Method and device for transmitting and receiving broadcast signal for broadcast service on basis of XML subtitle
First Claim
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1. A method of processing a broadcast signal in a broadcast transmitter, the method comprising:
- encoding video data that correspond to at least one of SD resolution, HD resolution, and UHD resolution;
encoding Extensible Mark-up Language (XML) subtitle data having a first aspect ratio,wherein the XML subtitle data includes subtitle text and subtitle metadata,wherein the subtitle metadata includes high dynamic range (HDR) information of the XML subtitles, andwherein the HDR information includes a base Electro-Optical Transfer Function (EOTF) element and a supplementary EOTF element for a dynamic range mapping of an original luminance value of the XML subtitles to a transferred luminance value;
encoding signaling information including information for identifying the first aspect ratio, wherein an aspect ratio of the XML subtitle data, that is displayed on a screen having a second aspect ratio, is based on the first aspect ratio and the second aspect ratio; and
generating the broadcast signal containing the video data, the XML subtitle data, and the signaling information; and
transmitting the broadcast signal.
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Abstract
The present invention relates to a method and/or a device for transmitting and receiving a broadcast signal for a broadcast service on the basis of an XML subtitle. The method for transmitting a broadcast signal, according to one embodiment of the present invention, comprises the steps of: encoding video data, subtitle data, and signaling information including metadata related to the subtitle data; generating a broadcast signal including the encoded video data, subtitle data, and signaling information; and transmitting the generated broadcast signal.
29 Citations
16 Claims
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1. A method of processing a broadcast signal in a broadcast transmitter, the method comprising:
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encoding video data that correspond to at least one of SD resolution, HD resolution, and UHD resolution; encoding Extensible Mark-up Language (XML) subtitle data having a first aspect ratio, wherein the XML subtitle data includes subtitle text and subtitle metadata, wherein the subtitle metadata includes high dynamic range (HDR) information of the XML subtitles, and wherein the HDR information includes a base Electro-Optical Transfer Function (EOTF) element and a supplementary EOTF element for a dynamic range mapping of an original luminance value of the XML subtitles to a transferred luminance value; encoding signaling information including information for identifying the first aspect ratio, wherein an aspect ratio of the XML subtitle data, that is displayed on a screen having a second aspect ratio, is based on the first aspect ratio and the second aspect ratio; and generating the broadcast signal containing the video data, the XML subtitle data, and the signaling information; and transmitting the broadcast signal. - View Dependent Claims (2, 3, 4)
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5. A method of processing a broadcast signal in a broadcast receiver, the method comprising:
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receiving the broadcast signal containing video data, Extensible Mark-up Language (XML) subtitle data having a first aspect ratio, and signaling information including information for identifying the first aspect ratio, wherein the XML subtitle data includes subtitle text and subtitle metadata, wherein the subtitle metadata includes high dynamic range (HDR) information of the XML subtitles, and wherein the HDR information includes a base Electro-Optical Transfer Function (EOTF) element and a supplementary EOTF element for a dynamic range mapping of an original luminance value of the XML subtitles to a transferred luminance value; demultiplexing the video data, the XML subtitle data and the signaling information from the broadcast signal; decoding the video data, the XML subtitle data and the signaling information; and displaying the video data and the XML subtitle data on a screen having a second aspect ratio, wherein an aspect ratio of the XML subtitle data, that is displayed on the screen, is based on the first aspect ratio and the second aspect ratio. - View Dependent Claims (6, 7, 8)
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9. A broadcast transmitter for processing a broadcast signal, the broadcast transmitter comprising:
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an encoder to encode video data that correspond to at least one of SD resolution, HD resolution, and UHD resolution, Extensible Mark-up Language (XML) subtitle data of XML subtitles having a first aspect ratio, and signaling information including information for identifying the first aspect ratio, wherein an aspect ratio of the XML subtitle data, that is displayed on a screen having a second aspect ratio, is based on the first aspect ratio and the second aspect ratio, wherein the XML subtitle data includes subtitle text and subtitle metadata, wherein the subtitle metadata includes high dynamic range (HDR) information of the XML subtitles, and wherein the HDR information includes a base Electro-Optical Transfer Function (EOTF) element and a supplementary EOTF element for a dynamic range mapping of an original luminance value of the XML subtitles to a transferred luminance value; a broadcast signal generator to generate the broadcast signal containing the video data, the XML subtitle data, and the signaling information; and a transmitter to transmit the broadcast signal. - View Dependent Claims (11, 12, 13)
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10. A broadcast receiver for processing a broadcast signal, the broadcast receiver comprising:
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a receiver to receive the broadcast signal containing video data that correspond to at least one of SD resolution, HD resolution, and UHD resolution, Extensible Mark-up Language (XML) subtitle data having a first aspect ratio, and signaling information including information for identifying the first aspect ratio, wherein the XML subtitle data includes subtitle text and subtitle metadata, wherein the subtitle metadata includes high dynamic range (HDR) information of the XML subtitles, and wherein the HDR information includes a base Electro-Optical Transfer Function (EOTF) element and a supplementary EOTF element for a dynamic range mapping of an original luminance value of the XML subtitles to a transferred luminance value; a demultiplexer to demultiplex the broadcast signal into the video data, the XML subtitle data, and the signaling information; a decoder to decode the video data, the XML subtitle data, and the signaling information; and a screen to have a second aspect ratio and display the video data and the XML subtitle data, wherein an aspect ratio of the XML subtitle data, that is displayed on the screen, is based on the first aspect ratio and the second aspect ratio. - View Dependent Claims (14, 15, 16)
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Specification