Broadcast signal transmitting apparatus, broadcast signal receiving apparatus, method for transmitting broadcast signal, and method for receiving broadcast signal
The present invention provides a method for transmitting a broadcast signal. A broadcast receiver, according to one embodiment of the present invention, comprises: a broadcast signal interface, which receives a broadcast signal comprising broadcast content, which includes one or more components, and a component element which describes the one more components; a control unit for parsing the component element and decoding the broadcast content by referencing the parsed component element, wherein the component element comprises a capability element describing capabilities of a broadcast receiver required for processing the component; and a display unit for displaying the broadcast content which has been decoded.
1. A broadcast receiver comprising:
a tuner configured to receive a broadcast signal;
a time deinterleaver configured to time deinterleave a Time Interleaving (TI) block in the broadcast signal, the TI block including one or more Forward Error Correction (FEC) blocks interleaved by a TI scheme, the TI scheme including linear-writing the one or more FEC blocks in a memory and diagonal-reading the one or more FEC block based on the TI block by skipping one or more virtual FEC blocks that are ahead of the one or more FEC blocks in the TI block;
a decoder configured to decode the broadcast signal, the decoded broadcast signal including a signal frame including:
one or more components included in a content of a service and content information describing the content, the content information including component information including role information for at least one of an audio component, a video component or a closed caption component of the one or more components,
the role information for the audio component including visually impaired, and
first information for rapid channel scans and service acquisition and second information describing mappings between Data Pipes (DPs) and the service and information identifying a DP for the second information; and
a display configured to display information related to the content based on the role information of the one or more components of the content in the decoded broadcast signal.
2. The broadcast receiver according to claim 1 , wherein the role information for the audio component is one of completed main, music, dialog, effects, hearing impaired, or commentary.
3. The broadcast receiver according to claim 1 , wherein the display receives a user input signal including reservation information for a content.
4. The broadcast receiver according to claim 1 , wherein in response to the role information for the visually impaired, the display provides additional audio data.
5. A method for receiving a broadcast signal, the method comprising:
receiving a broadcast signal;
time deinterleaving a Time Interleaving (TI) block in the broadcast signal, the TI block including one or more Forward Error Correction (FEC) blocks interleaved by a TI scheme, the TI scheme including column-writing the one or more FEC blocks in a memory and diagonal-reading the one or more FEC block based on the TI block by skipping one or more virtual FEC blocks that are ahead of the one or more FEC blocks in the TI block;
decoding the broadcast signal, the decoded broadcast signal including a signal frame including:
one or more components included in a content of a service and content information describing the content, the content information including component information including role information for at least one of an audio component, a video component or a closed caption component of the one or more components,
the role information for the audio component including visually impaired, and
first information for rapid channel scans and service acquisition and second information describing mappings between Data Pipes (DPs) and the service, and information identifying a DP for the second information; and
displaying information related to the content based on the role information of the one or more components of the content in the decoded broadcast signal.
6. The method according to claim 5 , wherein the role information for the audio component is one of completed main, music, dialog, effects, hearing impaired, or commentary.
7. The method according to claim 6 , further comprising:
receiving a user input signal including reservation information for a content.
8. The method according to claim 5 , further comprising:
providing additional audio data in response to the role information for the visually impaired.
9. A method for transmitting a broadcast signal, the method comprising:
encoding one or more components included in a content of a service and content information describing the content, the content information including component information including role information for at least one of an audio component, a video component or a closed caption component of the one or more components;
time interleaving the one or more components and the component information based on a Time Interleaving (TI) block including one or more Forward Error Correction (FEC) blocks by column-writing the one or more FEC blocks in a memory and diagonal-reading the one or more FEC block based on the TI block by skipping one or more virtual FEC blocks that are ahead of the one or more FEC blocks in the TI block;
modulating a signal frame including the TI block based on an Orthogonal Frequency Division Multiplexing (OFDM) scheme; and
transmitting the broadcast signal including the signal frame,
the role information for the audio component including visually impaired, and
the signal frame including first information for rapid channel scans and service acquisition and second information describing mappings between Data Pipes (DPs) and the service, and information identifying a DP for the second information.
10. The method according to claim 9 , wherein the role information for the audio component is one of completed main, music, dialog, effects, visually impaired, hearing impaired, or commentary.
11. An apparatus for transmitting a broadcast signal, the apparatus comprising:
an encoder configured to encode one or more components included in a content of a service and content information describing the content, the content information including component information including role information for at least one of an audio component, a video component or a closed caption component of the one or more components;
a time interleaver configured to time interleave the one or more components and the component information based on a Time Interleaving (TI) block including one or more Forward Error Correction (FEC) blocks by column-writing the one or more FEC blocks in a memory and diagonal-reading the one or more FEC block based on the TI block by skipping one or more virtual FEC blocks;
a modulator configured to modulate a signal frame including the TI block based on an Orthogonal Frequency Division Multiplexing (OFDM) scheme: and
a transmitter configured to transmit the broadcast signal including the signal frame,
the role information for the audio component including visually impaired, and
the signal frame including first information for rapid channel scans and service acquisition and second information describing mappings between Data Pipes (DPs) and the service, and information identifying a DP for the second information.