Broadcast signal transmitting apparatus, broadcast signal receiving apparatus, broadcast signal transmitting method, and broadcast signal receiving method

Abstract

Disclosed is a method for transmitting a broadcast signal. The method comprises formatting input streams with multiple data transmission channels, and the formatting step comprises adding a header indicating a format of a payload of the BBF.

What is claimed is: 
     
       1. A method for transmitting a broadcast signal, the method comprising:
 formatting input stream into at least one physical layer pipe (PLP); 
 encoding data of the at least one PLP; 
 generating at least one signal frame by mapping the encoded data; 
 modulating the at least one signal frame using an orthogonal frequency division multiplexing (OFDM) scheme; and 
 transmitting the broadcast signal comprising the at least one modulated signal frame, 
 wherein the formatting comprises 
 mapping data packets to a payload of a baseband frame (BBF), and 
 adding a header ahead of the payload, 
 wherein the header comprises first control indication information for indicating whether a specific first part is present in the header, 
 wherein the specific part comprises at least one of a second part or a third part, and 
 wherein the second part consists of a type field indicating a type of the third part and a length field indicating a length of the third part, wherein when the specific part is present in the header, the first control information is used to further indicate length of the second part comprised in the specific part, the length of the second part being either 1 byte or 2 bytes, 
 the first part includes a type field indicating a type of a second part and a length field indicating a length of the second part in response to the indication information indicating that the first part is present in the header, 
 a length of the first part being either 1 byte or 2 bytes,  
 wherein when the second part has length of 2 bytes, thea first byte of the secondfirst part consists of the type field and a LSB (least significant bit) part of the length field and thea second byte of the secondfirst part consists of a MSB (most significant bit) part of the length field in response to the first part having the length of 2 bytes, and 
 whereina length of the type field is 3 bits, a length of the LSB part of the length field is 5 bits, and a length of the MSB part of the length field is 8 bits. 
 
     
     
       2. The method of  claim 1 , wherein if a value of the first control indication information is ‘01’, the first control indication information indicates that the a specific part is present in the header and comprises the second first part having a length of 1 byte. 
     
     
       3. The method of  claim 1 , wherein if a value of the first control indication information is ‘10’, the first control indication information indicates that the a specific part is present in the header and comprises the second first part having a length of 2 bytes. 
     
     
       4. The method of  claim 1 , wherein if a value of the first control indication information is ‘00’, the first control indication information indicates that the a specific part is not present in the header. 
     
     
       5. The method of  claim 1 , wherein the header comprises at least one of second control information or third control information,
 wherein the third control information comprises at least one of a third control information LSB (least significant bit) field or a third control information MSB(most significant bit) field,   wherein the second control information indicates whether the third control information MSB (most significant bit) field is included or not, and   wherein the third control information is information related to the start position of a first data packet in the BBF.   
     
     
       6. The method of  claim 5 , wherein the value of the third control information is offset from the start of the payload to the start of the first data packet in the BBF. 
     
     
       7. The method of  claim 1 , wherein the first control indication information is an Extension Indicator (EXT_I) field, and the a specific part is a stuffing field. 
     
     
       8. The method of  claim 1 , wherein the second first part is a stuffing header, and the third second part is a stuffing byte. 
     
     
       9. The method of  claim 1 , wherein the third second part includes at least one of padding data or data indicating additional signaling information. 
     
     
       10. A transmission apparatus for transmitting a broadcast signal, the transmission apparatus comprising:
 an input formatter for formatting input stream into at least one physical layer pipe (PLP); 
 an encoder for encoding data of the at least one PLP; 
 a frame builder for generating at least one signal frame by mapping the encoded data; 
 a modulator for modulating the at least one signal frame by an orthogonal frequency division multiplexing (OFDM) scheme; and 
 transmitter for transmitting the broadcast signal comprising the at least one modulated signal frame, 
 wherein the input formatter comprises 
 a baseband frame slicer for mapping data packets to a payload of a baseband frame (BBF), and 
 a baseband frame header inserter for adding a header ahead of the payload, 
 wherein the header comprises first control indication information for indicating whether a specific part is present in the header, 
 wherein the specific part comprises at least one of a second part or a third part, and 
 wherein the second part consists of a type field indicating a type of the third part and a length field indicating a length of the third part, wherein when the specific part is present in the header, the first control information is used to further indicate length of the second part comprised in the specific part, the length of the second part being either 1 byte or 2 bytes, 
 when the specific part is present in the header, the specific part comprises a first part having a length, 
 the length of the first part being either 1 byte or 2 bytes, 
 the first part includes a type field indicating a type of a second part and a length field indicating a length of the second part,  
 wherein when the second first part has a length of 2 bytes, the first byte of the second first part consists of the type field and a LSB (least significant bit) part of the length field and the second byte of the second first part consists of a MSB (most significant bit) part of the length field, and 
 whereina length of the type field is 3 bits, a length of the LSB part of the length field is 5 bits, and a length of the MSB part of the length field is 8 bits. 
 
     
     
       11. The method of  claim 9 , wherein:
 when the type field has a first value, the first value of the type field indicates that the third second part includes the padding data, or 
 when the type field has a second value, the second value of the type field indicates that the third second part includes the data indicating the additional signaling information. 
 
     
     
       12. A method for receiving a broadcast signal, the method comprising:
 receiving the broadcast signal;   performing Orthogonal Frequency Division Multiplexing (OFDM) demodulation on the broadcast signal;   output-processing one or more baseband frame of the demodulated broadcast signal to output a data stream,   the baseband frame including a header and a payload,   wherein the header comprises indication information for indicating whether a first part is present in the header,   the first part includes a type field indicating a type of a second part and a length field indicating a length of the second part in response to the indication information indicating that the first part is present in the header,   a length of the first part being either 1 byte or 2 bytes,   a first byte of the first part consists of the type field and a LSB (least significant bit) part of the length field and a second byte of the first part consists of a MSB (most significant bit) part of the length field in response to the first part having the length of 2 bytes, and   a length of the type field is 3 bits, a length of the LSB part of the length field is 5 bits, and a length of the MSB part of the length field is 8 bits.    
     
     
       13. A device, comprising:
 a tuner configured to receive a broadcast signal;   a demodulator configured to demodulate the broadcast signal by an Orthogonal Frequency Division Multiplexing (OFDM) scheme; and   an output processor configured to output process one or more baseband frame of the demodulated broadcast signal to output data stream,   the baseband frame including a header and a payload,   wherein the header comprises indication information for indicating whether a first part is present in the header,   the first part includes a type field indicating a type of a second part and a length field indicating a length of the second part in response to the indication information indicating that the first part is present in the header,   a length of the first part being either 1 byte or 2 bytes,   a first byte of the first part consists of the type field and a LSB (least significant bit) part of the length field and a second byte of the first part consists of a MSB (most significant bit) part of the length field in response to the first part having the length of 2 bytes, and   a length of the type field is 3 bits, a length of the LSB part of the length field is 5 bits, and a length of the MSB part of the length field is 8 bits.    
     
     
       14. A device, comprising:
 a tuner configured to receive a broadcast signal;   a demodulator configured to demodulate the broadcast signal by an Orthogonal Frequency Division Multiplexing (OFDM) scheme;   one or more processor; and   one or more memories configured to store one or more programs, wherein the one or more programs are configured to be executed by the one or more processors, the one or more programs including instructions for:   processing one or more baseband frame of the demodulated broadcast signal to output data stream,   the baseband frame including a header and a payload,   wherein the header comprises indication information for indicating whether a first part is present in the header,   the first part includes a type field indicating a type of a second part and a length field indicating a length of the second part in response to the indication information indicating that the first part is present in the header,   a length of the first part being either 1 byte or 2 bytes,   a first byte of the first part consists of the type field and a LSB (least significant bit) part of the length field and a second byte of the first part consists of a MSB (most significant bit) part of the length field in response to the first part having the length of 2 bytes, and   a length of the type field is 3 bits, a length of the LSB part of the length field is 5 bits, and a length of the MSB part of the length field is 8 bits.    
     
     
       15. The method of claim 1, wherein
 the length field of the first part is 5 bits and the length of the second part is less than or equal to 31 bytes, the second part is preceded by the first part in response to the first part having a length of 1 byte,   the length field of the first part represents end of the baseband frame in response to the first part having a length of 2 bytes.    
     
     
       16. The device of claim 10, wherein
 the length field of the first part is 5 bits and the length of the second part is less than or equal to 31 bytes, the second part is preceded by the first part in response to the first part having a length of 1 byte,   the length field of the first part represents end of the baseband frame in response to the first part having a length of 2 bytes.    
     
     
       17. The method of claim 12, wherein
 the length field of the first part is 5 bits and the length of the second part is less than or equal to 31 bytes, the second part is preceded by the first part in response to the first part having a length of 1 byte,   the length field of the first part represents end of the baseband frame in response to the first part having a length of 2 bytes.    
     
     
       18. The device of claim 13, wherein
 the length field of the first part is 5 bits and the length of the second part is less than or equal to 31 bytes, the second part is preceded by the first part in response to the first part having a length of 1 byte,   the length field of the first part represents end of the baseband frame in response to the first part having a length of 2 bytes.    
     
     
       19. The device of claim 14, wherein
 the length field of the first part is 5 bits and the length of the second part is less than or equal to 31 bytes, the second part is preceded by the first part in response to the first part having a length of 1 byte,   the length field of the first part represents end of the baseband frame in response to the first part having a length of 2 bytes.