CN105025352A - Digital television channel data packaging method and rapid searching method - Google Patents
Digital television channel data packaging method and rapid searching method Download PDFInfo
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- CN105025352A CN105025352A CN201510433532.9A CN201510433532A CN105025352A CN 105025352 A CN105025352 A CN 105025352A CN 201510433532 A CN201510433532 A CN 201510433532A CN 105025352 A CN105025352 A CN 105025352A
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004806 packaging method and process Methods 0.000 title abstract 5
- 238000012856 packing Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 description 12
- 230000006870 function Effects 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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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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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a digital television channel data packaging method. The method comprises the steps of: obtaining frequency point data and program data of each channel; respectively packaging the frequency point data and program data of each channel to form a PSI/SI information packet, wherein the PSI/SI information packet includes the program information of each channel; and respectively packaging the PSI/SI information packet of each channel into a TS information packet. The invention further provides a digital television channel data rapid searching method. The method comprises the steps of: packaging the channel data of each channel into one TS information packet; obtaining main frequency point data according to set top box built-in parameter configuration of a digital television; setting parameters of a tuner according to the main frequency point data, and determining a broadcast frequency point; setting a filter, and receiving the TS information packet; and analyzing the TS information packets, obtaining data of each channel, and finishing channel data searching. According to the invention, redundant data is removed, data information of all channels can be rapidly obtained in one time of searching, and the waiting time of a user is saved.
Description
Technical field
The present invention relates to digital TV field, refer to a kind of digital television channel data method for packing and method for fast searching especially.
Background technology
After cable TV digitalization, the channel can watched for user is greatly enriched, and generally more than 120 channels, urban channel number is even more than 160.So multichannel, once all searches for, generally consuming time more than 2 minutes.Cable digital TV operator carries out business, channel adjustment is a normal behavior, often adjust once, hundreds of thousands user, even millions of customer need to carry out again channel searching operation, and influence surface is very wide, searches for long poor user experience consuming time, suggestion is larger.
Summary of the invention
The present invention proposes a kind of digital television channel data method for packing and method for fast searching, solves the problem that existing digital television to search channel data is excessively slow.
Technical scheme of the present invention is achieved in that a kind of digital television channel data method for packing, comprises the following steps:
(1) frequency point data and the program data of each channel is obtained;
Step (1) frequency point data and program data comprise the frequency information of channel, Program Association Table, network information table, Program Map Table, application information table, BAT bouquet association table and SDT Service Description Table; Program Association Table, network information table, Program Map Table, application information table, BAT bouquet association table and SDT Service Description Table are packaged into a PSI/SI packets of information.
The number of network information table, application information table, BAT bouquet association table and SDT Service Description Table can be 0, and the number of Program Association Table and application information table is N, N is integer, and N is greater than 1; The number of Program Association Table and SDT Service Description Table is 1; The number of network information table and BAT bouquet association table is no more than 1.
In TS packets of information, first PSI/SI packets of information is only had to be provided with network information table and BAT bouquet association table.
TS packets of information is provided with a PID.
(2) frequency point data of each channel and program data are packaged into a PSI/SI packets of information respectively; PSI/SI packets of information comprises the programme information of each channel;
(3) the PSI/SI packets of information of each channel is encapsulated in a TS packets of information successively.
The invention allows for a kind of digital television channel data method for fast searching, comprise the following steps:
A the channel data of each channel is encapsulated in a TS packets of information by ();
B () obtains dominant frequency point data according to the parameter-embedded configuration of the Set Top Box of Digital Television;
Step (b) dominant frequency point data comprises centre frequency, modulation system and symbol rate.
C () arranges tuner parameters according to dominant frequency point data, determine to broadcast frequency;
Step (c) tuner is single conversion architecture or two conversion architecture or low intermediate frequency structure.
D () arranges filter, receive TS packets of information;
In step (d), filter also can filter according to the PID in TS packets of information.
E () resolves TS packets of information, obtain each channel data, completing channel data search.
Set Top Box can adopt digital satellite set-top box, digital ground Set Top Box, cable television digital set-top box and IPTV set top box.
Beneficial effect of the present invention is: all program data information of a channel be encapsulated in a PSI/SI packets of information, eliminate redundant data, again the PSI/SI packets of information of different channel is encapsulated in a TS packets of information successively, be provided with a Packet Identifier, not removing only redundant data, and at the data message of all channels of quick obtaining in once search, the stand-by period of user can be saved.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of a kind of digital television channel data method for packing of the present invention;
Fig. 2 is the flow chart that a kind of digital television channel data of the present invention searches plain method fast;
Fig. 3 is the encapsulation schematic diagram of a kind of digital television channel data method for packing of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the present invention proposes a kind of digital television channel data method for packing, the method should be arranged before the product export of service provider of producer, comprises the following steps:
(1) frequency point data and the program data of each channel is obtained; Each channel is existing each satellite TV or cable channel, and the frequency point data of each channel is the frequency values that takies of channel for this reason, and program data is all programme information of this channel.Step (1) frequency point data and program data comprise the frequency information of channel, Program Association Table, network information table, Program Map Table, application information table, BAT bouquet association table and SDT Service Description Table; The English of Program Association Table is denoted as Program Association Table, is that the PSI of incidence relation between the description program number of definition in GB/T 17975.1 and PMT shows; PMT Program Map Table, Program Map Table, the PSI table of the PID of the description program components defined in GB/T17975.1 (be generally look, audio frequency); PID PacketIdentifier, Packet Identifier, for identifying GB/T 17975.1 transport stream packet (TS bag) of bearing association data; NIT Nerwork Information Table, network information table, the PSI table of the content such as description network intermediate-frequeney point parameter (centre frequency, modulation system, symbol rate), network name, network identifier of definition in GB/T 17975.1.SDT Service Description Table, SDT Service Description Table, the SI table of description type of service, title, service supplier etc. the information of definition in GB/T 28161; The English abbreviation of application information table is AIT, and the English of BAT bouquet association table is described as BAT.Program Association Table, network information table, Program Map Table, application information table, BAT bouquet association table and SDT Service Description Table are packaged into a PSI/SI packets of information.The number of network information table, application information table, BAT bouquet association table and SDT Service Description Table can be 0, and the number of Program Association Table and application information table is N, N is integer, and N is greater than 1; The number of Program Association Table and SDT Service Description Table is 1; Network information table and the number of BAT bouquet association table be no more than 1.In TS packets of information, first PSI/SI packets of information is only had to be provided with network information table and BAT bouquet association table.TS packets of information is provided with a PID.Transmit with a PID, can data redundancy be reduced, and the time of accelerating channel search.
(2) frequency point data of each channel and program data are packaged into a PSI/SI packets of information respectively; PSI/SI packets of information comprises the programme information of each channel;
In this step, defined by the frequency point data of each channel and the program data encapsulation process directory by table 1, this lead schedule is the exclusive define method that the present invention carries out defining.
| Grammer | Figure place | Memonic symbol |
| boot_channel_section(){ | ||
| table_id | 8 | uimsbf |
| section_syntax_indicator | 1 | bslbf |
| reserved_future_use | 1 | bslbf |
| reserved | 2 | bslbf |
| section_length | 12 | uimsbf |
| network_id | 16 | uimsbf |
| reserved | 2 | bslbf |
| version_number | 5 | uimsbf |
| current_next_indicator | 1 | bslbf |
| section_number | 8 | uimsbf |
| last_section_number | 8 | uimsbf |
| reserved_future_use | 8 | uimsbf |
| for(i＝0；i<N；i++){ | ||
| PSI_SI_section_data | ||
| } | ||
| CRC_32 | 32 | rpchof |
| } |
Directory (BOOT CHANNEL) be show with the mode organizational standard PSI/SI of privately owned definition section data, be encapsulated in the TS of same PID.The parsing of PSI/SI predicative method, descriptor is identical with standard P SI/SI.Table identifier (table_id) span of directory is 0x90 ~ 0xFE, is defaulted as 0x90.The section length of directory is 4KB to the maximum, altogether can have 256 section, the maximum PSI/SI information (usual data volume is within 40KB) that can describe 1MB.Wherein, uimsbf is unsigned integer, most significant bit first, signless integer, uimsbf unsigned integer most significant bit first.Bslbf is bit string, left bit first, Bit String, left bit first.Rpchof is remainder polynomial coefficients, highest orderfirst, Remainder polynomial coefficients, Highest Order First.
(3) the PSI/SI packets of information of each channel is encapsulated in a TS packets of information successively.Concrete packaged type can refer to shown in Fig. 3, the PSI/SI packets of information containing N number of frequency in a TS packets of information, and N is integer, and N is greater than 1; Different frequencies represents different channels, and different channels has at least one program, and the data acquisition pmt table of program is levied.
As shown in Figure 2, the invention allows for a kind of digital television channel data method for fast searching, the method has come based on digital television channel data method for packing, and this technology is called BCT (Boot
Channel Table) technology, be the distinctive technology of the present invention, can be applicable in each Set Top Box, without the need to changing the hardware facility of Set Top Box, only need arrange accordingly software, comprising the following steps:
A the channel data of each channel is encapsulated in a TS packets of information by (); B () obtains dominant frequency point data according to the parameter-embedded configuration of the Set Top Box of Digital Television; So-called dominant frequency point refers in the Polymera TS transport stream of Digital Television, for carrying the Frequency point of program management information (PSI/SI), it can be the arbitrary frequency determined by digital-TV operator, than if any operator select 363MHz, 307MHz or 427MHz etc. selects in some operators; Step (b) dominant frequency point data comprises centre frequency, modulation system and symbol rate.C () arranges tuner parameters according to dominant frequency point data, determine to broadcast frequency, broadcasts the Frequency point that frequency is carrying TS packets of information; Step (c) tuner is single conversion architecture or two conversion architecture or low intermediate frequency structure.Concrete, can adopt MAX2102 or the MAX2105 chip of MAXIM company, this is a kind of Direct Transform type tuner, is also the front stage circuits in Set Top Box, has the advantages that cost is low, circuit is simple and performance is good.D () arranges filter, receive TS packets of information; In step (d), filter also can filter according to the PID in TS packets of information.The channel that client can not subscribe to by filter, the channel of redundancy filter, concrete, this filter comprises a field programmable gate array, be embedded in multichannel input buffer module, a filtering module and the multiple-channel output buffer module of on-site programmable gate array internal, filtering module is set up an access to content memory interface, this access to content memory interface has been connected with an access to content memory module; Input buffer module is carried out synchronously the transport stream that each road inputs, and is stored in the push-up storage inputted in buffer module waits for follow-up process to be grouped into unit; Then, filtering module extracts the grouping of input from input buffer module, analyzes PID, then according to the filtering item determination filtering rule that access to content memory module returns, finally complete filtration, shunting and map process, and the grouping after process being write respectively each road output buffer module; Store filtering item in access to content memory module, according to the PID of input grouping, within a clock cycle, complete contrast, location and read, and returning filtering item immediately.Comprise the strategy filtering and shunt process in filtering item, comprise the information such as filtering and shunting outbound course, also comprise mapping policy in filtering item, the PID namely inputting grouping should be modified to object value when exporting.Export the grouping after stored filter process in buffer module, and wait for that follow-up each functional module is to be further processed.E () resolves TS packets of information, obtain each channel data, completing channel data search.Set Top Box can be divided into digital satellite set-top box, digital ground Set Top Box, cable television digital set-top box and IPTV set top box by major function.Can be divided into single-definition and high definition two kinds of ranks according to definition again, often kind of rank is divided into basic model, enhancement mode and high type three types according to business and function; Set Top Box can be divided into two funtion parts, channel demodulation decoded portion and source coding part.Tuner and channel decoding module are commonly referred to as system front end, and system front end determines the occasion that Set Top Box uses, and are used in ground, wired or satellite part decision all thus.Source coding module is commonly referred to as System Back-end, normally the source decoder of a single-chip, and it is integrated with a MPEG-2 decoder and a CPU.This part for various application scenario Set Top Box be all the same substantially, the selection of scheme determines class and the specification of product, in this way high definition type or SD etc. all thus part determine.Embedded type CPU is the heart of digital TV set-top box, and it and memory module are used for storing and operating software system, and control each hardware module.Interface circuit provides abundant external interface, comprises USB (universal serial bus) USB, Ethernet interface and RS232, simulation, digital video-audio interface, data-interface etc.Along with the development of chip technology, the function of Set Top Box is integrated in a master chip by increasing producer more, such as present most of manufacturer is all by CPU, decoder, demodulation multiplexer, graphic process unit and video-audio processor in the chips integrated, in master chip, first the flag information transmitted according to transport stream carries out demultiplexing to the transport stream received, then the descrambling information transmitted according to CA smart card carries out descrambling to program stream, TS stream after descrambling is delivered in video-audio decoder and is decoded to it respectively, be reduced into AV signal to export, simultaneously, also multiplexing sorts of systems tables of data in TS stream is isolated, feeding device top box processor exports respectively.The effect of tuning demodulator part is that the modulated digital signal demodulation transmitted is reduced into transport stream, the difference of tuning demodulator just constitutes different top box of digital machines, such as the satellite set top box (DVB-S) of QPSK demodulation, the wired digital set-top box (DVB-C) for QAM demodulation and the terrestrial transmission top box of digital machine (DVB-T) for OFDM demodulation.There are Thomson, Sharp etc. in the production firm of tuning demodulator popular in the market.MPEG-2 decoder completes the decompression to audio-video signal, converts, restore analog audio-video signal, simulated television shows high quality graphic, and provide multichannel sterego program through video encoder and audio frequency D/A.Middleware is the software platform of digital TV receiving system, for digital television application provides running environment and software interface.Middleware is as in top box of digital machine an independently software layer, application software and bottom hardware and operating system are kept apart, unified interface is defined to operating system and driver, application programs also defines unified interface simultaneously, also provides unified interface in addition to conventional numerical broadcast television service and value-added service.Middleware defines one group of comparatively complete and application programming interfaces of standard, makes application program independent of operating system and hardware platform, thus the exploitation of application is become simpler and more direct, make the opening of product and portability stronger.It is made up of Java Virtual Machine, web browser, image and multi-media module etc. usually, and application software and the driving layer software depending on hardware are separated by middleware, make application software not rely on concrete hardware platform.The present invention can carry out based on this part.
All program data information of a channel are encapsulated in a PSI/SI packets of information by the present invention, eliminate redundant data, again the PSI/SI packets of information of different channel is encapsulated in a TS packets of information successively, be provided with a Packet Identifier, not removing only redundant data, and at the data message of all channels of quick obtaining in once search, the stand-by period of user can be saved.
These are only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a digital television channel data method for packing, is characterized in that: comprise the following steps:
(1) frequency point data and the program data of each channel is obtained;
(2) frequency point data of each channel and program data are packaged into a PSI/SI packets of information respectively; Described PSI/SI packets of information comprises the programme information of each channel;
(3) the PSI/SI packets of information of each channel is encapsulated in a TS packets of information successively.
2. a kind of digital television channel data method for packing according to claim 1, is characterized in that: step (1) described frequency point data and program data comprise the frequency information of channel, Program Association Table, network information table, Program Map Table, application information table, BAT bouquet association table and SDT Service Description Table; Described Program Association Table, network information table, Program Map Table, application information table, BAT bouquet association table and SDT Service Description Table are packaged into a PSI/SI packets of information.
3. a kind of digital television channel data method for packing according to claim 2, it is characterized in that: the number of described network information table, application information table, BAT bouquet association table and SDT Service Description Table can be 0, described Program Association Table and the number of application information table are N, N is integer, and N is greater than 1; Described Program Association Table and the number of SDT Service Description Table are 1; Described network information table and the number of BAT bouquet association table are no more than 1.
4. a kind of digital television channel data method for packing according to claim 1 and 2, is characterized in that: in described TS packets of information, only has first PSI/SI packets of information to be provided with network information table and BAT bouquet association table.
5. a kind of digital television channel data method for packing according to claim 1 or 4, is characterized in that: described TS packets of information is provided with a PID.
6. a digital television channel data method for fast searching, is characterized in that: comprise the following steps:
A the channel data of each channel is encapsulated in a TS packets of information by ();
B () obtains dominant frequency point data according to the parameter-embedded configuration of the Set Top Box of Digital Television;
C () arranges tuner parameters according to dominant frequency point data, determine to broadcast frequency;
D () arranges filter, receive TS packets of information;
E () resolves TS packets of information, obtain each channel data, completing channel data search.
7. a kind of digital television channel data method for fast searching according to claim 6, is characterized in that: the described dominant frequency point data of step (b) comprises centre frequency, modulation system and symbol rate.
8. a kind of digital television channel data method for fast searching according to claim 6, is characterized in that: the described tuner of step (c) is single conversion architecture or two conversion architecture or low intermediate frequency structure.
9. a kind of digital television channel data method for fast searching according to claim 6, is characterized in that: in step (d), and described filter also can filter according to the PID in TS packets of information.
10. a kind of digital television channel data method for fast searching according to claim 6, is characterized in that: described Set Top Box can adopt digital satellite set-top box, digital ground Set Top Box, cable television digital set-top box and IPTV set top box.
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| CN108282692A (en) * | 2018-02-08 | 2018-07-13 | 深圳创维数字技术有限公司 | A kind of method, apparatus of set-top box quick search program, set-top box and medium |
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