CN101375601A - Method of transmitting and receiving digital broadcasting signal and reception system - Google Patents

Method of transmitting and receiving digital broadcasting signal and reception system Download PDF

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Publication number
CN101375601A
CN101375601A CNA2007800035865A CN200780003586A CN101375601A CN 101375601 A CN101375601 A CN 101375601A CN A2007800035865 A CNA2007800035865 A CN A2007800035865A CN 200780003586 A CN200780003586 A CN 200780003586A CN 101375601 A CN101375601 A CN 101375601A
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China
Prior art keywords
composition
audio
coding method
alternative
professional
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Chinese (zh)
Inventor
李哲秀
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LG Electronics Inc
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LG Electronics Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/86—Arrangements characterised by the broadcast information itself
    • H04H20/88—Stereophonic broadcast systems
    • H04H20/89—Stereophonic broadcast systems using three or more audio channels, e.g. triphonic or quadraphonic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/20—Aspects of broadcast communication characterised by the type of broadcast system digital audio broadcasting [DAB]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

Disclosed are a method of providing more digital broadcasting services in a restricted frequency band and a reception system thereof. The reception system includes a tuner which receives a service component and identification information for identifying an alternative coding method of the service component; an extraction unit which parses the received identification information and extracts the alternative coding method of the service component; a controller which controls a decoder corresponding to the extracted alternative coding method to decode the received service component; and the decoder which decodes the received service component under the control of the controller.

Description

Transmit and receive the method and the receiving system of digital broadcast signal
Technical field
The present invention relates to a kind of digital broadcasting, and more specifically, relate to a kind of method and receiving system that transmits and receives digital broadcast signal.
Background technology
Recently, to using digital method but not analogy method launch, receive and show that active day by day and some devices of the research of device of audio broadcast signal, video broadcast signal and data broadcasting signal are by commercialization.
For example, use the broadcasting scheme of digital method transmitting audio frequency broadcast singal, video broadcast signal and data broadcasting signal to be called as digital broadcasting.
Digital broadcasting can for example be digital audio broadcasting or DMB.
Digital broadcasting can provide various MMS (Multimedia Message Service) inexpensively, and can be used to mobile broadcast by allocated frequency band.Digital broadcasting can be created new income source by additional data transport service, and excites receiver market to obtain huge industrial effect.
Routinely, in digital audio broadcasting, for example, can be transmitted in seven audio service that transmit in the frequency band of about 1.5MHz.At this moment, use mask type adaptive universal subband integrated coding and multiplexing (MUSICAM) audio coding method to compress seven audio service.
In other DMBs, for example, a DMB (DMB) service and three audio service of transmitting in the frequency band of about 1.5MHz are launched.
At this moment, use the MUSICAM audio coding method to compress this three audio service.
Yet the conventional method of emission digital broadcast signal has following problem.
The first, because the compression ratio that conventional coding method is used is lower than the compression ratio of the audio compression techniques of recent research and development and utilization, so the quantity of the audio service that can transmit in special frequency band is less relatively.
Routinely, when the broadcasting stream of multiple coding method compression is used in emission, the broadcasting stream that existing broadcasting receiver can not be decoded and be launched.This is because the broadcasting stream that existing broadcasting receiver only can be decoded and be used single audio coding method compression.
The second, conventional digital broadcasting transmitter can not be exported the audio signal of using multiple audio coding method compression.
Summary of the invention
Technical problem
Therefore, the present invention relates to a kind of method and a kind of receiving system that transmits and receives digital broadcast signal, they have eliminated one or more problem that produces owing to the restriction of correlation technique and shortcoming substantially.
The designed one object of the present invention that is used for solving described problem is a kind ofly to transmit more method and a kind of receiving system of multicast signal at special frequency band.
Designed another object of the present invention that is used to solve described problem is that a kind of reception, decoding and output uses the service method and the receiving system thereof of at least a alternative coding method compression.
Technical scheme
By providing a kind of transmission method can realize purpose of the present invention, this method comprises: use at least a alternative coding method to compress professional composition; And the identification information that the professional composition that will use described at least a alternative coding method compression is sent to data channel and will be used to identify described alternative coding method is sent to control channel.
Described professional composition can comprise at least one in audio service composition, video traffic composition and the data service composition.
In the present invention on the other hand, provide a kind of transmission method here, having comprised: used the professional composition of at least a alternative audio coding method compressed audio; And will use the professional composition of described at least a alternative coding method compression to be sent to data channel, and the identification information that will be used to identify described alternative audio coding method is sent to control channel.
In another aspect of this invention, provide a kind of method of reseptance here, having comprised: received the identification information that professional composition and being used to identifies the alternative coding method of described professional composition; Resolve identification information that is received and the alternative coding method of extracting described professional composition; And use the professional composition of decoding and being received corresponding to the coding/decoding method of the alternative coding method of being extracted.
In the present invention on the other hand, provide a kind of receiving system here, comprised tuner, extraction unit, controller and decoder.Described tuner receives professional composition and is used to identify the identification information of the alternative coding method of described professional composition.Described extraction unit is resolved identification information that is received and the alternative coding method of extracting described professional composition.The professional composition that described controller control is decoded and received corresponding to the decoder of the alternative coding method of being extracted.The professional composition that described decoder is decoded and received under the control of described controller.
Beneficial effect
Method, data structure and broadcasting receiver according to emission digital broadcast signal of the present invention have following effect.
Because in special frequency band, transmit more the multitone affair that is taken in small doses at short intervals, so can improve data transmission efficiency.
Because use the audio service of at least a method coding can be decoded and use the audio service of conventional MUSICAM method coding can be decoded, so can realize compatibility with conventional MUSICAM method.
Description of drawings
Be included to provide accompanying drawing embodiments of the invention to be shown and to be used from explanation principle of the present invention with specification one to further understanding of the present invention.
In the drawings:
Fig. 1 is the view that schematically illustrates according to the structure of the fast information channel in dab receiver (FIC) of the digital broadcast signal of the embodiment of the invention and main service channel (MSC);
Fig. 2 is the view that illustrates according to the structure of the FIB (FIB) of the digital broadcast signal of the embodiment of the invention;
Fig. 3 is the view that illustrates according to the structure of the fast information group (FIG) of the digital broadcast signal of the embodiment of the invention;
Fig. 4 be illustrate when the FIG type be 0 and extended field when being 2, according to the view of the service organization (organization) of the embodiment of the invention;
Fig. 5 illustrates the view according to audio service component type (ASCTy) field value of the embodiment of the invention;
Fig. 6 illustrates the view of ASCTy field value according to another embodiment of the present invention;
Fig. 7 illustrates the view of ASCTy field value according to another embodiment of the present invention;
Fig. 8 is the view that the process of the professional composition that uses the ASCTy field value being decoded according to the embodiment of the invention is shown;
Fig. 9 is the flow chart of signal according to the method for the emission digital broadcast signal of the embodiment of the invention;
Figure 10 is the flow chart of signal according to the method for the receiving digital broadcast signal of the embodiment of the invention; And
Figure 11 is the block diagram that illustrates according to the configuration of the broadcasting receiver of the embodiment of the invention.
Embodiment
Now will be in detail with reference to the preferred embodiment of the present invention, its example is illustrated in the accompanying drawings.Configuration of the present invention shown in the accompanying drawing and operation are described as at least one embodiment, and the present invention should not be construed as limited to the embodiment that proposes here.
In addition, though employed term is selected from term known and that be used among the present invention, but some terms of mentioning in the specification of the present invention be by the applicant according to his or his judgement select, the detailed meanings of these terms has been described in the relevant portion of specification here.And, require not only simply by used actual terms but understand the present invention by the implication of each term.
In order clearly to describe the present invention, in the present invention, will in first embodiment, be described in and transmit more multitone frequency service method in the main service channel (MSC), and will describe the notion of fast information channel in dab receiver (FIC) in a second embodiment.To in the 3rd embodiment, describe audio service component type (ASCTy) field of adding, and will in the 4th embodiment, describe the process of when having added the ASCTy field, professional composition having been decoded according to the present invention.To in the 5th embodiment, describe, and will in the 6th embodiment, describe according to the broadcasting receiver that is used to receive the decode digital broadcast signal of the present invention according to the method that transmits and receives digital broadcast signal of the present invention.
In the following embodiments, will describe: when using alternative coding method to compress audio signal, method, data structure and the broadcasting receiver of emission digital broadcast signal.
Even when vision signal or data-signal are launched as broadcast singal, also can use alternative coding method to come compressed video signal or data-signal.Therefore, in the following embodiments, use the method for alternative coding method compression and emission video signal or data-signal to be included in the scope of the present invention.
That is,, in audio signal, vision signal and data-signal, use alternative coding method compression and audio signals, and receiver side receives the decode the audio signal of being launched according to the embodiment of the invention.Alternately, can use alternative coding method compression and emission video signal or data-signal, and receiver side can receive the decode vision signal or the data-signal of being launched.
First embodiment
Fig. 1 schematically illustrates according to the FIC of the digital broadcast signal of the embodiment of the invention and the view of MSC.
Hereinafter, will schematically be described in reference to figure 1 and transmit more multitone service method frequently among the MSC.Can understand according to implementation method of the present invention by second to the 6th embodiment.
As shown in Figure 1, in the present invention, can in MSC, transmit the audio service of using mask type adaptive universal subband integrated coding and the compression of multiplexing (MUSICAM) audio coding method and some audio service of using alternative audio coding method compression.
For ease of describing, in the present invention, use the audio service of MUSICAM audio coding method compression to be known as MUSICAM audio frequency (MA), and use the audio service of alternative audio coding method compression to be known as alternative audio frequency (AA).
The MSC indication is used for the channel of professional composition of transmitting audio frequency and data service composition.MSC is the data channel that is divided into a plurality of subchannels of having encoded.One of each sub-channel transmission or more business composition.Here, the tissue of subchannel and professional composition is known as multiplexing configuration.
Alternative audio coding method can be Advanced Audio Coding (AAC) method or bit slice section arithmetic coding (BSAC) method.Only use the situation of the audio service of MUSICAM audio coding method compression to compare with emission, in the situation of using AAC method or BSAC method, can provide more the multitone affair that is taken in small doses at short intervals.
In the present invention, alternative audio coding method also can be spectral band replication (SBR) method or around the movement motion picture expert group version (MPEG) method.
For example, routinely, can in the frequency band of 1.5MHz, launch a DMB service and three audio service of using the compression of MISICAM audio coding method.Yet, in the present invention, three or four audio service can in the frequency band of 1.5MHz, launching a DMB service using the compression of MUSICAM audio coding method, an audio service and use alternative audio coding method to compress.
As a result, because can further launch one or two audio service in the present invention, so the audio service efficiency of transmission can be improved in the broadcasting station, and the user can have the chance of selecting multitone more to be taken in small doses at short intervals and to be engaged in.
As mentioned above, new information must be added to FIC, makes broadcasting receiver decoding and output use the audio service of alternative audio coding method compression.
The reformed FIC by adding new information will be described in detail in third and fourth embodiment.
The FIC indication allows broadcasting receiver promptly to obtain the channel of the various information relevant with digital audio broadcasting.For example, FIC is used to launch MCI (MCI) and information on services (SI).
For the ease of understanding third and fourth embodiment, the basic conception of FIC will be described in a second embodiment.
Second embodiment
Fig. 2 is the view of the structure of FIB (FIB) that digital broadcasting is shown.
Fig. 3 is the view that the structure of the fast information group (FIG) among the FIB is shown.
Fig. 4 be illustrate when the FIG type be 0 and the view of extended field service organization when being 2.
Hereinafter, the notion of FIC, FIB and FIG will briefly be described with reference to figs. 2 to 4 (together with Fig. 1).
FIC comprises FIB.
As shown in Figure 2, FIB has 256 positions and comprises FIB data field and Cyclic Redundancy Check.
The FIB data field comprises one or more FIG, end mark and filling.
Each FIG comprises FIG header and FIG data field, and described FIG header comprises FIG type and length.
When the FIG type was 0, FIG used the information that can indicate about MCI and SI.
When the FIG type was 0, current/next (C/N) field that the FIG data field comprises, other assemblies (other ensemble) are field, program/data (P/D) field, extended field etc. (OE).
When the FIG type is 0, can limit extended field by 32 kinds of different uses.
For example, when the FIG type be 0 and extended field have when being 2 value, limit the basic service tissue.
That is, in FIC, transmit the MCI of notice about assembly structure, service structure and the information of professional composition with FIG type 0.
Fig. 4 illustrate expand to 2 and the FIG type be the structure of 0 o'clock MCI information.
Fig. 4 illustrates the information about N service, and each service includes service identifier (SId) field, local attribute field, conditional access identifier (CAId) field, professional composition number field and k professional composition description field.
Here, depend on that current service is a still data, services (for example, TV or data) of program service (for example, broadcast receiver), the figure place of SId field changes.
For example, (that is, have in the situation of value 0 in the P/D field) in the situation of program service, the SId field has 16 and comprise 4 country identifier fields and 12 service reference fields.(that is, have in the situation of value 1 in the P/D field) in the situation of data, services, the SId field has 32 and comprise 8 expansion country code (ECC) fields, 4 country identifier fields and 20 service reference fields.
The service that local attribute field indication is launched is only to be used for the specific region that specific assembly is served, and still can be used in all zones.
The CAId field be used to discern be used for launch the service access control system (ACS).
Professional composition number field is used to discern the number of the professional composition relevant with launch service.
Each professional composition description field all has 16 and comprise the TMId field in its high two, and this TMId field is used to indicate the broadcast service type according to transmission mode.The field and the value thereof that are assigned to low 14 can change according to the value of TMId field.
For example, when the TMId field has value " 00 ", TMId field instruct MS C stream audio pattern, and, when the TMId field has value " 01 ", TMId field instruct MS C flow data pattern.When the TMId field has value " 10 ", TMId field indication FIC data channel (FIDC) pattern, and, when the TMId field has value " 11 ", TMId field indication group mode.
When the TMId field had value " 00 ", audio service component type (ASCTy) field, subchannel identifier (SubchId) field, main/auxiliary (P/S) field and conditional access (CA) attribute field were assigned to low 14.
Have the situation of value " 00 " though described the TMId field in the present invention, the present invention also can be applicable to the situation that the TMId field has other values.
That is to say, even when using professional composition of another kind of alternative coding method coding or compression and emission video or data service composition, according to the broadcasting receiver of the present invention described assembly of also can decoding.
The type of the professional composition of ASCTy field indicative audio.
The SubChId field is used to identify the subchannel that is used for the transmitting business composition.
The professional composition that the indication of P/S field is launched is primary clustering or accessory part.
Whether CA attribute field indication access control is applied to the professional composition of being launched.
The 3rd embodiment
According to one embodiment of present invention, in the ASCTy field, limit the alternative coded message of the audio service composition of current emission.FIC and the professional composition of actual audio that the ASCTy field is sent to transmission frame are sent to MSC.
That is, can utilize the value of distributing to the ASCTy field to confirm alternative audio coding method by the audio service composition of MSC emission.
The indication of ASCTy field is used to identify the value of the audio service composition that uses MUSICAM audio coding method or another coding method coding.
Therefore, broadcasting receiver can be by resolving the audio service composition that the ASCTy field is decoded and used various coding method compressions and launch.
Fig. 5 is the view that illustrates according to the value of the ASCTy field of the embodiment of the invention.
Fig. 6 illustrates the view of the value of ASCTy according to another embodiment of the present invention.
Fig. 7 illustrates the view of the value of ASCTy according to another embodiment of the present invention.
According to one embodiment of present invention, for example, by to ASCTy field distribution such as 3,4 or 5 value, but not 0,1 or 2, but the professional composition of indicative audio is to use alternative audio coding method but not the MUSICAM method is compressed.
The value of ASCTy field only is exemplary and can be configured to have other values.
Fig. 5 to 7 illustrates various alternative audio coding methods and distributes to the ASCTy field of described alternative audio coding method.
Below, will describe according to coding and the transmitting audio frequency service method of being used for of the present invention with reference to figure 5 to 7.According to the following embodiment of the invention, transmission method can change according to alternative audio coding method.
As first method, there is a kind of method that a sub-channel transmission is used the professional composition of multiple alternate audio coding method compression of passing through.The plurality of replaceable audio coding method for example can comprise AAC method, SBR method and around the MPEG method.Alternately, can use other audio coding methods.
As shown in Figure 5, for example, when the ASCTy field had value 3 (000011), indication was used AAC method, SBR method by a sub-channel transmission and around the professional composition foreground sounds of MPEG method compression.AAC method and SBR method are called efficient Advanced Audio Coding (HE-AAC) method together.
As shown in Figure 5, when the ASCTy field had value 4 (000100), indication was used AAC method, SBR method by a sub-channel transmission and around the professional composition background sound of MPEG method compression.
As shown in Figure 5, when the ASCTy field had value 5 (000101), indication was used AAC method, SBR method by a sub-channel transmission and around the professional composition multi-channel audio expansion of MPEG method compression.
Here, professional composition multi-channel audio expansion can indicate other information to have the audio frequency effect of upgrading.For example, professional composition multi-channel audio expansion can comprise about implementing the information of other service (for example 5.1 channel audio services).
As alternative plan, there is a kind of method that a sub-channel transmission is used the professional composition of single alternative audio coding method compression of passing through.Alternative audio coding method can be AAC method, SBR method or around the MPEG method.Alternately, can use other audio coding methods.This scheme indication: when supposition uses AAC method and SBR method to compress the audio service composition respectively, can use the audio service composition and the audio service composition that uses the compression of SBR method of AAC method compression by corresponding sub-channel transmission.
As shown in Figure 6, for example, when the ASCTy field had value 3 (000011), the professional composition foreground sounds of AAC method compression was used in indication by a sub-channel transmission.
As shown in Figure 6, when the ASCTy field had value 4 (000100), the professional composition background sound of SBR method compression was used in indication by a sub-channel transmission.
As shown in Figure 6, when the ASCTy field had value 5 (000101), indication was used professional composition multi-channel audio expansion around the compression of MPEG method by a sub-channel transmission.
As third party's case, exist and a kind ofly pass through sub-channel transmission and use the part of professional composition of plurality of replaceable audio coding method compression and the method by another sub-channel transmission another part.For example, can use the professional composition of AAC method and the compression of SBR method by a sub-channel transmission, and can be by the professional composition of another sub-channel transmission use around the compression of MPEG method.This scheme indication: when supposition is used AAC method, SBR method respectively and compressed the audio service composition around the MPEG method, can use the audio service composition of AAC method and the compression of SBR method by a sub-channel transmission, and can be by the audio service composition of another sub-channel transmission use around the compression of MPEG method.
As shown in Figure 7, for example, when the ASCTy field had value 3 (000011), the professional composition foreground sounds of AAC method and the compression of SBR method was used in indication by a sub-channel transmission.AAC method and SBR method are known as efficient Advanced Audio Coding (HE-AAC) method together.
As shown in Figure 7, when the ASCTy field had value 4 (000100), the professional composition background sound of AAC method and the compression of SBR method was used in indication by a sub-channel transmission.
As shown in Figure 7, when the ASCTy field had value 5 (000101), indication was used professional composition multi-channel audio expansion around the compression of MPEG method by a sub-channel transmission.
Shown in Fig. 5 to 7, when the ASCTy field had value 63 (111111), indication transmitted at least one professional composition in mpeg 2 transport stream.Here, value 63 (111111) only is exemplary and can uses another value.
At least one professional composition can comprise at least one in audio service composition, the professional composition of A/V and the data service composition.
That is, the invention is characterized in that professional composition of A/V and data service composition also can be defined and be launched by digital broadcast signal in the ASCTy field.
In the 4th embodiment, will the process that the professional composition that use the said method compression is decoded be described.
The 4th embodiment
Fig. 8 is the view that the process of when defining ASCTy field and alternative audio coding method as shown in Figure 6 professional composition being decoded is shown.
As the embodiment of the invention, will such situation-wherein value coded audio service in an assembly of the basis ASCTy field that is limited as shown in Figure 6 be described.Under situation about not describing in addition, it will be appreciated by those skilled in the art that the situation of the ASCTy field that limited of use shown in Fig. 5 or 7.
Following value and title only are exemplary.
In receiving system according to the present invention, when the FIG type 0 of the expansion 2 of the MCI among the FIC that resolves transmission frame, can confirm service identifier and service coding method.
That is, as shown in Figure 8, when the SId field had value x1234, the service of supposing was the KBS1 broadcast service.
KBS1 serves and can comprise the professional composition that uses the compression of AAC method, the professional composition that uses the compression of SBR method and the use professional composition around the compression of MPEG method.
In Fig. 8, the indication of SubChId field is launched the professional composition that uses the compression of AAC method, the professional composition that uses the compression of SBR method and the use professional composition around the compression of MPEG method by which subchannel (path).The type of ASCTy field indicating services composition.That is, when resolving the ASCTy field, can confirm the coding method of professional composition.P/S field indicating services composition is primary clustering or accessory part.
For example, in KBS1 shown in Figure 8 service, to use the professional composition of AAC method compression to comprise to have value be 13 SubChId field, have value is 3 ASCTy field and to have value be 1 P/S field.
Here, the professional composition that uses the compression of AAC method only can be decoded and export to the broadcasting receiver that only comprises the AAC decoder.The professional composition that uses at least one compression in AAC method and the SBR method can be decoded and export to the broadcasting receiver that only comprises the AAC-SBR decoder.The broadcasting receiver that comprises AAC-SBR (AAC-SBR-with-MPEG) decoder that has around MPEG can decode and export and use AAC method, SBR method and around the professional composition of at least one compression in the MPEG method.
As shown in Figure 8, when the SId field had value x1235, the service of supposing was the KBS2 broadcast service.
The KBS2 service can comprise professional composition that uses the compression of AAC method and the professional composition that uses the compression of SBR method.
Here, the situation that has value x1234 with the SId field is different, when the SId field has value x1235, does not comprise the professional composition of use around the compression of MPEG method.For example, in KBS2 service shown in Figure 8, use the professional composition of AAC method compression to comprise the SubChId field with value 22, ASCTy field and P/S field with value 1 with value 3.
Here, the professional composition that uses the compression of AAC method only can be decoded and export to the broadcasting receiver that only comprises the AAC decoder.The professional composition that uses at least one compression in AAC method and the SBR method can be decoded and export to the broadcasting receiver that only comprises the AAC-SBR decoder.
As shown in Figure 8, when the SId field had value x5678, the service of supposing was the SBS1 broadcast service.
The SBS1 service can comprise professional composition that uses the compression of AAC method and the professional composition that uses around the compression of MPEG method.
Here, when the SId field has value x5678, do not comprise the professional composition that uses the compression of SBR method.For example, in SBS1 shown in Figure 8 service, to use professional composition around the compression of MPEG method to comprise to have value be 35 SubChId field, have value is 5 ASCTy field and to have value be 0 P/S field.
Here, the professional composition that uses the compression of AAC method only can be decoded and export to the broadcasting receiver that only comprises the AAC decoder.Only comprise to decode and exporting and use the AAC method and around the professional composition of at least one compression in the MPEG method around the broadcasting receiver of AAC-MPEG decoder.
As shown in Figure 8, when the SId field had value x5777, the service of supposing was the SBS2 broadcast service.
The SBS2 service can comprise the professional composition that uses the compression of MUSICAM method.
Different with said circumstances, when the SId field has value x5777, only comprise the professional composition that uses the compression of MUSICAM method.Here, can be by existing MUSICAM decoder decode and outgoing traffic composition.
In the present invention, use alternative audio coding method transmitting business composition and add the ASCTy field, make the broadcasting receiver professional composition of can decoding.Correspondingly, use the professional composition of existing MUSICAM method compression also can be launched and to decode.
That is, in the present invention, can realize compatibility with the conventional method of emission and decoded digital broadcast singal.
The 5th embodiment
Fig. 9 is the flow chart of signal according to the method for the emission digital broadcast signal of the embodiment of the invention.
Figure 10 is the flow chart of signal according to the method for the receiving digital broadcast signal of the embodiment of the invention.
Hereinafter, will the method that transmit and receive digital broadcast signal be described with reference to figure 9 and 10 (together with Fig. 1 to 8).
At first, with the method for describing according to the emission digital broadcast signal of the embodiment of the invention.
As shown in Figure 9, transmit the professional composition that uses alternative coding method compression and transmit the information (S701) that indication is used to compress the alternative coding method of professional composition to MSC such as the transmission equipment side in broadcasting station to FIC.For example, the data that are sent to MSC and FIC can be launched into receiving system (S702) such as broadcasting receiver with bit stream format.
Here, alternative coding method can be alternative audio coding method, alternative video method or alternative data-encoding scheme.
Alternative audio coding method can for example be AAC method or BSAC method.
Alternately, alternative audio coding method can be a SBR method or around the MPEG method.
Use the alternative audio coding information of the professional composition of alternative audio coding method compression to be included among the FIC, and more specifically, in the ASCTy of FIC field, limit.
Use the professional composition of alternative coding method compression can be sent to MSC.
Hereinafter, with the method for describing according to embodiment of the invention receiving digital broadcast signal.
As shown in figure 10, broadcasting receiver receives from the digital broadcast signal (S703) of transmission equipment side emission.
Broadcasting receiver can be the equipment that is used for receiving digital broadcast signal, for example television set, mobile phone or DMB equipment.
The audio service composition of the definite digital broadcast signal that is received of broadcasting receiver is by which alternative audio coding method compression and emission (S704).
For example, can carry out described determine (S704) by the ASCTy field of decoding FIC.
As the result who determines (S704), when using alternative audio coding method compression and having launched the audio service composition that is received, according to the decoder decode of the embodiment of the invention and export described audio service composition (S705).
According to the decoder of the embodiment of the invention can be for example AAC decoder, AAC-SBR decoder or have AAC-SBR decoder around MPEG.
As the result who determines (S704), if use existing MUSICAM method but not alternative audio coding method has compressed the audio service composition that is received, the audio service composition (S706) that is received by MUSICAM decoder decode and output then.
The 6th embodiment
Figure 11 is the block diagram that illustrates according to the configuration of the broadcasting receiver that is used for receiving digital broadcast signal of the embodiment of the invention.
Hereinafter, will with reference to Figure 11 (together with Fig. 1 to 10) describe according to the embodiment of the invention be used to receive and the broadcasting receiver of decoded digital broadcast singal.
Broadcasting receiver 801 according to the embodiment of the invention comprises user interface 802, FIC decoder 803, controller 804, tuner 805, MSC decoder 806, audio decoder 807, loud speaker 808, data decoder 809, Video Decoder 810 and display device 811.
Broadcasting receiver 801 can be television set, mobile phone or the DMB equipment that can receive, decode and export digital broadcast signal.
When the order user's input such as channel control or the volume control, the order that user interface 802 is imported to controller 804 emissions.
Tuner 805 stipulates that under the control of controller 804 assembly and tuning frequency corresponding to this assembly are to receive FIC and MSC information.
FIC decoder 803 receives FIC information and extraction and output MCI, SI and FIDC information to controller 804 from tuner 805.FIC decoder 803 extracts and is used for the configuration information of classify traffic composition and about the information of professional composition attribute to controller 804 outputs.In the present invention, FIC decoder 803 also is known as extraction unit.
MCI and SI information configuration subchannel that MSC decoder 806 receives MSC information and uses slave controller 804 to launch from tuner 805.When having disposed subchannel, decoded and be output to decoder by the data of sub-channel transmission with bit stream format, that is, and any one in audio decoder 807 and the data decoder 809.
The audio bit stream that audio decoder 807 uses decompression algorithm decoding and output to export from MSC decoder 806.
Audio decoder 807 can comprise AAC decoder, AAC-SBR decoder, around the AAC-MPEG decoder with have around in the AAC-SBR decoder of MPEG at least one.Alternately, can add the decoder of the audio service composition that uses other compression methods codings of being used to decode.
The audio service composition that loud speaker 808 amplifies and output is decoded by audio decoder 807.
Data decoder 809 reconfigures by the information on services of FIC decoder 803 decoding and from the necessary data of the bit stream that receives by MSC decoder 806.
When the user of broadcasting receiver 801 selected Video service, Video Decoder 801 returned to previous non-compressed state from data decoder 809 receiver, video bit streams and with video bit stream.
Display device 811 shows by Video Decoder 810 image restored on screen.
The function of controller 804 control user interfaces 802, FIC decoder 803, tuner 805, MSC decoder 806, audio decoder 807, data decoder 809 and Video Decoder 810.
Hereinafter, implement process of the present invention with describing by the parts of broadcasting receiver.
When selecting the order of digital broadcast signal by user interface 802 inputs, controller 804 control tuners 805 tuning selected digital broadcast signals are by its channel transmitted.
Digital broadcast signal can be the audio broadcast signal that comprises the professional composition of the alternative audio coding method compression of use shown in Fig. 5 to 7.
Here, alternative audio coding method can comprise for example AAC method and BSAC method.
Alternately, alternative audio coding method can comprise the SBR method and around the MPEG method.
Under the control of controller 804, comprise that the FIC information about the audio broadcast signal of the information of the professional composition that uses the compression of alternative audio coding method is launched into FIC decoder 803, and the MSC information of professional composition is launched into MSC decoder 806.
FIC decoder 803 read FIC information be used to limit the ASCTy field of audio service component type (for example, limit compression method) and determine be compressed with which kind of form from the audio service composition of tuner 805 emissions.
The audio decoder of reception about determining corresponding to described compressed format from the controller 804 control audio decoders 807 of the information of the compressed format of the audio service composition of tuner 805 emissions by FIC decoder 803.
For example, when the compressed format of the audio service composition of launching from tuner 805 was the AAC method, controller 804 control audio decoders 807 made that the AAC decoder is selected.Selected audio decoder 807 receives audio service composition from 806 outputs of MSC decoder, the audio service composition is returned to previous non-compressed state, and the audio service composition of non-compressed state is outputed to loud speaker 808.
Be apparent that to those skilled in the art, can be under the prerequisite that does not deviate from spirit of the present invention or scope make various modifications and variations in to the present invention.Therefore, the present invention is intended to contain modifications and variations of the present invention, as long as they are arranged in the scope of the claims and the equivalent form of value thereof.

Claims (20)

1. transmission method comprises:
Use at least a alternative coding method to compress professional composition; And
The identification information that the professional composition that uses described at least a alternative coding method compression is sent to data channel and will be used to identify described alternative coding method is sent to control channel.
2. method according to claim 1, wherein said professional composition comprises at least one in audio service composition, video traffic composition and the data service composition.
3. method according to claim 2, the alternative coding method of wherein said audio service composition comprise at least a in Advanced Audio Coding (AAC) method and bit slice section arithmetic coding (BSAC) method.
4. method according to claim 2, the alternative coding method of wherein said audio service composition comprise at least a in spectral band replication (SBR) method and around the movement motion picture expert group version (MPEG) method.
5. method according to claim 1, wherein said data channel are that main service channel (MSC) and described control channel are fast information channel in dab receiver (FIC).
6. method according to claim 5 wherein is defined for the identification information of alternative coding method of the described professional composition of sign in fast information group (FIG) type 0 of the expansion 2 in the MCI (MCI) of described FIC.
7. method according to claim 6 wherein is defined for the identification information of alternative coding method of the described professional composition of sign in the FIG type 0 of the expansion 2 in audio service component type (ASCTy) field in the descriptor field of described professional composition.
8. transmission method comprises:
Use the professional composition of at least a alternative audio coding method compressed audio; And
To use the professional composition of described at least a alternative coding method compression to be sent to data channel, and the identification information that will be used to identify described alternative audio coding method is sent to control channel.
9. method according to claim 8, wherein said alternative audio coding method comprise at least a in Advanced Audio Coding (AAC) method and bit slice section arithmetic coding (BSAC) method.
10. method according to claim 8, wherein said alternative audio coding method comprise at least a in spectral band replication (SBR) method and around the movement motion picture expert group version (MPEG) method.
11. method according to claim 8, wherein said data channel are main service channel (MSC) and described control channel is fast information channel in dab receiver (FIC).
12. method according to claim 11 wherein is defined for the identification information of Ti audio coding method of the described audio service composition of sign in fast information group (FIG) type 0 of the expansion 2 in the MCI (MCI) of described FIC.
13. method according to claim 12 wherein is defined for the identification information of alternative coding method of the described professional composition of sign in the FIG type 0 of the expansion 2 in audio service component type (ASCTy) field in the descriptor field of described professional composition.
14. a method of reseptance comprises:
Receive the identification information that professional composition and being used to identifies the alternative coding method of described professional composition;
Resolve identification information that is received and the alternative coding method of extracting described professional composition; And
The professional composition that use is decoded and received corresponding to the coding/decoding method of the alternative coding method of being extracted.
15. method according to claim 14, wherein said professional composition comprises at least one in audio service composition, video traffic composition and the data service composition.
16. method according to claim 15 is wherein extracted the identification information of the alternative coding method that is used to identify described audio service composition by resolving audio service component type (ASCTy) field in the fast information channel in dab receiver (FIC).
17. a receiving system comprises:
Tuner is used to the identification information that receives professional composition and be used to identify the alternative coding method of described professional composition;
Extraction unit is used to the alternative coding method of resolving the identification information that is received and extracting described professional composition;
Controller is used to control the professional composition of decoding and being received corresponding to the decoder of the alternative coding method of being extracted; With
Decoder is used for the professional composition of decoding and being received under the control of described controller.
18. receiving system according to claim 17, wherein said professional composition comprises at least one in audio service composition, video traffic composition and the data service composition.
19. receiving system according to claim 18 is wherein extracted the identification information of the alternative coding method that is used to identify described audio service composition by resolving audio service component type (ASCTy) field in the fast information channel in dab receiver.
20. receiving system according to claim 17, wherein said decoder comprise AAC decoder, AAC-SBR decoder, around the AAC-MPEG decoder with have around in the AAC-SBR decoder of MPEG at least one.
CNA2007800035865A 2006-01-25 2007-01-25 Method of transmitting and receiving digital broadcasting signal and reception system Pending CN101375601A (en)

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US20040022326A1 (en) * 2002-07-30 2004-02-05 John Morrish Digital audio receiver
US20040092228A1 (en) * 2002-11-07 2004-05-13 Force Charles T. Apparatus and method for enabling use of low power satellites, such as C-band, to broadcast to mobile and non-directional receivers, and signal design therefor
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Application publication date: 20090225