CN104936006B - A kind of sending method of program information table, apparatus and system - Google Patents
A kind of sending method of program information table, apparatus and system Download PDFInfo
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- CN104936006B CN104936006B CN201510292397.0A CN201510292397A CN104936006B CN 104936006 B CN104936006 B CN 104936006B CN 201510292397 A CN201510292397 A CN 201510292397A CN 104936006 B CN104936006 B CN 104936006B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26283—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for associating distribution time parameters to content, e.g. to generate electronic program guide data
-
- 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
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
Abstract
The present invention provides a kind of sending method of program information table, apparatus and system, and this method includes：For each program information table to be sent, FPGA is received and is cached the content and attribute information of the program information table to be sent of CPU transmissions, program information table to be sent is Program Specific Information PSI table or business information SI tables, and attribute information delivers interval including transmission program information table to be sent；By the memory outside the content write-in FPGA of the program information table to be sent of caching；Determine that FPGA occurs Interruption and reaches when delivering interval of program information table to be sent, it is determined that meeting transmission condition, and the content of program information table to be sent is extracted from the memory, and rear end equipment will be sent to after the content and audio frequency and video multiplexing.The present invention takes full advantage of FPGA high-speed parallel disposal ability, saves cpu resource occupancy, effectively reduces the time delay for sending program information table.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of sending method of program information table, apparatus and system.
Background technology
With the popularization of DTV, digital television business tends to abundantization and variation.Sent out in the market demand and technology
Under the promotion of exhibition, traditional unidirectional passive television services pattern is gradually substituted by two-way interactive digital television business.
Video on-demand system is set up by using broadcasting and TV front end delivery equipment, carries out video request program (VOD, Video On Demand) industry
Business, user can more easily watch video frequency program.
In the VOD VOD systems of two-way interactive, in order to transport stream (TS, the Transport to multiplexed program
Stream contained various information are identified, it is necessary to which search obtains programme information, the programme information bag from input TS in)
Include：Program Specific Information (PSI, Program Specific Information), and/or, business information (SI, Service
Information).Dissection process is carried out to programme information, then is reinserted into the programme information after processing by certain ratio
In Polymera stream after multiplexing, set top box can correctly lock according to program information content and be correctly decoded broadcasting program.Its
In, PSI is defined by Moving Picture Experts Group-2, and it provides how many program, the composition of program and correlation in a transport stream
Etc. information, so that set top box correctly can carry out parsing multiplexing to transport stream.SI by DVB (DVB,
Digital Video Broadcasting) standard definition is the extension to PSI, it is useful to user to add some in SI
Information, such as：The type of program, service provider, the information such as correlation of program.
In VOD VOD systems, the program information table in a TS may have it is multiple, it is existing in the plurality of program information table
PSI table also has SI tables, the relevant information of each one program of program information table corresponding record.At present, for each programme information
Table, the sending method of the program information table in existing VOD VOD systems in TS as shown in figure 1, including：
Step 101, the CPU of broadcasting and TV front end delivery equipment extracts program information table from TS streams and preserves the program letter of extraction
Cease the content of table.
Step 102, whether detection CPU Interruption produces in real time, if performing step 103, otherwise interval setting
Time continues executing with step 102.
Wherein, due to delivering interval typically using millisecond as minimum time unit, Interruption can be arranged to herein
1ms。
Step 103, the count value of the program information table is added 1, and judges whether the program information table reaches the hair of the table
Table interval, if it is, performing step 104, otherwise perform step 102.
Specifically, corresponding one of each program information table delivers interval, such as, programme information Table A deliver at intervals of
100ms.When the count value of programme information Table A is 100, illustrate that the interval of delivering of the table is reached, it is necessary to send the programme information
Table A.
Step 104, the program information table is write in FPGA and cached, then be multiplexed the program information table and TS streams by FPGA
After be sent to set top box.
However, with the development that deepens continuously of interactive digital television business in recent years, the continuous expansion of user group, to wide
The density requirements of electric front end delivery equipment request program are also constantly improving, and concurrent transmission stream to be dealt with is also therewith at double
Increase, the quantity of the corresponding program information table to be sent is also in increase at double.In this case, if still adopted
With the mode of above-mentioned transmission program information table, can cause to bring problems with：Due to the quantity for the program information table that needs are sent
It is huge, it is necessary to judge whether program information table reaches the increase corresponding herein for sending interval, each program reaches every time when delivering
Carve, CPU is required for corresponding program information table being written to buffer in FPGA, is sent using being lined up to be lined up one by one, causes CPU
Resources occupation rate is higher, the problem of wasting substantial amounts of cpu resource, while considerably increases the forward delay interval of program information table.
The content of the invention
The present invention provides a kind of sending method of program information table, apparatus and system, of the prior art to solve
The cpu resource occupancy sent caused by the mode of program information table is higher, the problem of wasting substantial amounts of cpu resource, while greatly
The big forward delay interval for adding program information table.
A kind of sending method of program information table, including：
For each program information table to be sent, on-site programmable gate array FPGA receives and caches central processor CPU
The content of the program information table to be sent and the attribute information of the program information table to be sent sent, it is described to be sent
Program information table is Program Specific Information PSI table or business information SI tables, and the attribute information includes sending the section to be sent
Mesh information table delivers interval；
The memory that the content of the program information table to be sent of caching is write outside the FPGA；
Determine that the FPGA occurs Interruption and reaches when delivering interval of the program information table to be sent, it is determined that full
Foot sends condition, and the content of the program information table to be sent is extracted from the memory, and the content is answered with audio frequency and video
Rear end equipment is sent to after.
In methods described, the attribute information also includes the starting point for storing the content of the program information table to be sent
Location, the then memory write the content of the program information table to be sent of the caching outside the FPGA, is specifically included：
, will be described slow since the start address of the content of program information table to be sent when determining the memory free time
The memory that the content for the program information table to be sent deposited is write outside the FPGA in the form of transport stream TS bag.
The present invention implements the external memory storage for program information table to be saved in FPGA, so as to save CPU resource.
Methods described, in addition to：
The multi-frame table that the CPU is sent is received, the multi-frame table is used to record packet identifier PID identicals in same program
Program information table；
It is determined that meeting transmission condition, specifically include：
Determine that the program information table to be sent and the program information table being currently transmitted belong to the same multi-frame
During table, it is determined that when the program information table being currently transmitted is sent, it is determined that meeting transmission condition；
Determine the program information table to be sent and the program information table being currently transmitted be not belonging to it is same described multiple
During frame table, it is determined that meeting transmission condition；
When determining that the program information table to be sent is not belonging to any multi-frame table, it is determined that meeting transmission condition.
The embodiment of the present invention can avoid occurring intersecting between the program information table with identical PID in same program sending,
Cause rear end equipment can not normal play program the problem of.
In methods described, the content of the program information table to be sent is extracted from the memory, is specifically included：
The transmission instruction of the program information table to be sent is generated, and delivering for the instruction deposit FPGA is sent by described
It is described to send the attribute information that the program information table to be sent is carried in instruction in queue；
It is determined that when reaching the transmission order of the program information table to be sent, the transmission is extracted in queue from described deliver
Instruction；
According to the initial address of the storage program information table to be sent for sending and being carried in instruction, from the storage
Extract TS bags corresponding to the program information table to be sent in device one by one, and will the TS bags be sent to after audio frequency and video multiplexing after
End equipment.
The embodiment of the present invention has multiple program information tables to need in the case of sending in a short time, can ensure to send out in order
Send program information table.
The present invention also provides a kind of sending method of program information table, including：
For each transport stream TS, program information table is extracted from the TS and is parsed, the program information table is program
Customizing messages PSI table or business information SI tables；
According to the related protocol of video request program, the program information table after parsing is accordingly changed, obtains first
Program information table；
The content of first program information table and attribute information are sent to on-site programmable gate array FPGA, so that
The content of first program information table is sent to rear end equipment by the FPGA.
In methods described, the attribute information includes the transmission state of first program information table, by the first segment
After the content and attribute information of mesh information table are sent to on-site programmable gate array FPGA, it is determined that to first programme information
When the content and/or attribute information of table are updated, the transmission state of first program information table is arranged to suspend, and will
The halted state is sent to the FPGA, so that the transmission state of first program information table is changed to temporarily by the FPGA
Stop；
It is determined that when the renewal of the content and/or attribute information to first program information table is completed, by the first segment
The transmission state of mesh information table is arranged to start, and the content of first program information table after renewal and/or attribute are believed
Breath is sent to the FPGA.
The situation that the embodiment of the present invention can avoid FPGA and CPU while handle same program information table occurs.
Methods described, the program information table after parsing is accordingly changed, specifically included：
For the program information table of multiple programs with identical original packet identifier PID, respectively to the section of each program
The original PID of mesh information table modifies；
For amended PID identicals program information table in same program, by amended PID identicals programme information
Table is recorded in same multi-frame table, and the multi-frame table is sent into the FPGA.
CPU of the embodiment of the present invention modifies to the raw information of program information table, to meet video request program related protocol
Regulation.
The present invention provides a kind of dispensing device of program information table, and described device is directed to each program information table to be sent,
Including：
Receiving unit, for receive and cache central processor CPU transmission the mesh information table to be sent content with
And the attribute information of the program information table to be sent, the program information table to be sent are Program Specific Information PSI table or industry
Business information SI tables, the attribute information deliver interval including the transmission program information table to be sent；
Writing unit, for the memory outside the content write-in described device by the program information table to be sent of caching；
Transmitting element, for determining described device generation Interruption and reaching delivering for the program information table to be sent
During interval, it is determined that meeting transmission condition, and the content of the program information table to be sent is extracted from the memory, and this is interior
Hold with being sent to rear end equipment after audio frequency and video multiplexing.
In described device, said write unit is specifically used for：The attribute information also includes storing the program to be sent
The initial address of the content of information table, and when determining the memory free time, since the content of program information table to be sent
Address starts, and the content of the program information table to be sent of the caching is write outside described device in the form of transport stream TS bag
Memory.
In described device, the receiving unit is additionally operable to：
The multi-frame table that the CPU is sent is received, the multi-frame table is used to record packet identifier PID identicals in same program
Program information table；
When the transmitting element determines to meet transmission condition, it is specifically used for：
Determine that the program information table to be sent and the program information table being currently transmitted belong to the same multi-frame
During table, it is determined that when the program information table being currently transmitted is sent, it is determined that meeting transmission condition；
Determine the program information table to be sent and the program information table being currently transmitted be not belonging to it is same described multiple
During frame table, it is determined that meeting transmission condition；
When determining that the program information table to be sent is not belonging to any multi-frame table, it is determined that meeting transmission condition.
In described device, when the transmitting element extracts the content of the program information table to be sent from the memory,
It is specifically used for：
The transmission instruction of the program information table to be sent is generated, and delivering for instruction deposit described device is sent by described
It is described to send the attribute information that the program information table to be sent is carried in instruction in queue；
It is determined that when reaching the transmission order of the program information table to be sent, the transmission is extracted in queue from described deliver
Instruction；
According to the initial address of the storage program information table to be sent for sending and being carried in instruction, from the storage
Extract TS bags corresponding to the program information table to be sent in device one by one, and will the TS bags be sent to after audio frequency and video multiplexing after
End equipment.
The present invention also provides a kind of dispensing device of program information table, and described device is directed to each transport stream TS, including：
Extraction unit, for extracting program information table from the TS and parsing, the program information table is that program is specific
Information PSI table or business information SI tables；
Unit is changed, for the related protocol according to video request program, the program information table after parsing is carried out corresponding
Modification, obtains the first program information table；
Transmitting element, for the content of first program information table and attribute information to be sent into field programmable gate
Array FPGA, so that the content of first program information table is sent to rear end equipment by the FPGA.
Described device, in addition to：Updating block, the transmission of first program information table is included for the attribute information
During state, after the content of first program information table and attribute information are sent into on-site programmable gate array FPGA, really
When fixed content and/or attribute information to first program information table is updated, by the hair of first program information table
Send state to be arranged to suspend, and the halted state is sent to the FPGA, so that the FPGA is by first programme information
The transmission state of table is changed to suspend；
It is determined that when the renewal of the content and/or attribute information to first program information table is completed, by the first segment
The transmission state of mesh information table is arranged to start, and the content of first program information table after renewal and/or attribute are believed
Breath is sent to the FPGA.
In described device, the modification unit is specifically used for：
For the program information table of multiple programs with identical original packet identifier PID, respectively to the section of each program
The original PID of mesh information table modifies；
For amended PID identicals program information table in same program, by amended PID identicals programme information
Table is recorded in same multi-frame table, and the multi-frame table is sent into the FPGA.
The present invention also provides a kind of transmission system of program information table, including：
Central processor CPU, for for each transport stream TS, program information table being extracted from the TS and is parsed, institute
It is Program Specific Information PSI table or business information SI tables to state program information table；According to the related protocol of video request program, after parsing
The program information table accordingly changed, obtain the first program information table；By the content of first program information table with
And attribute information is sent to on-site programmable gate array FPGA；
On-site programmable gate array FPGA, for receiving and caching first program letter of central processor CPU transmission
The content of table and the attribute information of the program information table to be sent are ceased, for each first program information table, by described the
For one program information table as program information table to be sent, the attribute information includes the hair for sending the program information table to be sent
Table interval；The memory that the content of the program information table to be sent of the caching is write outside the FPGA；It is it is determined that described
FPGA occurs Interruption and reaches when delivering interval of the program information table to be sent, it is determined that meet transmission condition, and from
The memory extracts the content of the program information table to be sent, and is sent to rear end after the content is multiplexed with audio frequency and video and sets
It is standby；
Memory, for storing the content of the program information table to be sent.
Using the sending method of program information table provided by the invention, apparatus and system, have the advantages that：By
FPGA completes the operation of the transmission of program information table, takes full advantage of FPGA high-speed parallel disposal ability, saves cpu resource
Occupancy；Further, since FPGA is only responsible for sending the work of program information table, other work are will not relate to, so as to effectively reduce
Send the time delay of program information table.
Brief description of the drawings
Fig. 1 is the sending method flow chart for the program information table that prior art provides；
Fig. 2 is the sending method flow chart of the program information table of FPGA sides provided in an embodiment of the present invention；
Fig. 3 is that the determination of FPGA sides provided in an embodiment of the present invention meets the mode flow chart of transmission condition；
Fig. 4 is that another determination of FPGA sides provided in an embodiment of the present invention meets the mode flow chart of transmission condition；
Fig. 5 is the side of the content that program information table to be sent is extracted from memory of FPGA sides provided in an embodiment of the present invention
Formula flow chart；
Fig. 6 is the sending method flow chart of the program information table of CPU side provided in an embodiment of the present invention；
Fig. 7 is the dispensing device schematic diagram of the program information table of FPGA sides provided in an embodiment of the present invention；
Fig. 8 is the dispensing device schematic diagram of the program information table of CPU side provided in an embodiment of the present invention；
Fig. 9 is the transmission system schematic of program information table provided in an embodiment of the present invention.
Embodiment
The sending method to program information table provided by the invention, apparatus and system are carried out with reference to the accompanying drawings and examples
It is described in more detail.
The embodiment of the present invention provides a kind of sending method of program information table, as shown in Fig. 2 including：
Step 201, the programme information to be sent that CPU is sent is received for each program information table to be sent, FPGA
The attribute information of the content of table and the program information table to be sent, the attribute information include sending the program to be sent
Information table delivers interval.
Wherein, the program information table is PSI table or SI tables, and the program information table to be sent is the program that CPU is sent
Information table, that is, the first program information table that the CPU being mentioned below is sent, specifically, FPGA receives the first program of CPU transmissions
After information table, using first program information table as program information table to be sent.Program information table (the first programme information to be sent
Table) accordingly changed according to the related protocol of video request program (VOD) by the CPU, program to be sent described in concrete modification
Original packet identifier PID in the content of information table.Specifically, program information table to be sent has its attribute information, the attribute
Information includes：Table size (program information table to be sent needs to be packaged into how many individual TS bags), table type, table send state, delivered
Interval etc., attribute information can also include：Store the initial address of program information table to be sent, continuous counter number, purpose frequency
Etc. information.Wherein, table type includes：PAT (Program Association Table, Program Association Table), PMT (Program
Mapping Table, Program Map Table), BAT (Bonquet Association Table, BAT bouquet association table), SDT
(Service Description Table, server describe table) etc., FPGA is Field-Programmable Gate
Array, field programmable gate array, CPU are Central Processing Unit, central processing unit.
The transmission program information table to be sent delivers interval, i.e. every the first setting time, sends once described treats
Send program information table.
Step 202, the memory that FPGA writes the content of the program information table to be sent of caching outside the FPGA.
Specifically, when FPGA receives the program information table content to be sent of CPU transmissions, FPGA buffering is first cached to
Area, when determining the memory free time outside FPGA, by the memory outside the content write-in FPGA of program information table to be sent.Its
In, the attribute information of the program information table to be sent of caching can be saved in FPGA internal storage.
Step 203, determine that what the FPGA occurred Interruption and reached the program information table to be sent delivers interval
When, it is determined that meet transmission condition, and extract from the memory content of the program information table to be sent, and by the content with
Rear end equipment is sent to after audio frequency and video multiplexing.
Specifically, the setting time of FPGA intervals second will be produced and once interrupted, i.e., Interruption, the first setting time are big
In the second setting time, typically, the second setting time is 1ms, i.e. FPGA is produced every 1ms and once interrupted.Due to each pending
Corresponding one of program information table is sent to deliver interval, when FPGA produces Interruption, and the number and second of the Interruption accumulated
When the product of setting time is more than or equal to the first setting time, illustrate to reach program information table to be sent delivers interval,
Now determine to meet transmission condition；It is determined that when meeting transmission condition, then the program to be sent is extracted from FPGA external memory storage
The content of information table, and rear end equipment is sent to after being multiplexed with audio frequency and video, further, the rear end equipment is set top box.
The embodiment of the present invention, CPU are only responsible for sending the content of the program information table to be sent of acquisition and attribute information
To FPGA, it is not necessary to monitor whether the condition for meeting to send the content of program information table in real time, it is not required that storage programme information
The content of table, the operation of the transmission of program information table is completed by FPGA, saves cpu resource occupancy.
In addition, the mode of the transmission program information table of prior art, in the more program information table of quantity forwarded, each
Program information table needs a corresponding CPU task, due to CPU except the task of execution transmission program information table will also perform it
Its task, and there is the difference of priority between each task, it may be less than by sending the priority of the task of program information table
The high task of its priority, so as to cause to send the delay of programme information, usual time delay is 30ms, the embodiment of the present invention by
FPGA monitors whether program information table to be sent meets transmission condition in real time, and is sent when it is determined that meeting transmission condition, fully
FPGA high-speed parallel disposal ability is make use of, because FPGA is only responsible for sending the work of program information table, will not relate to other
Work, so as to effectively reduce the time delay for sending program information table.
Preferably, the attribute information also includes the initial address for storing the content of the program information table to be sent, then
In step 202, the memory outside the content write-in FPGA of the program information table to be sent of caching specifically includes：Really
During the fixed memory free time, since being stored the initial address of content of the program information table to be sent, by the caching
Program information table to be sent the memory that is write in the form of transport stream TS bag outside the FPGA of content.Wherein, according to
It is corresponding that the length of section corresponding to content in program information table and the maximum length of each TS bags calculate each program information table
TS bags number, less than TS bag maximum length when, be packaged into a TS bag, a program information table at least corresponding one
Individual TS bags.Memory outside the FPGA is DDR (Double Data Rate, Double Data Rate synchronous DRAM)
Or DDR2 (Double Data Rate 2, second generation Double Data Rate synchronous DRAM), or, outside the FPGA
Memory be DDR3 (Double Data Rate 3, third generation Double Data Rate synchronous DRAM), now store
The initial address of the program information table to be sent is that the offset address of the program information table to be sent is stored in DDR3.
Specifically, in step 203, determine that the FPGA occurs Interruption and reaches the program information table to be sent
When delivering interval, it is determined that meeting transmission condition, specific implementation process is as follows, as shown in figure 3, specifically including：
Step 301, judge whether FPGA produces Interruption, if it is, performing step 302, otherwise, continue executing with step
301。
Specifically, FPGA itself produces Interruption, i.e. the second setting time of interval, which produces, once interrupts, it is preferable that the
Two setting times are 1ms.
Step 302, judge whether to reach program information table to be sent delivers interval, if it is, step 303 is performed, it is no
Then, step 304 is performed.
Specifically, each program information table to be sent received for FPGA, one is set for the program information table to be sent
The counter that individual initial value is zero, above-mentioned first setting time divided by the second setting time are obtained into result N, and (benefit less than 1 is
1), FPGA often produces an Interruption, and the value of the counter adds 1, when the value of the counter is equal to N, it is determined that meeting to send
Condition.
Specifically, each program information table to be sent received for FPGA, one is set for the program information table to be sent
Individual counter, the initial value of the counter are the result N (deficiencies for obtaining above-mentioned first setting time divided by the second setting time
1 benefit is 1), FPGA often produces an Interruption, and the value of the counter subtracts 1, when the value of the counter is zero, it is determined that full
Foot sends condition.
After determining that program information table to be sent is sent to rear end equipment, by the corresponding counting of the program information table to be sent
The value of device resets to initial value, and continue waiting for whether reaching the program information table to be sent delivers interval, it is determined that reaching hair
Behind table interval, continue to send the program information table to be sent.
Step 303, it is determined that meeting transmission condition, that is, determine that the FPGA occurs Interruption and reaches the section to be sent
Mesh information table delivers interval.
Step 304, it is determined that being unsatisfactory for transmission condition and performing step 301.
Specifically, when being unsatisfactory for transmission condition, the generation interrupted next time is continued waiting for.
This preferred embodiment, using FPGA fast throughput, when FPGA determines to reach program information table to be sent
When delivering interval, program information table to be sent can be sent faster, efficiency is delivered so as to improve, reduces and deliver time delay.
Specifically, in step 201, program information table to be sent is entered by the CPU according to the related protocol of video request program
The corresponding modification of row, CPU is after original program information table is obtained, original PID, program corresponding to the program information table of different programs
Number etc. information be probably identical, according to VOD related protocols, CPU needs to be revised as these information of these program information tables
Different PID, program number etc., specific original PID are carried in original program information table content.But to program information table
Carry out after accordingly changing, the PID of the program information table of same program is probably identical.Due to when sending program information table,
The program information table with identical PID can not intersect transmission in same program, and now, CPU is identical by PID in same program
Program information table be recorded in a multi-frame table and be sent to FPGA so that FPGA is when sending program information table to be sent, energy
Enough avoid intersecting the problem of sending, it is preferred that the sending method of program information table provided in an embodiment of the present invention, is also wrapped
Include：The multi-frame table that the CPU is sent is received, the multi-frame table is used to record PID identicals program information table in same program.Base
In the preferred embodiment, it is determined that meeting transmission condition, as shown in figure 4, specifically including：
Step 401, determine that what the FPGA occurred Interruption and reached the program information table to be sent delivers interval
When, judge whether the program information table to be sent belongs to any multi-frame table of FPGA receptions, if it is, step 403 is performed, it is no
Then, step 402 is performed.
Step 402, it is determined that meeting transmission condition.
Step 403, judge whether the program information table to be sent and the program information table being currently transmitted belong to
Same multi-frame table, if it is, performing step 404, otherwise, perform step 402.
Step 404, it is determined that when the program information table being currently transmitted is sent, step 402 is performed.
Specifically, FPGA is when sending program information table, transmission be program information table content.
It can avoid producing to intersect between identical PID program information table in same program using the embodiment of the present invention sending institute
Caused rear end equipment parses the problem of wrong.
Preferably, after it is determined that meeting transmission condition, extracted from the memory in the program information table to be sent
Hold, as shown in figure 5, specifically including：
Step 501, the transmission instruction of the program information table to be sent is generated, and is sent described described in instruction deposit
FPGA's delivers in queue, described to send the attribute information that the program information table to be sent is carried in instruction.
Specifically, the program information table for being unsatisfactory for transmission condition, will not generate the transmission instruction of the program information table.
Wherein, send and the attribute information of the program information table to be sent is carried in instruction including storing the program information table to be sent
Initial address, may also include continuous counter number, purpose frequency point number etc..
Step 502, it is determined that when reaching the transmission order of the program information table to be sent, extracted from described deliver in queue
It is described to send instruction.
Specifically, according to the first-in first-out rule of queue, judge whether to reach the transmission of the program information table to be sent
Sequentially.
Step 503, the initial address of the storage program information table to be sent carried in being instructed according to the transmission, from
TS bags corresponding to the program information table to be sent are extracted in the memory one by one, and by after the TS bags and audio frequency and video multiplexing
It is sent to rear end equipment.
Specifically, after determining the current TS bags extraction extracted, next TS bags are extracted.FPGA is pending in transmission
It is the transmission program information table in the form of TS bags, when last corresponding to program information table to be sent when sending program information table
After one TS coating is sent to rear end equipment, determine that the program information table to be sent is sent completely.
Specifically, FPGA is preserved in the form of TS bags when preserving each program information table, a programme information
Table at least corresponds to a TS bag, and FPGA is when sending program information table to be sent, and the transmission in the form of TS bags.For right
The program information table to be sent of multiple TS bags is answered, when when delivering interval, FPGA treats for this to the program information table to be sent
Send first TS bags generation, one transmission instruction corresponding to program information table and be stored in and deliver to arranging, when interval the 3rd is set
Between, generate a transmission instruction for second TS bag and be stored in and deliver to row, sent until being generated for last TS bag
Instruct and be stored in and deliver queue, wherein in arrival TS bag transmission order, but do not reach for the life of next TS bags
When at the time of instruction into transmission, first TS bag is extracted from the memory outside FPGA according to the transmission instruction of a upper TS bag
And with being sent to rear end equipment after being multiplexed depending on audio frequency and video, i.e., when reaching some TS bag transmission order, it is not necessary to after considering other
Whether the transmission instruction of continuous TS bags has been written into queue to be delivered.Preferably, the 3rd setting time far smaller than delivers interval,
3rd setting time ranges preferably from 1ms~5ms.
Based on above-described embodiment, it is preferable that by described in the attribute information write-in of the program information table to be sent of the caching
In the attribute list corresponding with the program information table to be sent prestored inside FPGA.
Above-mentioned each inventive embodiments are that the sending method of the program information table provided in implementing in FPGA sides to the present invention is entered
Capable explanation, the sending method of program information table provided in an embodiment of the present invention is illustrated in CPU side below, such as Fig. 6 institutes
Show, including：
Step 601, for each transport stream TS, program information table is extracted from the TS and is parsed.
Specifically, CPU extracts program information table from transport stream, the program information table of extraction is specially PSI table or SI tables.
Step 602, according to the related protocol of video request program, the program information table after parsing is accordingly changed, obtained
First program information table.
Wherein, it is specially to original in the content of program information table corresponding modification to be carried out to the program information table after parsing
PID is accordingly changed, so that the PID of the program information table between different programs is different.But for each of same program
The amended PID of program information table may be still identical.
In addition it is also necessary to the other information of program information table, for example, the information such as program number described in program information table, tool
Result after the information and concrete modification of body modification is prior art, here not depending on the agreement of video on-demand system
Repeat.
Specifically, the first program information table is program information table to be sent above, CPU sends the first program information table
After FPGA, FPGA using the first program information table received as program information table to be sent and cache receive it is to be sent
The content and attribute information of program information table.
Step 603, the content of first program information table and attribute information are sent to field programmable gate array
FPGA, so that the content of first program information table is sent to rear end equipment by the FPGA.
The embodiment of the present invention, CPU are only responsible for extracting program information table from TS and are sent to FPGA, it is not necessary to CPU
Preserve, judge whether that reaching delivering for program information table is spaced and program information table is sent into set top box, so as to save
Cpu resource.
Based on embodiment illustrated in fig. 6, the attribute information includes the transmission state of first program information table, by described in
After the content and attribute information of first program information table are sent to on-site programmable gate array FPGA, CPU is determined to described the
When the content and/or attribute information of one program information table are updated, the transmission state of first program information table is set
For pause, and the halted state is sent to the FPGA, so that the FPGA is by the transmission shape of first program information table
State is changed to suspend；
It is determined that when the renewal of the content and/or attribute information to first program information table is completed, by the first segment
The transmission state of mesh information table is arranged to start, and the content of first program information table after renewal and/or attribute are believed
Breath is sent to the FPGA.
Specifically, if the content of the first program information table and attribute information are sent to after FPGA, it is necessary to change by CPU
When the content and/or attribute information of program information table, then need the state of delivering of the first program information table being arranged to temporary
Stop, after to be modified, the state of delivering of the first program information table is arranged to start, and by first program after renewal
The content and/or attribute information of information table are sent to the FPGA.So as to prevent CPU and FPGA while operate same program letter
Caused by breath table the problem of delivering mistake.
Preferably, the program information table after parsing is accordingly changed, specifically included：
For the program information table of multiple programs with identical original packet identifier PID, respectively to the section of each program
The original PID of mesh information table modifies；
For amended PID identicals program information table in same program, by amended PID identicals programme information
Table is recorded in same multi-frame table, and the multi-frame table is sent into the PFGA.
Specifically, original PID is carried in the content of program information table, the programme information for multiple programs that CPU is received
In table, the original PID of multiple programs may be identical, and the original PID of the program information table in multiple programs may be also identical, this
When, it is necessary to according to the related protocol of video on-demand system, identical original PID corresponding to each program is revised as different PID,
So as to distinguish different programs.After changing PID, the PID of each program information table in same program is possible or identical, this
When, the program information table for having identical PID in same program is recorded in same multi-frame table, and FPGA is sent to, so that
FPGA is judged, prevents between the program information table with identical PID being intersected in same program, so as to cause rear end to set
It is standby normally to parse programme information, can not normal play program the problem of.
The same inventive concept of sending method based on the program information table with above-mentioned FPGA sides, the embodiment of the present invention also carry
For a kind of dispensing device of program information table, as shown in fig. 7, described device is directed to each program information table to be sent, including：
Receiving unit 701, the content of the mesh information table to be sent for receiving and caching central processor CPU transmission
And the attribute information of the program information table to be sent, the program information table to be sent be Program Specific Information PSI table or
Business information SI tables, the attribute information deliver interval including the transmission program information table to be sent；
Writing unit 702, for the storage outside the content write-in described device by the program information table to be sent of caching
Device；
Transmitting element 703, for determining described device generation Interruption and reaching the program information table to be sent
When delivering interval, it is determined that meeting transmission condition, and the content of the program information table to be sent is extracted from the memory, and will
The content after audio frequency and video multiplexing with being sent to rear end equipment.
Preferably, in described device, said write unit is specifically used for：It is described pending that the attribute information also includes storage
When sending the initial address of the content of program information table, and determining the memory free time, from the content of program information table to be sent
Start address start, the content of the program information table to be sent of the caching is write into the dress in the form of transport stream TS bag
Put the memory of outside.
Preferably, in described device, the receiving unit is additionally operable to：
The multi-frame table that the CPU is sent is received, the multi-frame table is used to record packet identifier PID identicals in same program
Program information table；
When the transmitting element determines to meet transmission condition, it is specifically used for：
Determine that the program information table to be sent and the program information table being currently transmitted belong to the same multi-frame
During table, it is determined that when the program information table being currently transmitted is sent, it is determined that meeting transmission condition；
Determine the program information table to be sent and the program information table being currently transmitted be not belonging to it is same described multiple
During frame table, it is determined that meeting transmission condition；
When determining that the program information table to be sent is not belonging to any multi-frame table, it is determined that meeting transmission condition.
Preferably, in described device, the transmitting element extracts the program information table to be sent from the memory
During content, it is specifically used for：
The transmission instruction of the program information table to be sent is generated, and delivering for instruction deposit described device is sent by described
It is described to send the attribute information that the program information table to be sent is carried in instruction in queue；
It is determined that when reaching the transmission order of the program information table to be sent, the transmission is extracted in queue from described deliver
Instruction；
According to the initial address of the storage program information table to be sent for sending and being carried in instruction, from the storage
Extract TS bags corresponding to the program information table to be sent in device one by one, and will the TS bags be sent to after audio frequency and video multiplexing after
End equipment.
The same inventive concept of sending method based on the program information table with above-mentioned CPU side, the present invention also provide a kind of
The dispensing device of program information table, as shown in figure 8, described device is directed to each transport stream TS, including：
Extraction unit 801, for extracting program information table from the TS and parsing, the program information table is that program is special
Determine information PSI table or business information SI tables；
Unit 802 is changed, for the related protocol according to video request program, phase is carried out to the program information table after parsing
It should change, obtain the first program information table；
Transmitting element 803, it can be compiled for the content of first program information table and attribute information to be sent into scene
Journey gate array FPGA, so that the content of first program information table is sent to rear end equipment by the FPGA.
Preferably, described device, in addition to：Updating block 804, believe for the attribute information including first program
When ceasing the transmission state of table, the content of first program information table and attribute information are sent to field programmable gate array
After FPGA, it is determined that when the content and/or attribute information to first program information table are updated, first program is believed
The transmission state of breath table is arranged to suspend, and the halted state is sent into the FPGA, so that the FPGA is by described first
The transmission state of program information table is changed to suspend；
It is determined that when the renewal of the content and/or attribute information to first program information table is completed, by the first segment
The transmission state of mesh information table is arranged to start, and the content of first program information table after renewal and/or attribute are believed
Breath is sent to the FPGA.
Preferably, in described device, the modification unit is specifically used for：
For the program information table of multiple programs with identical original packet identifier PID, respectively to the section of each program
The original PID of mesh information table modifies；
For amended PID identicals program information table in same program, by amended PID identicals programme information
Table is recorded in same multi-frame table, and the multi-frame table is sent into the FPGA.
Based on the inventive concept same with the sending method of above-mentioned FPGA sides and the program information table of CPU side, the present invention is also
A kind of transmission system of program information table is provided, as shown in figure 9, including：
Central processor CPU 901, for for each transport stream TS, extracting program information table from the TS and parsing,
The program information table is Program Specific Information PSI table or business information SI tables；According to the related protocol of video request program, to parsing
The program information table afterwards is accordingly changed, and obtains the first program information table；By the content of first program information table
And attribute information is sent to on-site programmable gate array FPGA；
On-site programmable gate array FPGA 902, for receiving and caching first program of central processor CPU transmission
The attribute information of the content of information table and the program information table to be sent, for each first program information table, by described in
As program information table to be sent, the attribute information includes sending the program information table to be sent first program information table
Deliver interval；The memory that the content of the program information table to be sent of the caching is write outside the FPGA；It is it is determined that described
FPGA occurs Interruption and reaches when delivering interval of the program information table to be sent, it is determined that meet transmission condition, and from
The memory extracts the content of the program information table to be sent, and is sent to rear end after the content is multiplexed with audio frequency and video and sets
It is standby；
Memory 903, for storing the content of the program information table to be sent.
Using the sending method of program information table provided in an embodiment of the present invention, apparatus and system, have below beneficial to effect
Fruit：The operation of the transmission of program information table is completed by FPGA, FPGA high-speed parallel disposal ability is taken full advantage of, saves
Cpu resource occupancy；Further, since FPGA is only responsible for sending the work of program information table, other work are will not relate to, so as to have
Effect reduces the time delay for sending program information table.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation
Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent
Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (13)
- A kind of 1. sending method of program information table, it is characterised in that including：For each program information table to be sent, on-site programmable gate array FPGA receives and caches central processor CPU transmission The content of the program information table to be sent and the attribute information of the program information table to be sent, the program to be sent Information table is Program Specific Information PSI table or business information SI tables, and the attribute information includes sending the program letter to be sent Breath table delivers interval；The memory that the content of the program information table to be sent of caching is write outside the FPGA；Determine that the FPGA occurs Interruption and reaches when delivering interval of the program information table to be sent, it is determined that meeting hair Condition is sent, and the content of the program information table to be sent is extracted from the memory, and by after the content and audio frequency and video multiplexing It is sent to rear end equipment.
- 2. the method as described in claim 1, it is characterised in that the attribute information also includes storing the program letter to be sent The initial address of the content of table is ceased, then the content of the program information table to be sent of the caching is write into depositing outside the FPGA Reservoir, specifically include：When determining the memory free time, since the start address of the content of program information table to be sent, by the caching The memory that the content of program information table to be sent is write outside the FPGA in the form of transport stream TS bag.
- 3. the method as described in claim 1, it is characterised in that also include：The multi-frame table that the CPU is sent is received, the multi-frame table is used to record packet identifier PID identical programs in same program Information table；It is determined that meeting transmission condition, specifically include：When determining that the program information table to be sent and the program information table being currently transmitted belong to the same multi-frame table, It is determined that when the program information table being currently transmitted is sent, it is determined that meeting transmission condition；Determine that the program information table to be sent and the program information table being currently transmitted are not belonging to the same multi-frame table When, it is determined that meeting transmission condition；When determining that the program information table to be sent is not belonging to any multi-frame table, it is determined that meeting transmission condition.
- 4. method as claimed in claim 3, it is characterised in that extract the program information table to be sent from the memory Content, specifically include：The transmission instruction of the program information table to be sent is generated, and instructs the deposit FPGA's to deliver queue described send In, it is described to send the attribute information that the program information table to be sent is carried in instruction；It is determined that when reaching the transmission order of the program information table to be sent, the transmission is extracted in queue refer to from described deliver Order；According to the initial address of the storage program information table to be sent for sending and being carried in instruction, from the memory TS bags corresponding to the program information table to be sent are extracted one by one, and are sent to rear end after the TS bags are multiplexed with audio frequency and video and are set It is standby.
- A kind of 5. sending method of program information table, it is characterised in that including：For each transport stream TS, program information table is extracted from the TS and is parsed, the program information table is that program is specific Information PSI table or business information SI tables；According to the related protocol of video request program, for having identical original packet identifier in the program information table after parsing The program information table of PID multiple programs, the original PID of respective program in the program information table is modified, obtains first Program information table, wherein, the amended PID of any two program is different；For amended PID identicals program information table in same program, amended PID identicals programme information is marked Record is in same multi-frame table；The content of first program information table and attribute information and the multi-frame table are sent to field-programmable gate array FPGA is arranged, so that the content of first program information table is sent to rear end equipment by the FPGA.
- 6. method as claimed in claim 5, it is characterised in that the attribute information includes the hair of first program information table State is sent, after the content of first program information table and attribute information are sent into on-site programmable gate array FPGA, really When fixed content and/or attribute information to first program information table is updated, by the hair of first program information table Send state to be arranged to suspend, and the halted state is sent to the FPGA, so that the FPGA is by first programme information The transmission state of table is changed to suspend；It is determined that when the renewal of the content and/or attribute information to first program information table is completed, first program is believed The transmission state of breath table is arranged to start, and the content of first program information table after renewal and/or attribute information are sent out Give the FPGA.
- 7. a kind of dispensing device of program information table, it is characterised in that described device is directed to each program information table to be sent, bag Include：Receiving unit, for receive and cache central processor CPU transmission the program information table to be sent content and The attribute information of the program information table to be sent, the program information table to be sent are Program Specific Information PSI table or business Information SI tables, the attribute information deliver interval including the transmission program information table to be sent；Writing unit, for the memory outside the content write-in described device by the program information table to be sent of caching；Transmitting element, for determining that Interruption occurs for described device and reach the program information table to be sent delivers interval When, it is determined that meet transmission condition, and extract from the memory content of the program information table to be sent, and by the content with Rear end equipment is sent to after audio frequency and video multiplexing.
- 8. device as claimed in claim 7, it is characterised in that said write unit is specifically used for：The attribute information also wraps When including the initial address for the content for storing the program information table to be sent, and determining the memory free time, from section to be sent The start address of the content of mesh information table starts, by the content of the program information table to be sent of the caching with transport stream TS bag Memory outside form write-in described device.
- 9. device as claimed in claim 7, it is characterised in that the receiving unit is additionally operable to：The multi-frame table that the CPU is sent is received, the multi-frame table is used to record packet identifier PID identical programs in same program Information table；When the transmitting element determines to meet transmission condition, it is specifically used for：When determining that the program information table to be sent and the program information table being currently transmitted belong to the same multi-frame table, It is determined that when the program information table being currently transmitted is sent, it is determined that meeting transmission condition；Determine that the program information table to be sent and the program information table being currently transmitted are not belonging to the same multi-frame table When, it is determined that meeting transmission condition；When determining that the program information table to be sent is not belonging to any multi-frame table, it is determined that meeting transmission condition.
- 10. device as claimed in claim 9, it is characterised in that the transmitting element extracts described pending from the memory When sending the content of program information table, it is specifically used for：The transmission instruction of the program information table to be sent is generated, and the transmission instruction deposit described device is delivered into queue In, it is described to send the attribute information that the program information table to be sent is carried in instruction；It is determined that when reaching the transmission order of the program information table to be sent, the transmission is extracted in queue refer to from described deliver Order；According to the initial address of the storage program information table to be sent for sending and being carried in instruction, from the memory TS bags corresponding to the program information table to be sent are extracted one by one, and are sent to rear end after the TS bags are multiplexed with audio frequency and video and are set It is standby.
- A kind of 11. dispensing device of program information table, it is characterised in that described device is directed to each transport stream TS, including：Extraction unit, for extracting program information table from the TS and parsing, the program information table is Program Specific Information PSI table or business information SI tables；Unit is changed, it is identical for having in the program information table after parsing for the related protocol according to video request program The program information table of original packet identifier PID multiple programs, the original PID of respective program in the program information table is repaiied Change, obtain the first program information table, wherein, the amended PID of any two program is different；For amended PID identicals program information table in same program, amended PID identicals programme information is marked Record is in same multi-frame table；Transmitting element, it is existing for the content of first program information table and attribute information and the multi-frame table to be sent to Field programmable gate array FPGA, so that the content of first program information table is sent to rear end equipment by the FPGA.
- 12. device as claimed in claim 11, it is characterised in that described device also includes：Updating block, when including the transmission state of first program information table for the attribute information, by the first segment After the content and attribute information of mesh information table are sent to on-site programmable gate array FPGA, it is determined that to first programme information When the content and/or attribute information of table are updated, the transmission state of first program information table is arranged to suspend, and will The halted state is sent to the FPGA, so that the transmission state of first program information table is changed to temporarily by the FPGA Stop；It is determined that when the renewal of the content and/or attribute information to first program information table is completed, first program is believed The transmission state of breath table is arranged to start, and the content of first program information table after renewal and/or attribute information are sent out Give the FPGA.
- A kind of 13. transmission system of program information table, it is characterised in that including：Central processor CPU, for for each transport stream TS, program information table being extracted from the TS and is parsed, the section Mesh information table is Program Specific Information PSI table or business information SI tables；According to the related protocol of video request program, to the institute after parsing State program information table accordingly to be changed, obtain the first program information table；By the content and category of first program information table Property information is sent to on-site programmable gate array FPGA；On-site programmable gate array FPGA, for receiving and caching first program information table of central processor CPU transmission Content and first program information table attribute information, for each first program information table, by first program As program information table to be sent, the attribute information includes sending between the delivering of the program information table to be sent information table Every；The memory that the content of the program information table to be sent of the caching is write outside the FPGA；Determine the FPGA hairs Raw Interruption and when delivering interval of the arrival program information table to be sent, it is determined that meeting transmission condition, and deposit from described Reservoir extracts the content of the program information table to be sent, and will be sent to rear end equipment after the content and audio frequency and video multiplexing；Memory, for storing the content of the program information table to be sent.
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| CN111726680B (en) * | 2020-06-17 | 2022-06-10 | 伟乐视讯科技股份有限公司 | Method and equipment for realizing EIT table multiplexing |
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| CN202183767U (en) * | 2011-07-07 | 2012-04-04 | 武汉微创光电股份有限公司 | Link type multi-business network video server |
| CN102625154A (en) * | 2012-02-23 | 2012-08-01 | 深圳市龙视传媒有限公司 | Transport stream multiplexing method, program receiver, server and system |
| CN104540005A (en) * | 2014-12-18 | 2015-04-22 | 北京数码视讯科技股份有限公司 | Program specific information (PSI) table acquisition method, device and system |
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| KR20100132153A (en) * | 2009-06-09 | 2010-12-17 | 삼성전자주식회사 | Apparatus and method for previewing broadcasting channel in portable terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202183767U (en) * | 2011-07-07 | 2012-04-04 | 武汉微创光电股份有限公司 | Link type multi-business network video server |
| CN102625154A (en) * | 2012-02-23 | 2012-08-01 | 深圳市龙视传媒有限公司 | Transport stream multiplexing method, program receiver, server and system |
| CN104540005A (en) * | 2014-12-18 | 2015-04-22 | 北京数码视讯科技股份有限公司 | Program specific information (PSI) table acquisition method, device and system |
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