configured to extract, based on the formats, a combination pattern of a device on which media data can be played back and the media data, select, from among extracted combination patterns, a combination pattern for which a relative error between the device parameter and the mapping evaluation scale is minimum, and select a device that is an output destination of the media data.
1. A content playback device comprising:
a processor; and
a storage medium having computer program instructions stored thereon, when executed by the processor, perform to:
hold a device table in which a format of media data that can be played back and a device parameter used at playback of the media data are determined for each device;
acquire metadata including the format and a sensibility effect label of the media data, determine a mapping evaluation scale that is a device parameter corresponding to the sensibility effect label in accordance with a conversion table in which a value of a device parameter is determined for each combination of a sensibility effect label and a format, and produce a media table in which the mapping evaluation scale and the format are determined for each media data; and
extract, based on the formats included in the device table and the media table, a combination pattern of a device that is included in the device table and on which media data included in the media table can be played back and the media data included in the media table, select, from among extracted combination patterns, a combination pattern for which a relative error between a device parameter included in the device table and a mapping evaluation scale included in the media table is minimum, and select a device that is an output destination of the media data.
2. The content playback device according to claim 1 , wherein the mapping evaluation scale includes an overall weight that determines priority of the media data, and
wherein the computer program instructions further perform to calculates a relative error with regard to each mapping evaluation scale by using a device parameter included in the device table, and calculates a relative error between a device parameter included in the device table and a mapping evaluation scale included in the media table by calculating the sum of a relative error obtained by multiplying the relative error of each mapping evaluation scale by the overall weight.
3. The content playback device according to claim 1 , wherein the computer program instructions further perform to output the media data corresponding to the combination pattern of the device and the media data,
convert the format of media data, and
includes, as a format in the device table, a format that can be converted and extracts the combination pattern.
4. The content playback device according to claim 1 , wherein
a device parameter included in the device table includes a range in which the device parameter can be varied at the device, and
wherein the computer program instructions further perform to calculates the relative error between a device parameter included in the device table and a mapping evaluation scale included in the media table by using, in the range in which the device parameter included in the device table can be varied, a device parameter nearest to the mapping evaluation scale included in the media table.
5. The content playback device according to claim 1 , wherein
the metadata includes a relative relation with other media data,
the conversion table in which a value of a device parameter is determined for each combination of a sensibility effect label and a format includes a mapping evaluation scale indicating a relative relation with media data having the relative relation, and
wherein the computer program instructions further perform to calculates a relative error between a device parameter included in the device table and a mapping evaluation scale included in the media table by using the mapping evaluation scale indicating the relative relation with media data having the relative relation.
6. A content playback method comprising:
holding a device table in which a format of media data that can be played back and a device parameter used at playback of media are determined for each device;
acquiring metadata including the format and a sensibility effect label of the media data, determining a mapping evaluation scale that is a device parameter corresponding to the sensibility effect label in accordance with a conversion table in which a value of a device parameter is determined for each combination of a sensibility effect label and a format, and producing a media table in which the mapping evaluation scale and the format are determined for each media data; and
extracting, based on the formats included in the device table and the media table, a combination pattern of a device that is included in the device table and on which media data included in the media table can be played back and the media data included in the media table, selecting, from among extracted combination patterns, a combination pattern for which a relative error between a device parameter included in the device table and a mapping evaluation scale included in the media table is minimum, and selecting a device that is an output destination of the media data.
7. The method of claim 6 wherein the mapping evaluation scale includes an overall weight that determines priority of the media data, and further comprises calculating a relative error with regard to each mapping evaluation scale by using a device parameter included in the device table, and calculating a relative error between a device parameter included in the device table and a mapping evaluation scale included in the media table by calculating the sum of a relative error obtained by multiplying the relative error of each mapping evaluation scale by the overall weight.
8. The method of claim 6 further comprises outputting, to the device selected by the mapping determination unit, the media data corresponding to the combination pattern of the device and the media data.
9. The method of claim 6 wherein a device parameter included in the device table includes a range in which the device parameter can be varied at the device, and further comprises calculating the relative error between a device parameter included in the device table and a mapping evaluation scale included in the media table by using, in the range in which the device parameter included in the device table can be varied, a device parameter nearest to the mapping evaluation scale included in the media table.
10. The method of claim 6 the metadata includes a relative relation with other media data, the conversion table in which a value of a device parameter is determined for each combination of a sensibility effect label and a format includes a mapping evaluation scale indicating a relative relation with media data having the relative relation, and further comprises calculating a relative error between a device parameter included in the device table and a mapping evaluation scale included in the media table by using the mapping evaluation scale indicating the relative relation with media data having the relative relation.