CN105721930A - Channel searching method and system based on digital signal - Google Patents
Channel searching method and system based on digital signal Download PDFInfo
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- CN105721930A CN105721930A CN201610080708.1A CN201610080708A CN105721930A CN 105721930 A CN105721930 A CN 105721930A CN 201610080708 A CN201610080708 A CN 201610080708A CN 105721930 A CN105721930 A CN 105721930A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 348
- 238000012856 packing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
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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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
- H04N21/4384—Accessing a communication channel involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a channel searching method and system based on a digital signal. The method comprises the following steps: generating transmission data by a server, and transmitting the transmission data to a television terminal, wherein the transmission data comprise fixed frequency points; receiving the transmission data by the television terminal, and acquiring frequency point information of the transmission data according to the fixed frequency points; and storing corresponding program information by the television terminal according to the frequency point information, and presetting programs according to the program information. According to the channel searching method and system based on the digital signal provided by the invention, the problem in the prior art that the channel searching process is time consuming can be solved, channels can be searched by locking the fixed frequency points, the channel searching speed can be accelerated, the channel searching efficiency can be improved, and the user requirement can be met.
Description
Technical field
The present invention relates to technical field of television sets, particularly relate to a kind of channel search method based on digital signal and system.
Background technology
TV machine is widely used in the life & amusement of people, and when user has just started or uses television set after factory reset, it is necessary to first carry out tuning operation.
In existing TV set to search programmes method, it is necessary to all frequencies are scanned for, then capture PAT (ProgramAssociationTable, Program Association Table), the tables such as PMT (ProgramMapTable, Program Map Table), thus obtaining relevant programme information.Based on this channel search method, when adopting full range point to scan for, it is necessary to consuming for up to 2 minutes, if front end frequency program is too much, then the tuning time can be longer；Even if adopting quick channel search operation, also to expend the time of at least nearly 1 minute, and quick channel search there will be the problems such as incomplete, the leakage platform of tuning, affects Consumer's Experience.
Summary of the invention
Present invention is primarily targeted at a kind of channel search method based on digital signal of proposition and system, it is intended to realize by locking fixing frequency tuning, accelerate tuning speed, improve tuning efficiency, meet user's request.
For achieving the above object, the channel search method based on digital signal provided by the invention, including:
Server generates transmission data, and transfers data to television terminal described in transmission, and described transmission data include fixing frequency；
Described television terminal receives described transmission data, obtains the frequency point information of described transmission data according to described fixing frequency；
Described television terminal is according to described frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to described programme information.
Preferably, described server generates transmission data, and the step transferring data to television terminal described in transmission includes:
Described server obtains program data, is packaged by described program data, generates corresponding transmission stream；
Described transmission stream is modulated by described server；
Described server, according to the described transmission stream after modulation, inserts described fixing frequency in subsequent transmission stream, and described subsequent transmission stream is modified；
Described transmission stream after modulation and revised described subsequent transmission stream are carried out multiplexing by described server, generate described transmission data, and send to described television terminal.
Preferably, the described transmission stream after described modulation includes NIT table, preserves frequency point information, modulation system, symbol rate and download PID in described NIT table；
Subsequent transmission stream, according to the described transmission stream after modulation, is modified, and resumes the step inserting described fixing frequency in defeated stream in the rear and include by described server:
The NIT table of subsequent transmission stream described in described server lookup；
Described frequency point information in NIT table in described transmission stream after modulation, modulation system, symbol rate and download PID are filled to the NIT table of described subsequent transmission stream by described server；
Described server resumes in the rear in the NIT table of defeated stream and inserts described fixing frequency.
Preferably, described television terminal receives described transmission data, includes according to the step of the frequency point information of the described fixing frequency described transmission data of acquisition:
Described television terminal receives described transmission data, locks described fixing frequency；
Described television terminal, according to described fixing frequency, resolves described transmission data, obtains the frequency point information of described transmission data.
Preferably, described television terminal is according to described fixing frequency, and the step resolving described transmission data includes:
Described television terminal, according to described fixing frequency, obtains described subsequent transmission stream；
Described television terminal resolves the NIT table in described subsequent transmission stream, obtains described frequency point information.
The embodiment of the present invention also proposes a kind of channel searching system based on digital signal, including:
Server, is used for generating transmission data, and transfers data to television terminal described in transmission, and described transmission data include fixing frequency；
Television terminal, is used for receiving described transmission data, obtains the frequency point information of described transmission data according to described fixing frequency；According to described frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to described programme information.
Preferably, described server, it is additionally operable to obtain program data, described program data is packaged, generate corresponding transmission stream；Described transmission stream is modulated；According to the described transmission stream after modulation, subsequent transmission stream inserts described fixing frequency, and described subsequent transmission stream is modified；Described transmission stream after modulation and revised described subsequent transmission stream are carried out multiplexing, generates described transmission data, and send to described television terminal.
Preferably, described server, it is additionally operable to inquire about the NIT table of described subsequent transmission stream；Described frequency point information in NIT table in described transmission stream after modulation, modulation system, symbol rate and download PID are filled to the NIT table of described subsequent transmission stream；Resume in the rear and the NIT table of defeated stream inserts described fixing frequency.
Preferably, described television terminal, it is additionally operable to receive described transmission data, locks described fixing frequency；According to described fixing frequency, resolve described transmission data, obtain the frequency point information of described transmission data.
Preferably, described television terminal, it is additionally operable to, according to described fixing frequency, obtain described subsequent transmission stream；Resolve the NIT table in described subsequent transmission stream, obtain described frequency point information.
The invention discloses a kind of channel search method based on digital signal and system, generate transmission data by server, and transmission transfers data to television terminal, transmission data include fixing frequency；Television terminal receives transmission data, obtains the frequency point information of transmission data according to fixing frequency；Television terminal according to frequency point information, the programme information that storage is corresponding, and carry out program according to programme information and preset, solve the long problem consuming time of tuning process in prior art.Achieve by locking fixing frequency tuning, accelerate tuning speed, improve tuning efficiency, meet user's request.
Accompanying drawing explanation
Fig. 1 is the present invention schematic flow sheet based on the channel search method first embodiment of digital signal；
Fig. 2 is the schematic diagram of the program data structure content of each frequency in the embodiment of the present invention；
Fig. 3 is that server described in the embodiment of the present invention generates transmission data, and transfers data to a kind of schematic flow sheet of the step of television terminal described in transmission；
Fig. 4 is that server described in the embodiment of the present invention is according to the described transmission stream after modulation, a kind of schematic flow sheet to the step that subsequent transmission stream is modified；
Fig. 5 is that television terminal described in the embodiment of the present invention receives described transmission data, obtains a kind of schematic flow sheet of the step of the frequency point information of described transmission data according to described fixing frequency；
Fig. 6 be television terminal described in the embodiment of the present invention according to described fixing frequency, resolve a kind of schematic flow sheet of the step of described transmission data；
Fig. 7 is the present invention high-level schematic functional block diagram based on the first embodiment of the channel searching system of digital signal.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
The primary solutions of the embodiment of the present invention is: server generates transmission data, and transmission transfers data to television terminal, and transmission data include fixing frequency；Television terminal receives transmission data, obtains the frequency point information of transmission data according to fixing frequency；Television terminal is according to frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to this programme information.
Thus, the long problem consuming time of tuning process in prior art is solved.Achieve by locking fixing frequency tuning, accelerate tuning speed, improve tuning efficiency, meet user's request.
As it is shown in figure 1, first embodiment of the invention proposes a kind of channel search method based on digital signal, including:
Step S1, server generates transmission data, and transfers data to television terminal described in transmission, and described transmission data include fixing frequency.
The executive agent of the inventive method can be a kind of TV channel searching system, and the present embodiment is illustrated with TV channel searching system, is certainly also not limited to this, it is also possible to be other equipment being capable of program search feature or systems.
Specifically, the server of TV channel searching system generates transmission data, and sends the television terminal transferring data to TV channel searching system, and transmission data include fixing frequency.
Wherein, the server of TV channel searching system obtains program data, is packaged by program data, generates corresponding transmission stream；When implementing, first server obtains the program data of each frequency, the program information data of each frequency is packaged packing again, generation meets DVB (DigitalVideoBroadcasting, DVB) and MPEG-2 (MovingPictureExpertsGroup, Motion Picture Experts Group) TS stream (TransportStream, transmission stream) of standard, it is assumed that this TS stream is: TS0.
Wherein, the program data structure content of above-mentioned each frequency can be as shown in Figure 2.
Wherein, the server at TV channel searching system completes to obtain program data, is packaged by program data, and after generating corresponding transmission stream, transmission stream is modulated by the server of TV channel searching system；When implementing, above-mentioned TS0 can be transmitted stream and carry out QAM modulation (QuadratureAmplitudeModulation by server, quadrature amplitude modulation), certain server can also pass through other can make TS0 transmit the modulation system that stream is transmitted.
Wherein, after the server of TV channel searching system completes transmission stream is modulated, the server of TV channel searching system, according to the transmission stream after modulation, inserts fixing frequency in subsequent transmission stream, and subsequent transmission stream is modified；When implementing, assume that above-mentioned subsequent transmission stream is TS1 transmission stream, this TS1 transmission stream is provided with NIT table (NetworkInformationTable, network information table), with transmitting the network information, as: frequency point information, symbol rate, modulation system and download pid information etc.；Server can insert fixing frequency T in the NIT table of TS1 transmission stream, simultaneously, first server can inquire about the NIT table of TS1 transmission stream, then the frequency point information of Linkage_descriptor () describing word in the NIT table of the TS0 transmission stream after modulation, modulation system, symbol rate and download pid information etc. are filled the Linkage_descriptor () describing word to the NIT table of TS1 transmission stream.
Wherein, server at TV channel searching system completes the transmission stream after according to modulation, subsequent transmission stream is modified, and after inserting fixing frequency in subsequent transmission stream, transmission stream after modulation and revised subsequent transmission stream are carried out multiplexing by the server of TV channel searching system, generate transmission data, and send to television terminal；When implementing, server can pass through the mode of frequency division multiplexing (FDM), time division multiplex (TDM) or code division multiplexing (CDM), transmission stream after modulation and revised subsequent transmission stream are carried out multiplexing, generate transmission data and enter cable television network, and send to television terminal.
Step S2, described television terminal receives described transmission data, obtains the frequency point information of described transmission data according to described fixing frequency.
Specifically, the server at TV channel searching system completes to generate transmission data, and after sending and transferring data to the television terminal of TV channel searching system, the television terminal of TV channel searching system receives transmission data, obtains the frequency point information of transmission data according to fixing frequency.
Wherein, the television terminal of TV channel searching system receives transmission data, the fixing frequency of locking；When implementing, first television terminal receives above-mentioned transmission data, then locks above-mentioned fixing frequency T.
Wherein, the television terminal at TV channel searching system completes to receive transmission data, and after the fixing frequency of locking, the television terminal of TV channel searching system, according to fixing frequency, resolves transmission data, obtains the frequency point information of described transmission data；When implementing, television terminal, according to fixing frequency, obtains above-mentioned TS1 transmission stream；Then resolve the NIT table of TS1 transmission stream, from the NIT table of TS1 transmission stream, obtain the frequency point information of correspondence.
Step S3, described television terminal is according to described frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to described programme information.
Specifically, television terminal at TV channel searching system completes to receive transmission data, and obtain the frequency point information of transmission data according to fixing frequency after, the television terminal of TV channel searching system is according to frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to programme information.
Wherein, television terminal can according to frequency point information, the frequency at locking TS0 transmission stream place, the programme information of corresponding frequency is downloaded in television terminal, then the programme information of above-mentioned corresponding frequency is written in data base, last television terminal is preset for each programme information by the software of television terminal, it is achieved the function of search of digital program.
By such scheme, the invention provides a kind of quickly channel search method, it is achieved that by locking fixing frequency tuning, accelerate tuning speed, improve tuning efficiency, meet user's request.
Further, in order to accelerate tuning speed better, improve tuning efficiency, with reference to Fig. 3, generate transmission data for server in the specific embodiment of the invention, and described in transmission, transfer data to a kind of schematic flow sheet of the step of television terminal.
As a kind of embodiment, above-mentioned steps S1 includes:
Step S11, described server obtains program data, is packaged by described program data, generates corresponding transmission stream.
Specifically, the server of TV channel searching system obtains program data, is packaged by program data, generates corresponding transmission stream.
Wherein, first server obtains the program data of each frequency, then the program information data of each frequency is packaged packing, generates the TS stream meeting DVB and Moving Picture Experts Group-2, it is assumed that this TS stream is: TS0.
Wherein, the program data structure content of above-mentioned each frequency can be as shown in Figure 2.
Step S12, described transmission stream is modulated by described server.
Specifically, the server at TV channel searching system completes to obtain program data, is packaged by program data, and after generating corresponding transmission stream, transmission stream is modulated by the server of TV channel searching system.
Wherein, above-mentioned TS0 can be transmitted stream and carry out QAM modulation by server, and certain server can also pass through other can make TS0 transmit the modulation system that stream is transmitted.
Step S13, described server, according to the described transmission stream after modulation, inserts described fixing frequency in subsequent transmission stream, and described subsequent transmission stream is modified.
Specifically, after the server of TV channel searching system completes transmission stream is modulated, the server of TV channel searching system, according to the transmission stream after modulation, inserts fixing frequency in subsequent transmission stream, and subsequent transmission stream is modified.
Wherein, when implementing, it is assumed that above-mentioned subsequent transmission stream is TS1 transmission stream, is provided with NIT table, is used for transmitting the network information in this TS1 transmission stream, as: frequency point information, symbol rate, modulation system and download pid information etc.；Server can insert fixing frequency T in the NIT table of TS1 transmission stream, simultaneously, first server can inquire about the NIT table of TS1 transmission stream, then the frequency point information of Linkage_descriptor () describing word in the NIT table of the TS0 transmission stream after modulation, modulation system, symbol rate and download pid information etc. are filled the Linkage_descriptor () describing word to the NIT table of TS1 transmission stream.
Step S14, the described transmission stream after modulation and revised described subsequent transmission stream are carried out multiplexing by described server, generate described transmission data, and send to described television terminal.
Specifically, server at TV channel searching system completes the transmission stream after according to modulation, subsequent transmission stream inserts fixing frequency, and after subsequent transmission stream is modified, transmission stream after modulation and revised subsequent transmission stream are carried out multiplexing by the server of TV channel searching system, generate transmission data, and send to television terminal.
Wherein, server can pass through the mode of frequency division multiplexing (FDM), time division multiplex (TDM) or code division multiplexing (CDM), transmission stream after modulation and revised subsequent transmission stream are carried out multiplexing, generate transmission data and enter cable television network, and send to television terminal.
By such scheme, the invention provides a kind of quickly channel search method, achieve by locking fixing frequency tuning better, accelerate tuning speed, improve tuning efficiency, meet user's request.
Further, in order to accelerate tuning speed better, improve tuning efficiency, with reference to Fig. 4, for server in the specific embodiment of the invention according to the described transmission stream after modulation, subsequent transmission stream is modified, and resumes a kind of schematic flow sheet of the step inserting described fixing frequency in defeated stream in the rear.
As a kind of embodiment, above-mentioned steps S13 includes:
Step S131, the NIT table of subsequent transmission stream described in described server lookup.
Specifically, after the server of TV channel searching system completes transmission stream is modulated, the NIT table of the server lookup subsequent transmission stream of TV channel searching system.
Wherein, if above-mentioned subsequent transmission stream is TS1 transmission stream, then TS1 transmission stream is provided with NIT table, for transmitting the network information, as: frequency point information, symbol rate, modulation system and download pid information etc., the above-mentioned network information can be stored in the Linkage_descriptor () describing word in NIT table；Server finds the Linkage_descriptor () describing word in the NIT table of TS1 transmission stream.
Step S132, the described frequency point information in the NIT table in the described transmission stream after modulation, modulation system, symbol rate and download PID are filled to the NIT table of described subsequent transmission stream by described server.
Specifically, after the server of TV channel searching system completes the NIT table of inquiry subsequent transmission stream, the frequency point information in the NIT table in the transmission stream after modulation, modulation system, symbol rate and download PID are filled to the NIT table of subsequent transmission stream by the server of TV channel searching system.
Wherein, when implementing, server can realize filling in the Linkage_descriptor () describing word in the NIT table that the above-mentioned network information to TS1 transmission is flowed by the execution of following code:
Step S133, described server resumes in the rear in the NIT table of defeated stream and inserts described fixing frequency.
Specifically, after frequency point information in the NIT table that the server of TV channel searching system completes in the transmission stream after by modulation, modulation system, symbol rate and download PID fill to the NIT table of subsequent transmission stream, the server of TV channel searching system inserts in the NIT table of subsequent transmission stream fixes frequency.
Wherein, when implementing, server can insert fixing frequency T in the NIT table of TS1 transmission stream.
By such scheme, the invention provides a kind of quickly channel search method, achieve by locking fixing frequency tuning better, accelerate tuning speed, improve tuning efficiency, meet user's request.
Further, in order to accelerate tuning speed better, improve tuning efficiency, with reference to Fig. 5, receive described transmission data for television terminal in the specific embodiment of the invention, obtain a kind of schematic flow sheet of the step of the frequency point information of described transmission data according to described fixing frequency.
As a kind of embodiment, above-mentioned steps S2 includes:
Step S21, described television terminal receives described transmission data, locks described fixing frequency.
Specifically, the television terminal of TV channel searching system receives transmission data, the fixing frequency of locking.
Wherein, first television terminal receives above-mentioned transmission data, then locks above-mentioned fixing frequency T.
Step S22, described television terminal, according to described fixing frequency, resolves described transmission data, obtains the frequency point information of described transmission data.
Specifically, the television terminal at TV channel searching system completes to receive transmission data, and after the fixing frequency of locking, the television terminal of TV channel searching system, according to fixing frequency, resolves transmission data, obtains the frequency point information of described transmission data.
Wherein, television terminal, according to fixing frequency, obtains above-mentioned TS1 transmission stream；Then resolve the NIT table of TS1 transmission stream, from the NIT table of TS1 transmission stream, obtain the frequency point information of correspondence.
By such scheme, the invention provides a kind of quickly channel search method, achieve by locking fixing frequency tuning better, accelerate tuning speed, improve tuning efficiency, meet user's request.
Further, in order to accelerate tuning speed better, improve tuning efficiency, with reference to Fig. 6, for television terminal in the specific embodiment of the invention according to described fixing frequency, resolve a kind of schematic flow sheet of the step of described transmission data.
As a kind of embodiment, above-mentioned steps S22 includes:
Step S221, described television terminal, according to described fixing frequency, obtains described subsequent transmission stream.
Specifically, the television terminal at TV channel searching system completes to receive transmission data, after the fixing frequency of locking, and the television terminal of TV channel searching system, obtain subsequent transmission stream according to fixing frequency.
Step S222, described television terminal resolves the NIT table in described subsequent transmission stream, obtains described frequency point information.
Specifically, after the television terminal of TV channel searching system completes to obtain subsequent transmission stream according to fixing frequency, television terminal resolves the NIT table in subsequent transmission stream, obtains frequency point information.
Wherein, television terminal filters the NIT table of PID:0x0010, resolves TS1 and transmits the Linkage_Descriptor () describing word of the NIT table in stream, obtains the frequency point information at TS0 transmission stream place.
By such scheme, the invention provides a kind of quickly channel search method, achieve by locking fixing frequency tuning better, accelerate tuning speed, improve tuning efficiency, meet user's request.
Based on the realization of said method embodiment, the present invention also provides for the system embodiment of correspondence.
As it is shown in fig. 7, first embodiment of the invention proposes a kind of channel searching system based on digital signal, including:
Server A, is used for generating transmission data, and transfers data to television terminal described in transmission, and described transmission data include fixing frequency.
The executive agent of present system can be a kind of TV channel searching system, and the present embodiment is illustrated with TV channel searching system, and being certainly also not limited to other can the equipment of program searching or system.
Specifically, the server A of TV channel searching system generates transmission data, and sends the television terminal B transferring data to TV channel searching system, and transmission data include fixing frequency.
Wherein, the server A of TV channel searching system obtains program data, is packaged by program data, generates corresponding transmission stream；When implementing, first server A obtains the program data of each frequency, then the program information data of each frequency is packaged packing, generates the TS stream meeting DVB and Moving Picture Experts Group-2, it is assumed that this TS stream is: TS0.
Wherein, the program data structure content of above-mentioned each frequency can be as shown in Figure 2.
Wherein, the server A at TV channel searching system completes to obtain program data, is packaged by program data, and after generating corresponding transmission stream, transmission stream is modulated by the server A of TV channel searching system；When implementing, above-mentioned TS0 can be transmitted stream and carry out QAM modulation by server A, and certain server A can also pass through other can make TS0 transmit the modulation system that stream is transmitted.
Wherein, after the server A of TV channel searching system completes transmission stream is modulated, the server A of TV channel searching system, according to the transmission stream after modulation, is inserted fixing frequency in subsequent transmission stream, and subsequent transmission stream is modified；When implementing, it is assumed that above-mentioned subsequent transmission stream is that TS1 transmits stream, this TS1 transmission stream is provided with NIT table, with transmitting the network information, as: frequency point information, symbol rate, modulation system and download pid information etc.；Server A can insert fixing frequency T in the NIT table of TS1 transmission stream, simultaneously, first server A can inquire about the NIT table of TS1 transmission stream, again the frequency point information of Linkage_descriptor () describing word in the NIT table of the TS0 transmission stream after modulation, modulation system, symbol rate and download pid information etc. are filled to the NIT table of TS1 transmission stream, meanwhile, server A can transmit the Linkage_descriptor () describing word in the NIT table of stream at TS1.
Wherein, server A at TV channel searching system completes the transmission stream after according to modulation, subsequent transmission stream is modified, and after inserting fixing frequency in subsequent transmission stream, transmission stream after modulation and revised subsequent transmission stream are carried out multiplexing by the server A of TV channel searching system, generate transmission data, and send to television terminal B；When implementing, server A can pass through the mode of frequency division multiplexing (FDM), time division multiplex (TDM) or code division multiplexing (CDM), transmission stream after modulation and revised subsequent transmission stream are carried out multiplexing, generate transmission data and enter cable television network, and send to television terminal B.
Television terminal B, is used for receiving described transmission data, obtains the frequency point information of described transmission data according to described fixing frequency.
Specifically, the server A at TV channel searching system completes to generate transmission data, and after sending and transferring data to the television terminal B of TV channel searching system, the television terminal B of TV channel searching system receives transmission data, obtains the frequency point information of transmission data according to fixing frequency.
Wherein, the television terminal B of TV channel searching system receives transmission data, the fixing frequency of locking；When implementing, first television terminal B receives above-mentioned transmission data, then locks above-mentioned fixing frequency T.
Wherein, completing to receive transmission data at the television terminal B of TV channel searching system, after the fixing frequency of locking, the television terminal B of TV channel searching system, according to fixing frequency, resolves transmission data, obtains the frequency point information of described transmission data；When implementing, television terminal B, according to fixing frequency, obtains above-mentioned TS1 transmission stream；Then resolve the NIT table of TS1 transmission stream, from the NIT table of TS1 transmission stream, obtain the frequency point information of correspondence.
Television terminal B, is additionally operable to according to described frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to described programme information.
Specifically, completing to receive transmission data at the television terminal B of TV channel searching system, obtain the frequency point information of transmission data according to fixing frequency after, the television terminal B of TV channel searching system is according to frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to described programme information.
Wherein, television terminal B can according to frequency point information, the frequency at locking TS0 transmission stream place, the programme information of corresponding frequency is downloaded in television terminal B, then the programme information of above-mentioned corresponding frequency is written in data base, last television terminal B is preset for each programme information by the software of television terminal B, it is achieved the function of search of digital program.
By such scheme, the invention provides a kind of quickly channel searching system, it is achieved that by locking fixing frequency tuning, accelerate tuning speed, improve tuning efficiency, meet user's request.
Further, in order to accelerate tuning speed better, improve tuning efficiency, above-mentioned server A, be additionally operable to obtain program data, described program data is packaged, generate corresponding transmission stream；Described transmission stream is modulated；According to the described transmission stream after modulation, subsequent transmission stream is modified, and resumes in the rear defeated stream inserts described fixing frequency；Described transmission stream after modulation and revised described subsequent transmission stream are carried out multiplexing, generates described transmission data, and send to described television terminal.
Specifically, the server A of TV channel searching system obtains program data, is packaged by program data, generates corresponding transmission stream.
Wherein, first server A obtains the program data of each frequency, then the program information data of each frequency is packaged packing, generates the TS stream meeting DVB and Moving Picture Experts Group-2, it is assumed that this TS stream is: TS0.
Wherein, the program data structure content of above-mentioned each frequency can be as shown in Figure 2.
Server A at TV channel searching system completes to obtain program data, is packaged by program data, and after generating corresponding transmission stream, transmission stream is modulated by the server A of TV channel searching system.
Wherein, above-mentioned TS0 can be transmitted stream and carry out QAM modulation by server A, and certain server A can also pass through other can make TS0 transmit the modulation system that stream is transmitted.
After the server A of TV channel searching system completes transmission stream is modulated, the server A of TV channel searching system, according to the transmission stream after modulation, is inserted fixing frequency in subsequent transmission stream, and subsequent transmission stream is modified.
Wherein, when implementing, it is assumed that above-mentioned subsequent transmission stream is TS1 transmission stream, is provided with NIT table, is used for transmitting the network information in this TS1 transmission stream, as: frequency point information, symbol rate, modulation system and download pid information etc.；Server A can insert fixing frequency T in the NIT table of TS1 transmission stream, simultaneously, first server A can inquire about the NIT table of TS1 transmission stream, then the frequency point information of Linkage_descriptor () describing word in the NIT table of the TS0 transmission stream after modulation, modulation system, symbol rate and download pid information etc. are filled the Linkage_descriptor () describing word to the NIT table of TS1 transmission stream.
Server A at TV channel searching system completes the transmission stream after according to modulation, subsequent transmission stream inserts fixing frequency, and after subsequent transmission stream is modified, transmission stream after modulation and revised subsequent transmission stream are carried out multiplexing by the server A of TV channel searching system, generate transmission data, and send to television terminal B
Wherein, server A can pass through the mode of frequency division multiplexing (FDM), time division multiplex (TDM) or code division multiplexing (CDM), transmission stream after modulation and revised subsequent transmission stream are carried out multiplexing, generate transmission data and enter cable television network, and send to television terminal B.
By such scheme, the invention provides a kind of quickly channel searching system, achieve by locking fixing frequency tuning better, accelerate tuning speed, improve tuning efficiency, meet user's request.
Further, in order to accelerate tuning speed better, improve tuning efficiency, above-mentioned server A, be additionally operable to inquire about the NIT table of described subsequent transmission stream；Described frequency point information in NIT table in described transmission stream after modulation, modulation system, symbol rate and download PID are filled to the NIT table of described subsequent transmission stream；Resume in the rear and the NIT table of defeated stream inserts described fixing frequency.
Specifically, after the server A of TV channel searching system completes transmission stream is modulated, the NIT table of the server A queries subsequent transmission stream of TV channel searching system.
Wherein, if above-mentioned subsequent transmission stream is TS1 transmission stream, then TS1 transmission stream is provided with NIT table, for transmitting the network information, as: frequency point information, symbol rate, modulation system and download pid information etc., the above-mentioned network information can be stored in the Linkage_descriptor () describing word in NIT table；Server A finds the Linkage_descriptor () describing word in the NIT table of TS1 transmission stream.
After the server A of TV channel searching system completes the NIT table of inquiry subsequent transmission stream, the frequency point information in the NIT table in the transmission stream after modulation, modulation system, symbol rate and download PID are filled to the NIT table of subsequent transmission stream by the server A of TV channel searching system.
Wherein, when implementing, server A can realize filling in the Linkage_descriptor () describing word in the NIT table that the above-mentioned network information to TS1 transmission is flowed by the execution of following code:
After frequency point information in the NIT table that the server A of TV channel searching system completes in the transmission stream after by modulation, modulation system, symbol rate and download PID fill to the NIT table of subsequent transmission stream, the server A of TV channel searching system is inserted in the NIT table of subsequent transmission stream and is fixed frequency.
Wherein, when implementing, server A can insert fixing frequency T in the NIT table of TS1 transmission stream.
By such scheme, the invention provides a kind of quickly channel searching system, achieve by locking fixing frequency tuning better, accelerate tuning speed, improve tuning efficiency, meet user's request.
Further, in order to accelerate tuning speed better, improve tuning efficiency, above-mentioned television terminal B, be additionally operable to receive described transmission data, lock described fixing frequency；According to described fixing frequency, resolve described transmission data, obtain the frequency point information of described transmission data.
Specifically, the television terminal B of TV channel searching system receives transmission data, the fixing frequency of locking.
Wherein, first television terminal B receives above-mentioned transmission data, then locks above-mentioned fixing frequency T.
Completing to receive transmission data at the television terminal B of TV channel searching system, after the fixing frequency of locking, the television terminal B of TV channel searching system, according to fixing frequency, resolves transmission data, obtains the frequency point information of described transmission data.
Wherein, television terminal B, according to fixing frequency, obtains above-mentioned TS1 transmission stream；Then resolve the NIT table of TS1 transmission stream, from the NIT table of TS1 transmission stream, obtain the frequency point information of correspondence.
By such scheme, the invention provides a kind of quickly channel searching system, achieve by locking fixing frequency tuning better, accelerate tuning speed, improve tuning efficiency, meet user's request.
Further, in order to accelerate tuning speed better, improve tuning efficiency, above-mentioned television terminal B, be additionally operable to, according to described fixing frequency, obtain described subsequent transmission stream；Resolve the NIT table in described subsequent transmission stream, obtain described frequency point information.
Specifically, complete to receive transmission data at the television terminal B of TV channel searching system, after the fixing frequency of locking, the television terminal B of TV channel searching system, obtain subsequent transmission stream according to fixing frequency.
After the television terminal B of TV channel searching system completes to obtain subsequent transmission stream according to fixing frequency, television terminal B resolves the NIT table in subsequent transmission stream, obtains frequency point information.
Wherein, television terminal B filters the NIT table of PID:0x0010, resolves TS1 and transmits the Linkage_Descriptor () describing word of the NIT table in stream, obtains the frequency point information at TS0 transmission stream place.
By such scheme, the invention provides a kind of quickly channel searching system, achieve by locking fixing frequency tuning better, accelerate tuning speed, improve tuning efficiency, meet user's request.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (10)
1. the channel search method based on digital signal, it is characterised in that described method includes:
Server generates transmission data, and transfers data to television terminal described in transmission, and described transmission data include fixing frequency；
Described television terminal receives described transmission data, obtains the frequency point information of described transmission data according to described fixing frequency；
Described television terminal is according to described frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to described programme information.
2. method according to claim 1, it is characterised in that described server generates transmission data, and the step transferring data to television terminal described in transmission includes:
Described server obtains program data, is packaged by described program data, generates corresponding transmission stream；
Described transmission stream is modulated by described server；
Described server, according to the described transmission stream after modulation, inserts described fixing frequency in subsequent transmission stream, and described subsequent transmission stream is modified；
Described transmission stream after modulation and revised described subsequent transmission stream are carried out multiplexing by described server, generate described transmission data, and send to described television terminal.
3. method according to claim 2, it is characterised in that the described transmission stream after described modulation includes NIT table, preserves frequency point information, modulation system, symbol rate and download PID in described NIT table；
Subsequent transmission stream, according to the described transmission stream after modulation, is modified, and resumes the step inserting described fixing frequency in defeated stream in the rear and include by described server:
The NIT table of subsequent transmission stream described in described server lookup；
Described frequency point information in NIT table in described transmission stream after modulation, modulation system, symbol rate and download PID are filled to the NIT table of described subsequent transmission stream by described server；
Described server resumes in the rear in the NIT table of defeated stream and inserts described fixing frequency.
4. method according to claim 3, it is characterised in that described television terminal receives described transmission data, includes according to the step of the frequency point information of the described fixing frequency described transmission data of acquisition:
Described television terminal receives described transmission data, locks described fixing frequency；
Described television terminal, according to described fixing frequency, resolves described transmission data, obtains the frequency point information of described transmission data.
5. method according to claim 4, it is characterised in that described television terminal is according to described fixing frequency, and the step resolving described transmission data includes:
Described television terminal, according to described fixing frequency, obtains described subsequent transmission stream；
Described television terminal resolves the NIT table in described subsequent transmission stream, obtains described frequency point information.
6. the channel searching system based on digital signal, it is characterised in that described system includes:
Server, is used for generating transmission data, and transfers data to television terminal described in transmission, and described transmission data include fixing frequency；
Television terminal, is used for receiving described transmission data, obtains the frequency point information of described transmission data according to described fixing frequency；And according to described frequency point information, the programme information that storage is corresponding, and it is default to carry out program according to described programme information.
7. system according to claim 6, it is characterised in that described server is additionally operable to:
Obtain program data, described program data is packaged, generate corresponding transmission stream；
Described transmission stream is modulated；
According to the described transmission stream after modulation, subsequent transmission stream inserts described fixing frequency, and described subsequent transmission stream is modified；
Described transmission stream after modulation and revised described subsequent transmission stream are carried out multiplexing, generates described transmission data, and send to described television terminal.
8. system according to claim 7, it is characterised in that described server is additionally operable to:
Inquire about the NIT table of described subsequent transmission stream；
Described frequency point information in NIT table in described transmission stream after modulation, modulation system, symbol rate and download PID are filled to the NIT table of described subsequent transmission stream；
Resume in the rear and the NIT table of defeated stream inserts described fixing frequency.
9. system according to claim 8, it is characterised in that described television terminal is additionally operable to:
Receive described transmission data, lock described fixing frequency；
According to described fixing frequency, resolve described transmission data, obtain the frequency point information of described transmission data.
10. system according to claim 9, it is characterised in that described television terminal is additionally operable to:
According to described fixing frequency, obtain described subsequent transmission stream；
Resolve the NIT table in described subsequent transmission stream, obtain described frequency point information.
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| CN201610080708.1A CN105721930A (en) | 2016-02-04 | 2016-02-04 | Channel searching method and system based on digital signal |
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| CN201610080708.1A CN105721930A (en) | 2016-02-04 | 2016-02-04 | Channel searching method and system based on digital signal |
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| CN201610080708.1A Pending CN105721930A (en) | 2016-02-04 | 2016-02-04 | Channel searching method and system based on digital signal |
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Application publication date: 20160629 |