CN101917571A - Method, device and set-top box for automatically searching cable television channels - Google Patents
Method, device and set-top box for automatically searching cable television channels Download PDFInfo
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- CN101917571A CN101917571A CN 201010270495 CN201010270495A CN101917571A CN 101917571 A CN101917571 A CN 101917571A CN 201010270495 CN201010270495 CN 201010270495 CN 201010270495 A CN201010270495 A CN 201010270495A CN 101917571 A CN101917571 A CN 101917571A
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Abstract
The invention relates to a method, a device and a set-top box for automatically searching cable television channels. The method comprises the following steps of: 1, reading and locking a main frequency point; 2, analyzing an NIT list of the main frequency point to acquire frequency point list information; and 3, analyzing a PAT table and an SDT table of each frequency point in a frequency point list so as to acquire and save channel information. The device comprises a main frequency point locking unit, a first analysis unit and a second analysis unit, wherein the main frequency point locking unit is used for reading and locking the main frequency point; the first analysis unit is used for analyzing the NIT list of the main frequency point to acquire the frequency point list information; and the second analysis unit is used for analyzing the PAT table and the SDT table of each frequency point in the frequency point list so as to acquire and save the channel information. The set-top box comprises a receiving unit, a decoding unit, a main processing unit and a memory unit. The automatic searching scheme of the invention simplifies the conventional channel searching flow, shortens the automatic searching time of the channel, improves the automatic searching speed of the channel, provides better user experience and also effectively saves the storage space.
Description
Technical field
The present invention relates to the cable digital TV search field, more particularly, relate to a kind of method, device and set-top box of automatically searching cable television channels.
Background technology
Development along with cable digital TV, channel source is more and more, and the channel of Cable Network network the inside transmission is more and more, and the frequency that need play Digital Television is also more and more, along with the increase of high definition channel quantity, the frequency quantity that needs also can increase fast.In traditional channel searching method, a frequency needs 4～5 second time.If 30 frequencies are arranged in the network, finishing automatic search so needs 120～150 second time, has caused the channel search overlong time.At present the channel of cable digital TV substantially all is an encoded channel, and cipher mode is various, if preserve enciphered message channel search the time, needs a large amount of memory spaces.And the audio/video information of channel, sequencing control information, enciphered message change very fast, and the pmt table that need resolve channel during broadcasting channel is can obtain and use the up-to-date audio/video information of channel, sequencing control information, enciphered message.
And cable digital TV operator increases, and deletes channel, all needs set-top box auto channel search again, finishes the renewal of channel, can expect, the execution frequency of search can be more and more higher automatically for channel.
Summary of the invention
The technical problem to be solved in the present invention is, at the defective that the automatic search step of above-mentioned channel is many, search time is long of prior art, provides a kind of method, device and set-top box of automatically searching cable television channels.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of method of automatically searching cable television channels, comprising:
S1, read and lock the dominant frequency point;
The NIT tabulation of S2, parsing dominant frequency point is to obtain the frequency list information;
S3, the pat table of resolving each frequency in the frequency tabulation and SDT table, and then obtain channel information and preservation.
In method of the present invention, step S2 specifically comprises:
Resolve the NIT tabulation of dominant frequency point, obtain the frequency list information, and set up the channel list index, the numbering i of each frequency is the natural number (N＞1) of 1～N in the frequency tabulation.
In method of the present invention, step S3 specifically comprises:
S31, the current frequency numbering i=1 that need to resolve in the channel list is set, locks this frequency and resolve the pat table and the SDT table of this frequency;
S32, judge whether current frequency numbering of need resolving is N, if not, then will number i and add 1, returns step S31; If then enter step S33;
S33, obtain channel information and preserve.
In method of the present invention, described dominant frequency point is predefined.
In method of the present invention, described channel information comprises: the PID of the pmt table of the frequency at channel place, channel designation, channel type, channel.
In method of the present invention, described pmt table comprises audio/video information, sequencing control information, the enciphered message of channel.
In method of the present invention, described NIT table comprises the frequency list information that transmits in the network;
Described pat table comprises the PID of the pmt table of the channel quantity of frequency correspondence and each channel;
Described SDT table comprises the channel designation and the channel type of frequency correspondence.
The present invention also provides a kind of device of automatically searching cable television channels, comprising:
Dominant frequency point lock cell is used to read and locks the dominant frequency point;
First resolution unit is used to resolve the NIT tabulation of dominant frequency point to obtain the frequency list information;
Second resolution unit is used for resolving the pat table and the SDT table of each frequency of frequency tabulation, and then obtains channel information and preservation.
In device of the present invention, described channel information comprises: the PID of the pmt table of the frequency at channel place, channel designation, channel type, channel.
The present invention also provides a kind of set-top box, comprising:
Receiving element is used to receive the automatic search instruction from the user, and feeds back to Main Processor Unit;
Tuned cell is used for carrying out locking frequency point work in locking frequency point when instruction that receives Main Processor Unit, and will lock the result and feed back to Main Processor Unit;
Decoding unit is used for when the channel information that receives Main Processor Unit obtains instruction, resolves the pat table that obtains each frequency and the SDT table of each frequency, and then obtains the channel information of each frequency correspondence;
Main Processor Unit is used for instructing to tuned cell according to the automatic search instruction transmission locking frequency point of receiving element feedback, and receives the locking result of tuned cell feedback; And, send channel information according to the locking result of tuned cell feedback and obtain instruction, and the channel information that receives the decoding unit feedback obtains the result to decoding unit; And, obtain the result according to the channel signals of decoding unit and send and hold instruction to memory cell;
Memory cell is used for preserving channel information when receiving the holding instruction of Main Processor Unit.
The invention has the beneficial effects as follows: in automatic search procedure, only resolve pat table and SDT table, do not resolve pmt table television channel, simplify the traditional channel search routine, shorten channel and search the plain time automatically, improve the channel speed of search automatically, provide better experience to digital cable customers.And the solution of the present invention also can effectively be saved the internal storage space of set-top box.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the method flow schematic diagram according to the automatically searching cable television channels of one embodiment of the invention;
Fig. 2 is the detailed process schematic diagram of the method for automatically searching cable television channels shown in Figure 1;
Fig. 3 is the apparatus structure schematic diagram according to the automatically searching cable television channels of one embodiment of the invention;
Fig. 4 is the set-top box structural representation according to one embodiment of the invention.
Embodiment
The channel of cable digital TV substantially all is an encoded channel, and cipher mode is various, if preserve enciphered message channel search the time, needs a large amount of memory spaces.And channel information changes very fast, and the pmt table that need resolve channel during broadcasting channel to be obtaining and to use the up-to-date information of channel, and the pmt table that also will resolve channel in search procedure is just apparent unnecessary.And in the conventional method behind the PID that obtains the channel pmt table, according to this PID search pmt table, obtain the information such as audio/video information, sequencing control information, enciphered message of channel, and these information preserved as channel information.And the present invention does not search for pmt table in the automatic search procedure to television channel, only preserves the PID of pmt table, does not preserve information such as audio/video information, sequencing control information, enciphered message.Can effectively shorten the time of channel search, and, owing to only preserve the PID of the pmt table of channel, do not preserve the information such as audio/video information, sequencing control information, enciphered message of channel, also can effectively save the internal storage space of set-top box.
Fig. 1 is method 100 schematic flow sheets according to the automatically searching cable television channels of one embodiment of the invention.
Step 101 reads and locks the dominant frequency point.Described dominant frequency point is predefined by operator, so that channel search.
Step 102, the NIT tabulation of resolving dominant frequency point is to obtain the frequency list information.
Wherein, the NIT table is a formatted data of mpeg standard the inside definition, and in the data transmission stream the inside transmission that frequency indicates, NIT table data owner will comprise the frequency point information of transmitting in the network.
Step 103 is resolved the pat table and the SDT table of each frequency in the frequency tabulation, and then is obtained channel information and preservation.
Wherein, described pat table and SDT table all are formatted datas of mpeg standard the inside definition, transmission inside the data transmission stream that frequency indicates.The pat table data owner will comprise this frequency for what channels, the PID of the pmt table of each channel.SDT table data owner will comprise the channel designation and the channel type of this frequency correspondence.
In an embodiment of the present invention, channel information comprises: the PID of the pmt table of the frequency at channel place, channel designation, channel type, channel.Pmt table comprises audio/video information, sequencing control information, the enciphered message of channel.
Wherein, step 102 specifically comprises: resolve the NIT tabulation of dominant frequency point, obtain the frequency list information, and set up the channel list index, the numbering i of each frequency is the natural number (N＞1) of 1～N in the frequency tabulation.
Step 103 specifically comprises:
Step 1031, the current frequency numbering i=1 that need to resolve in the channel list is set, locks this frequency and resolve the pat table and the SDT table of this frequency;
Step 1032, judge whether current frequency numbering of need resolving is N, if not, then will number i and add 1, returns step S31; If then enter step S33;
Step 1033, obtain channel information and preserve.
About the detailed process of the method for automatically searching cable television channels shown in Figure 1 referring to shown in Figure 2.
In the step 201, the main frequency point information of reading pre-set is as the foundation of step 202.
In the step 202, at first lock the dominant frequency point, go to obtain the channel list information in the NIT table of dominant frequency point, set up the frequency list index, respectively to the frequency numbering from 1 to N, N is the positive integer greater than 1 generally speaking.Particularly point out, the N frequency points that this step is obtained is unfixed, and is different and different according to actual conditions.
In the step 203, whether determining step 202 successful execution, if success enters step 204; If failure finishes search.
In the step 204, the current frequency that needs to resolve is set numbers i=1;
In the step 205, locked frequency point numbering i frequency points corresponding is obtained the PAT of frequency code stream information the inside then, the SDT form data, thus obtain channel information.Described channel information comprises: the PID of the pmt table of the frequency at channel place, channel designation, channel type, channel.Generally speaking, the channel number of a frequency correspondence is such as but not limited to 8.
In the step 206, whether determining step 205 successful execution, if success enters step 207; If failure finishes search.
In the step 207, judge whether current frequency numbering i equals N, if equal N, all frequencies in the tabulation of the frequency in the description of step 202 are all resolved and finished so, enter step 208; If be not equal to N, illustrate to search for and do not finish, enter step 209.
In the step 209, frequency numbering i adds up 1, enters step S205 then.
Among the step S208, the information such as frequency, channel designation, channel type at the channel place of search are saved in the memory.Finish channel search, the system resource that takies in the dispose procedure, other operations of response user.
Fig. 3 is the apparatus structure schematic diagram according to the automatically searching cable television channels of one embodiment of the invention, comprising: dominant frequency point lock cell 301, first resolution unit 302, second resolution unit 303.
Dominant frequency point lock cell 301 is used to read and locks the dominant frequency point;
Fig. 4 is the set-top box structural representation according to one embodiment of the invention, comprising: receiving element 401, tuned cell 402, decoding unit 403, Main Processor Unit 404, memory cell 405.Main Processor Unit 404 is a control appliance, the operate as normal of major control receiving element 401, tuned cell 402, decoding unit 403, memory cell 405.
Receiving element 401 is used to receive the automatic search instruction from the user, and feeds back to Main Processor Unit 404.Automatically search instruction is to be sent by the guidance panel of for example remote controller or television set by the user.
Decoding unit 403, be used for when the channel information that receives Main Processor Unit 404 obtains instruction, resolve the NIT table, obtain the frequency tabulation, resolve the pat table that obtains each frequency and the SDT table of each frequency in the frequency tabulation, and then obtain the channel information of each frequency correspondence.Decoding unit 403 is such as but not limited to the MEPG decoder.Only should be pointed out that under the situation of tuned cell 402 successful locked frequency point, just start decoding unit 403 work.
Memory cell 405 is used for preserving channel information when receiving the holding instruction of Main Processor Unit 404.Memory cell 405 is such as but not limited to the read-write memory device of set-top box.
Should be understood that the formation of set-top box shown in Figure 4 only is easy structure the most, also can comprise other assemblies in the practical application.The set-top box that provides among Fig. 4 can also have other general functions of set-top box itself, for example broadcast of channel etc.
Claims (10)
1. the method for an automatically searching cable television channels is characterized in that, comprising:
S1, read and lock the dominant frequency point;
The NIT tabulation of S2, parsing dominant frequency point is to obtain the frequency list information;
S3, the pat table of resolving each frequency in the frequency tabulation and SDT table, and then obtain channel information and preservation.
2. method according to claim 1 is characterized in that step S2 specifically comprises:
Resolve the NIT tabulation of dominant frequency point, obtain the frequency list information, and set up the channel list index, the numbering i of each frequency is the natural number (N＞1) of 1～N in the frequency tabulation.
3. method according to claim 2 is characterized in that step S3 specifically comprises:
S31, the current frequency numbering i=1 that need to resolve in the channel list is set, locks this frequency and resolve the pat table and the SDT table of this frequency;
S32, judge whether current frequency numbering of need resolving is N, if not, then will number i and add 1, returns step S31; If then enter step S33;
S33, obtain channel information and preserve.
4. method according to claim 1 is characterized in that, described dominant frequency point is predefined.
5. method according to claim 1 is characterized in that, described channel information comprises: the PID of the pmt table of the frequency at channel place, channel designation, channel type, channel.
6. method according to claim 5 is characterized in that, described pmt table comprises audio/video information, sequencing control information, the enciphered message of channel.
7. according to each described method of claim 1～6, it is characterized in that,
Described NIT table comprises the frequency list information that transmits in the network;
Described pat table comprises the PID of the pmt table of the channel quantity of frequency correspondence and each channel;
Described SDT table comprises the channel designation and the channel type of frequency correspondence.
8. the device of an automatically searching cable television channels is characterized in that, comprising:
Dominant frequency point lock cell is used to read and locks the dominant frequency point;
First resolution unit is used to resolve the NIT tabulation of dominant frequency point to obtain the frequency list information;
Second resolution unit is used for resolving the pat table and the SDT table of each frequency of frequency tabulation, and then obtains channel information and preservation.
9. device according to claim 8 is characterized in that, described channel information comprises: the PID of the pmt table of the frequency at channel place, channel designation, channel type, channel.
10. a set-top box is characterized in that, comprising:
Receiving element is used to receive the automatic search instruction from the user, and feeds back to Main Processor Unit;
Tuned cell is used for carrying out locking frequency point work in locking frequency point when instruction that receives Main Processor Unit, and will lock the result and feed back to Main Processor Unit;
Decoding unit is used for when the channel information that receives Main Processor Unit obtains instruction, resolves the pat table that obtains each frequency and the SDT table of each frequency, and then obtains the channel information of each frequency correspondence;
Main Processor Unit is used for instructing to tuned cell according to the automatic search instruction transmission locking frequency point of receiving element feedback, and receives the locking result of tuned cell feedback; And, send channel information according to the locking result of tuned cell feedback and obtain instruction, and the channel information that receives the decoding unit feedback obtains the result to decoding unit; And, obtain the result according to the channel signals of decoding unit and send and hold instruction to memory cell;
Memory cell is used for preserving channel information when receiving the holding instruction of Main Processor Unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010270495A CN101917571B (en) | 2010-09-02 | 2010-09-02 | Method, device and set-top box for automatically searching cable television channels |
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| CN201010270495A CN101917571B (en) | 2010-09-02 | 2010-09-02 | Method, device and set-top box for automatically searching cable television channels |
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| CN101917571B CN101917571B (en) | 2012-10-03 |
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| CN102025940A (en) * | 2010-12-22 | 2011-04-20 | 深圳Tcl新技术有限公司 | Method for searching channel of digital television |
| CN102075807A (en) * | 2011-01-06 | 2011-05-25 | 深圳创维数字技术股份有限公司 | Digital television program searching method, and digital television receiving terminal and transmission system |
| CN102143399A (en) * | 2011-03-31 | 2011-08-03 | 深圳创维数字技术股份有限公司 | Method, server and system for testing limit of channel storage of set-top box |
| CN102158756A (en) * | 2011-04-02 | 2011-08-17 | 深圳创维数字技术股份有限公司 | Set top box program searching method and set top box program searching system |
| CN103647983A (en) * | 2013-12-30 | 2014-03-19 | 深圳Tcl新技术有限公司 | Channel searching method and channel searching system of digital television |
| CN104780444A (en) * | 2015-03-18 | 2015-07-15 | 福建新大陆通信科技股份有限公司 | Method and system for updating set-top box programs at background based on PSI/SI |
| CN105142016A (en) * | 2015-08-12 | 2015-12-09 | 湖南兆华世纪新媒体技术有限公司 | Method for setting centre frequency of terminal in terrestrial digital television multi-frequency network |
| CN107360385A (en) * | 2017-07-19 | 2017-11-17 | 深圳市茁壮网络股份有限公司 | The searching method and system of a kind of channel |
| CN112738622A (en) * | 2019-10-14 | 2021-04-30 | 深圳Tcl数字技术有限公司 | Digital television channel data searching method, terminal and storage medium |
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| CN104780444A (en) * | 2015-03-18 | 2015-07-15 | 福建新大陆通信科技股份有限公司 | Method and system for updating set-top box programs at background based on PSI/SI |
| CN104780444B (en) * | 2015-03-18 | 2018-07-20 | 福建新大陆通信科技股份有限公司 | One kind realizing background update programs of set-top box method and system based on PSI/SI tables |
| CN105142016A (en) * | 2015-08-12 | 2015-12-09 | 湖南兆华世纪新媒体技术有限公司 | Method for setting centre frequency of terminal in terrestrial digital television multi-frequency network |
| CN107360385A (en) * | 2017-07-19 | 2017-11-17 | 深圳市茁壮网络股份有限公司 | The searching method and system of a kind of channel |
| CN107360385B (en) * | 2017-07-19 | 2019-12-17 | 深圳市茁壮网络股份有限公司 | Channel searching method and system |
| CN112738622A (en) * | 2019-10-14 | 2021-04-30 | 深圳Tcl数字技术有限公司 | Digital television channel data searching method, terminal and storage medium |
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