Broadcasting receiver and broadcast signal processing method
First Claim
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1. An apparatus for receiving a broadcast signal, the apparatus comprising:
- a receiver configured to receive the broadcast signal including a transmission frame comprising data groups,wherein each data group includes mobile service data, known data sequences, and signaling data comprising transmission parameters for signaling the mobile service data,wherein the data groups are transmitted during slots,wherein each of the slots is a time period for multiplexing the mobile service data and a main service data,wherein sixteen slots are included in a sub frame and five sub frames are included in the transmission frame, andwherein a first portion of the transmission parameters includes signaling data for a current transmission frame and a second portion of the transmission parameters includes signaling data for a next transmission frame;
a known data detector configured to detect at least one of the known data sequences in the received broadcast signal;
an equalizer configured to channel-equalize the received mobile service data using at least one of the known data sequences; and
a decoder configured to extract audio data and scale factor index information from the channel-equalized mobile service data and inversely scale the extracted audio data on the basis of a scale factor indicated by the scale factor index information to restore an audio signal.
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Abstract
A digital broadcasting system which is robust against an error when mobile service data is transmitted and a method of processing data are disclosed. The mobile service data is subjected to an additional coding process and the coded mobile service data is transmitted. Accordingly, it is possible to cope with a serious channel variation while applying robustness to the mobile service data.
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Citations
10 Claims
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1. An apparatus for receiving a broadcast signal, the apparatus comprising:
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a receiver configured to receive the broadcast signal including a transmission frame comprising data groups, wherein each data group includes mobile service data, known data sequences, and signaling data comprising transmission parameters for signaling the mobile service data, wherein the data groups are transmitted during slots, wherein each of the slots is a time period for multiplexing the mobile service data and a main service data, wherein sixteen slots are included in a sub frame and five sub frames are included in the transmission frame, and wherein a first portion of the transmission parameters includes signaling data for a current transmission frame and a second portion of the transmission parameters includes signaling data for a next transmission frame; a known data detector configured to detect at least one of the known data sequences in the received broadcast signal; an equalizer configured to channel-equalize the received mobile service data using at least one of the known data sequences; and a decoder configured to extract audio data and scale factor index information from the channel-equalized mobile service data and inversely scale the extracted audio data on the basis of a scale factor indicated by the scale factor index information to restore an audio signal. - View Dependent Claims (2, 3)
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4. A method for receiving a broadcast signal, the method comprising:
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receiving the broadcast signal including a transmission frame comprising data groups, wherein each data group includes mobile service data, known data sequences, and signaling data having transmission parameters for signaling the mobile service data, wherein the data groups are transmitted during slots, wherein each of the slots is a time period for multiplexing the mobile service data and a main service data, wherein sixteen slots are included in a sub frame and five sub frames are included in the transmission frame, and wherein a first portion of the transmission parameters includes signaling data for a current transmission frame and a second portion of the transmission parameters includes signaling data for a next transmission frame; detecting at least one of the known data sequences in the received broadcast signal; channel-equalizing the received mobile service data using at least one of the known data sequences; and extracting audio data and scale factor index information from the channel-equalized mobile service data and inversely scaling the extracted audio data according to a scale factor indicated by the scale factor index information to restore an audio signal. - View Dependent Claims (5, 6)
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7. An apparatus for transmitting a digital broadcast signal including mobile service data, the apparatus comprising:
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a Reed-Solomon (RS) encoder configured to build one or two RS frames, wherein the RS frame is a two-dimensional data frame through which the mobile service data is RS and Cyclic-Redundancy-Check (CRC) encoded; a divider configured to divide the built one or two RS frames into a plurality of RS frame portions, such that each of the RS frame portions has a size of PL bytes, wherein the PL is an integer; a signaling encoder configured to encode signaling data including transmission parameters for signaling the mobile service data; a group formatter configured to form data groups, such that data group includes data of each of the plurality of RS frame portions and the encoded signaling data; a packet formatter configured to form mobile service data packets including data in the formed data groups; a multiplexer configured to multiplex the mobile service data packets with main service data packets including main service data; and a transmission unit configured to transmit the digital broadcast signal including the multiplexed mobile service data packets and main service data packets; wherein the data groups are transmitted during slots, wherein each of the slots is a time period for multiplexing the mobile service data and the main service data, wherein sixteen slots are included in a sub frame and five sub frames are included in a transmission frame, wherein a first portion of the transmission parameters includes signaling data for a current transmission frame and a second portion of the transmission parameters includes signaling data for a next transmission frame, and wherein each data group includes audio data coded according to a scale factor indicated by scale factor index information. - View Dependent Claims (8)
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9. A method for transmitting a digital broadcast signal including mobile service data, the method comprising:
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building one or two Reed-Solomon (RS) frames, wherein the RS frame is a two-dimensional data frame through which the mobile service data is RS and Cyclic-Redundancy-Check (CRC) encoded; dividing the built one or two RS frames into a plurality of RS frame portions, such that each of the RS frame portions has size of PL bytes, wherein the PL is an integer; encoding signaling data including transmission parameters for signaling the mobile service data; forming data groups, such that each data group includes data of each of the plurality of RS frame portions and the encoded signaling data; forming mobile service data packets including data in the formed data groups; multiplexing the mobile service data packets with main service data packets including main service data; and transmitting the digital broadcast signal including the multiplexed mobile service data packets and main service data packets; wherein the data groups are transmitted during slots, wherein each of the slots is a time period for multiplexing the mobile service data and the main service data, wherein sixteen slots are included in a sub frame and five sub frames are included in a transmission frame, wherein a first portion of the transmission parameters includes signaling data for a current transmission frame and a second portion of the transmission parameters includes signaling data for a next transmission frame, and wherein each data group includes audio data coded on the basis of a scale factor indicated by scale factor index information. - View Dependent Claims (10)
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Specification