WO2011076128A1

WO2011076128A1 - Method, code stream equipment, multiplexer and system for broadcasting program specific information/service information (psi/si)

Info

Publication number: WO2011076128A1
Application number: PCT/CN2010/080157
Authority: WO
Inventors: 何忠明
Original assignee: 深圳市同洲电子股份有限公司
Priority date: 2009-12-23
Filing date: 2010-12-23
Publication date: 2011-06-30
Also published as: HK1145243A1; CN101742272A; CN101742272B

Abstract

A method for broadcasting PSI/SI information which comprises the following steps: when the PSI/SI information of a plurality of frequency points is combined into one code stream of same code stream equipment and output to a signal amplifier, the number of packet identification (PID) required by each frequency point are determined, and a PID value of a PSI/SI information of each frequency point are successively determined on the basis of a preset PID value distribution strategy so as to ensure that the PID value of each frequency point PSI/SI information does not mutually collide (S101); a code stream, constituted by the PSI/SI information with determined PID value of each frequency point, is copied to be a multi-path code streams with the same content to the code stream through the signal amplifier, and said multi-path code streams are respectively accessed to the multiplexer (S102); from the code streams accessed, PID values of the PSI/SI information corresponding to the frequency points processed by the multiplexer are selected by said multiplexer and modified to standard PID values on the basis of the preset PID value distribution strategy, and the standard PID values are mixed into code streams of corresponding frequency points and transmitted to a digital television broadcasting network to provide to digital television terminal for receiving (S103). The embodiment of the invention can realize transmitting the PSI/SI information of a plurality of frequency points in one path code stream output by one code stream equipment in the digital television broadcasting network front end system.

Description

- -

PAI/SI information distribution method, code stream device, multiplexer and system The present application claims to be filed on December 23, 2009, the Chinese Patent Office, application number 200910189297.X, the invention name is "PSI/SI information distribution method" The priority of the Chinese Patent Application, the </ RTI> </ RTI> </ RTI> </ RTI> </ RTI> <RTIgt;

Technical field

The present invention relates to the field of digital television broadcasting, and in particular, to a method, a stream device, a multiplexer and a system for broadcasting PSI/SI information in a front end system of a digital television broadcasting network. Background technique

The PSI/SI (Program Specific Information/Service Information) information is basic information of DVB (Digital Video Broadcasting), and existing digital television broadcasting networks transmit PSI information and SI in the network. Information, used to describe information such as networks, transport streams, services, program events, and more. The PSI information in the digital television broadcasting operation network generally includes the following information: PAT (Program Association Table), CAT (Conditional Access Table), TSDT (Transport Stream Description Table), NIT (Network Information Table) and PMT (Program Map Table). The SI information in the digital television broadcasting operation network generally includes the following information: BAT (Brief Association Association Table), SDT (Service Description Table), EIT (Event Information Table), RST ( Running Status Table, TDT (Time and Date Table), TOT (Time Offset Table), ST (Stuffing Table), SIT (Selection Information Table) And DIT (Discontinuity Information Table).

The PSI information and the SI information are transmitted by a TS (Transport Stream) packet defined by the International Organization for Standards (International Organization for Standards) / IEC (International Electro-Technical Commission) 13818-1. Each TS packet uses a PID (Packet Identifier) to distinguish different information. The PID in each information is represented by 13 binary bits, and its value range is 0-8191. At the same time, the PID of the information other than the PMT in the PSI/SI information is determined by the standard, and the PID value of each type of PSI/SI information is fixed, and the overall range is 0-31, but the PID of the PMT information is specified by the PAT, which is not fixed. PID allocation is shown in Table-1: - - Table 1

In the current system for transmitting PSI/SI information, a single stream device on the broadcast server generates a code stream to transmit PSI/SI information of one frequency point to a port of the multiplexer to serve a frequency point. With the development of digital TV, the programs are more and more abundant, and the corresponding frequency points are more and more. When there are multiple frequency points in the network, the system for transmitting PSI/SI information needs to use multiple code stream devices correspondingly. The corresponding multiple code streams are generated to transmit the PSI/SI information of each frequency point, and the socket, computing power and storage capacity of the advertisement server are limited, so the number of code stream devices that can be accessed is also limited accordingly. If the accessed code stream device still cannot meet the requirements of more frequency points, then the broadcast server needs to be added to provide more code stream devices to meet the needs of more frequency points. This results in hardware device cost and maintenance cost, and increases the difficulty of backing up PSI/SI information and the difficulty of restoring PSI/SI information using backup information. Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a PSI/SI information broadcast method, a code stream device, a multiplexer and a system in a digital television broadcast network front-end system. It can realize the transmission of PSI/SI information of multiple frequency points in one code stream output by one code stream device in the front end system of the digital television broadcasting network, which can effectively save hardware equipment and maintenance cost.

In order to solve the above technical problem, an embodiment of the present invention provides a method for broadcasting PSI/SI information in a front end system of a digital television broadcasting network, and the method includes: - - When the program specific information/service information PSI/SI of a plurality of frequency points is combined into one code stream of the same code stream device and output to the signal amplifying device, the packet identification required for determining the PSI/SI information of each frequency point is determined. The PID number is determined, and the PID values of the PSI/SI information of each frequency point are sequentially determined according to the preset PID value allocation policy, so that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other;

And combining a PSI/SI information of each frequency point of the determined PID value into a code stream that is the same as the content of the code stream by the signal amplifying device, and respectively accessing the multiple code streams If the PID value of the PSI/SI information in the frequency point corresponding to the frequency point processed by the multiplexer in the received code stream is not a standard PID value, the multiplexer allocates a policy according to the PID value, and connects The PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer is selected in the incoming code stream, modified into a standard PID value, and mixed into the corresponding frequency code stream for output to the digital television broadcasting network for digital TV terminal.

Correspondingly, the embodiment of the present invention further provides a code stream device, where the code stream device includes: a code stream combining unit, configured to combine PSI/SI information of multiple frequency points into one code stream; Determining the number of PIDs required for each frequency point PSI/SI information, and sequentially determining the PID value of each frequency point PSI/SI information according to a preset PID value allocation policy, so that the PID of each frequency point PSI/SI information Values do not conflict with each other;

a sending unit, configured to combine the PSI/SI information of each frequency point of the determined PID value into a code stream that is the same as the code stream content by the signal amplifying device, and the multiplex code The streams are respectively connected to the multiplexer;

a mixing unit, configured to: if the PID value of the PSI/SI information in the frequency point corresponding to the frequency point processed by the multiplexer in the received code stream is not a standard PID value, according to the PID value allocation policy, the accessed code The PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer is selected in the stream, and is modified into a standard PID value, and mixed into the corresponding frequency point code stream for output to the digital television broadcasting network for the digital television terminal.

Correspondingly, an embodiment of the present invention further provides a multiplexer, where the multiplexer includes:

a receiving unit, configured to access a code stream of PSI/SI information that is sent by the code stream device and transmitted by the code stream device, where the code stream device determines each frequency before transmitting the code stream The number of PIDs required for the PSI/SI information is determined, and the PID values of the PSI/SI information of each frequency point are sequentially determined according to the preset PID value allocation policy, so that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other; a correction unit, configured to: if the PID value of the PSI/SI information in the frequency point corresponding to the frequency point processed by the multiplexer in the received code stream is not a standard PID value, according to the PID value allocation policy, from the receiving unit The PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer is selected in the accessed code stream, and is modified into a standard PID value, and mixed into the corresponding frequency code stream for output to the digital television broadcasting network. number - — Word TV terminal.

Correspondingly, the embodiment of the present invention further provides a PSI/SI information distribution system, where the system includes: an advertisement server, where the advertisement server includes at least one code stream device, and is used for multiple frequency points.

The PSI/SI information is combined into one code stream of the same code stream device for output to the signal amplifying device, and the number of PIDs required for each frequency point PSI/SI information is determined, and sequentially determined according to a preset PID value allocation strategy. The PID value of the PSI/SI information of each frequency point is such that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other; the signal amplifying device is configured to combine the PSI/SI information of each frequency point of the determined PID value into The code stream is copied by the signal amplifying device into a multiplexed code stream having the same content as the code stream, and the multiplexed code stream is respectively connected to the multiplexer;

a multiplexer group, comprising: a plurality of multiplexers, configured to: if the PID value of the PSI/SI information in the frequency point corresponding to the frequency point processed by the multiplexer in the received code stream is not a standard PID value, according to the PID a value allocation policy, selecting, from the code stream accessed by the receiving unit, a PID value of PSI/SI information corresponding to a frequency point processed by each multiplexer in the multiplexer group, and modifying the PID value into a standard PID value, And mixed into the corresponding frequency code stream and output to the digital television broadcasting network for the digital television terminal.

In the embodiment of the present invention, the PSI/SI information of multiple frequency points is combined into one code stream of the same code stream device, and each frequency point is sequentially determined according to the PID number and the PID value allocation strategy required for determining each frequency point. The PID value of the PSI/SI information is such that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other, and the code stream is copied into the multiple code streams by the signal amplifying device, and the code stream in the access code is accessed by the multiplexer. The PID value corresponding to the processed frequency point is selected from the PID value of the PSI/SI information and modified into a standard PID value and outputted to the corresponding frequency point code stream, thereby realizing one code stream output by one code stream device in the front end system of the digital television broadcasting network. Transmitting PSI/SI information at multiple frequency points can effectively save hardware equipment and maintenance costs, and reduce the difficulty of backing up PSI/SI information and the difficulty of recovering PSI/SI information using backup information. DRAWINGS

1 is a flowchart of a first embodiment of a method for implementing PSI/SI information broadcast according to the present invention;

2A is a flowchart of a method for determining the number of PIDs required to transmit PSI/SI information for each frequency point according to an embodiment of the present invention;

2B is a second flowchart of a method for determining the number of PIDs required to transmit PSI/SI information for each frequency point according to an embodiment of the present invention;

3 is a flowchart of a third embodiment of a method for implementing PSI/SI information advertisement according to the present invention;

4 is a schematic structural diagram of a first embodiment of a code stream device according to the present invention; - Figure 5 is a schematic structural view of a second embodiment of the code stream device of the present invention;

6 is a schematic structural view of a first embodiment of a multiplexer according to the present invention;

Figure 7 is a schematic structural view of a second embodiment of the multiplexer of the present invention;

FIG. 8 is a schematic diagram of a system for implementing broadcast of PSI/SI information according to the present invention. detailed description

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings.

1 is a flow chart of a first embodiment of a method for implementing PSI/SI information dissemination according to the present invention. As shown in FIG. 1, the method specifically includes:

Step S101: When the PSI/SI information of the multiple frequency points is combined into one code stream of the same code stream device and output to the signal amplifying device, determine the number of PID (Packet Identifiers) required for each frequency point. And determining the PID values of the PSI/SI information of each frequency point in turn according to the PID value allocation policy, so that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other.

The PID value allocation strategy in this embodiment is preset, and the modification parameters are mainly determined according to the number of PIDs required for each frequency point, and the PSI/SI information of each frequency point is combined with the MPEG standard and the DVB standard. The PID value is modified. The value of all PIDs for each frequency point is [0, 8191], and the maximum number of all PIDs is 8192.

Step S102: The code stream that has determined the PID value of each frequency point PSI/SI information is copied by the signal amplifying device into a multiplex code stream that is the same as the content of the code stream, and the obtained multiplexed code streams are respectively accessed. Use the device.

Step S103, the multiplexer selects a PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer from the accessed code stream according to the PID value allocation policy, and modifies the value into a standard PID value, and mixes the corresponding The frequency point stream is output to the digital television broadcasting network for reception by the digital television terminal; the standard PID value is in compliance with the digital television standard, for example: MPEG standard and D VB standard, and the defined PID value.

In the embodiment of the present invention, the PSI/SI information of multiple frequency points is combined into one code stream of the same code stream device and output to the signal amplifying device, and the PID number and the PID value allocation strategy required for determining each frequency point are sequentially Determining the PID value of the PSI/SI information of each frequency point so that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other, and pass the PID of the PSI/SI information in the code stream of the access by the multiplexer through the signal amplifying device Selecting the PID value of the processed frequency point and modifying it to the standard PID value output to the corresponding frequency point code stream, to realize the transmission of multiple frequency points of one code stream output by one code stream device in the front end system of the digital television broadcasting network PSI/SI information can effectively save hardware equipment and maintenance costs while reducing backup of PSI/SI information - - Difficulty and difficulty in restoring PSI/SI information using backup information.

For a more detailed description of the method for implementing the PSI/SI information advertisement, the following is a second embodiment of the method for implementing the PSI/SI information. The method includes:

Step S201: When combining PSI/SI information of multiple frequency points into one code stream of the same code stream device, determine the number of PIDs required for each frequency point.

In this embodiment, the number of PIDs required to transmit the PSI/SI information of each frequency point is determined. According to the usage requirements, there are two methods. Referring to FIG. 2A, FIG. 2A is a method for determining the transmission of each frequency point PSI/ in the embodiment of the present invention. A method flow chart of the number of PIDs required for SI information. Method one includes:

In step A1, the number of services of the PSI/SI information at each frequency point is determined to determine the number of PIDs required for the PMT information. The PID of the PMT information is specified by the PAT. When there are multiple services for each frequency point, the PID corresponding to the number is required to transmit the PMT information.

In step A2, the number of PIDs required for each frequency point is determined according to the number of fixed PIDs of each type of PSI/SI information and the number of PIDs required for PMT information specified by the digital television standard.

The PSI/SI information is transmitted by TS packets defined in the MPEG standard ISO/IEC 13818-1. Each TS packet uses PID to distinguish different information. The PID in each information is represented by 13 binary bits, and its value range is 0. -8191. At the same time, the PID other than the PID of the PMT information in the PSI/SI information is directly determined by the standard, and the fixed range is 0-31, so the number of PIDs required is 32. The digital television standard specification is the relevant definition in the MPEG standard ISO/IEC 13818-1.

Therefore, the number of PIDs required for each frequency point PSI/SI information is the accumulated PID number of each type of PSI/SI information and the accumulated number of PID numbers required for PMT information. When there are X services, the number of PIDs required for PMT information is X, and the number of PIDs required for the PSI/SI information is x+32.

In the case where the service of each frequency point is determined and the service expansion is no longer performed on the frequency point, the method of determining the number of PSI/SI information for each frequency point is used.

Referring to FIG. 2B, FIG. 2B is a flowchart of a method for determining the number of PIDs required to transmit PSI/SI information for each frequency point according to an embodiment of the present invention. Method two includes:

Step B1 is the same as step A1, and details are not described herein again.

In step B2, the number of PIDs required for each frequency point is determined according to the number of fixed PIDs of each type of PSI/SI information and the number of PIDs required for PMT information specified by the digital television standard.

In the case where the service of each frequency point is determined and the service expansion of the frequency point is required, a certain number of PID numbers can be reserved according to the predetermined schedule.

Then, the number of PIDs required for each frequency point is the number of fixed PIDs of each type of PSI/SI information, - -

The number of PIDs required for PMT information and the accumulated value of the number of services that need to be expanded in advance. When there are X services, the number of PIDs required for PMT information is X, and when y PIDs need to be reserved for service expansion, the number of PIDs required for the PSI/SI information of the frequency point is x+ y+32.

In this embodiment, according to the MPEG standard, the total number of PIDs required for each frequency point does not exceed 8,192, and the PID value range of all frequency points after modification is [0, 8191].

Step S202: Determine PID values of PSI/SI information of each frequency point according to the PID number and PID value allocation strategy required for determining each frequency point, so that the PID values of the PSI/SI information of each frequency point do not conflict with each other.

In this embodiment, the PID value allocation strategy is specifically:

Determining the standard PID value of the PSI/SI information of each frequency point. When there are N frequency points, and the number of PIDs required for the first frequency point is X, the standard PID of the PSI/SI information of the first frequency point is determined. The value range is [0, X _r 1 ], and the number of PIDs required for the second frequency point is X ₂ , and the standard PID value range of the PSI/SI information of the second frequency point is

[0, X ₂ -l]..., the number of PIDs required for the Nth frequency point is X _N , and the standard PID value range of the PSI/SI information of the Nth frequency point is [0, XN-1];

Determining, according to a preset modification parameter of the PSI/SI information of each frequency point, a standard PID value of the PSI/SI information of each frequency point; the preset modification parameter of the PSI/SI information of each frequency point Not less than the accumulated value of the number of PIDs of all frequency points before the frequency point.

The above is the PID value allocation strategy, which can also be understood as the execution step of the strategy.

The specific methods of the above modifications are as follows:

Obtaining a modified parameter of the modified PID value corresponding to the frequency point PSI/SI information according to the PID modification policy; adding the modified parameter to the PID value of the PSI/SI information of the frequency point, that is, obtaining the modified PSI/SI information PID value.

In this embodiment, the modified parameters are in the order of frequency points, and the modified parameters of the Nth frequency point are: Xi+ x ₂ +...+ X _{Nl o} When the number of frequency points is small, or the preset needs to be expanded If the number of services cannot guarantee the future expansion demand, the modified parameters can be adjusted to be larger than the value of Xi+ X2+. . .+ XN-I, and the new PID value after tampering is the sum of the original PID value and the tampering parameter.

In the above PID value allocation strategy, it is necessary to note that the PSI/SI information of each frequency point conforms to the standard PID value, taking the Nth frequency point as an example:

The fixed PID value range for each type of PSI/SI information is [0, 31];

When the preset number of services is not to be expanded, [32, X _N -1] PMT information necessary for the PID value range; when the preset number of services to be expanded, [32, X _N -1] is the PMT information The required PID value and the range of PID values required for the pre-set business to be expanded. - At the same time, in this embodiment, the PID value of the first frequency point is already a standard PID value, and the standard PID value is in compliance with a digital television standard, for example: MPEG standard and DVB standard, a limited PID value, of course, Set the modification parameter directly to zero.

Step S203: The code stream that has determined the PID value of the PSI/SI information of each frequency point is copied by the signal amplifying device into a multiplexed code stream that is the same as the content of the code stream, and the obtained multiplexed code streams are separately accessed. Use the device.

In this embodiment, the signal amplifying device copies and amplifies a code stream of PSI/SI information including a plurality of frequency points into a plurality of code streams containing a plurality of frequency points PSI/SI information, each containing the same content. The PID values of the plurality of frequency point PSI/SI information are all the modified PID values. Among them, the number of code streams obtained after copying is the same as the number of frequency points. The signal amplifying device is connected to the corresponding multiplexer, and transmits the multiplexed code stream that is amplified by the copy to the corresponding multiplexer through the broadcast outlet of the signal amplifying device.

Step S204, the multiplexer selects a PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer from the accessed code stream according to the PID value allocation policy, and modifies the value into a standard PID value, and mixes the corresponding The frequency code stream is output to a digital television broadcasting network for reception by the digital television terminal.

In this embodiment, the standard PID value is a PID value that is compliant with the MPEG standard and the DVB standard. After receiving the code stream containing multiple frequency point PSI/SI information, the multiplexer selects the modified PID value of the PSI/SI information belonging to the frequency point processed by the multiplexer, and according to the modification strategy of the PID value Change to the standard PID value.

Specific method ^ below:

Obtaining a modified parameter of the modified PID value corresponding to the frequency point PSI/SI information according to the preset PID modification policy; subtracting the modified parameter from the modified PID value of the PSI/SI information belonging to the current frequency point, that is, Obtain a standard PID value;

Or, according to the PID modification policy, the number of PIDs required for the corresponding frequency point PSI/SI information is obtained. For the Nth frequency point, the value is X _N , then the modified PID value can be directly modified to [0, X _N -1].

When a multiplexer can process multiple frequency points, the PSI/SI information corresponding to each frequency point is processed according to this principle and mixed to the corresponding code stream of the frequency point, and then output to the digital television broadcasting network.

In the embodiment of the present invention, the PSI/SI information of multiple frequency points is combined into one code stream of the same code stream device, and each frequency point is sequentially determined according to the PID number and the PID value allocation strategy required for determining each frequency point. The PID value of the PSI/SI information is such that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other, and the code stream is copied into the multi-channel code stream by the signal amplifying device, and is received from the accessed code stream by the multiplexer. The PID value corresponding to the processed frequency point is selected from the PID value of the PSI/SI information and modified into a standard PID value and outputted to the corresponding frequency point code stream to implement one-way code outputted by one code stream device in the front end system of the digital television broadcasting network. spread - - Transmitting PSI/SI information at multiple frequencies can save hardware equipment and maintenance costs, reduce the difficulty of PSI/SI information backup, and the difficulty of recovering PSI/SI information using backup information.

For a more detailed description of the method of the present invention, refer to FIG. 3, which is a flowchart of a third embodiment of a method for implementing PSI/SI information. The embodiment is exemplified by specific numerical values. In addition, other frequency-of-frequency service numbers applied to the digital television service network are equivalent changes according to the claims of the present invention and remain within the scope of the present invention.

In the embodiment shown in FIG. 3, the transmission is performed by using three frequency points. The first frequency point has five services and eight services for subsequent expansion are reserved. The second frequency point has 20 services and is reserved. 18 services for subsequent expansion, 10 services for the third frequency and 18 services for subsequent expansion.

Step S301: When the PSI/SI information of the three frequency points is combined into one code stream of the same code stream device and output to the signal amplifying device, the number of PIDs required for each frequency point PSI/SI information is determined.

According to the method 2 of determining the number of PIDs required to transmit the PSI/SI information of each frequency point according to the usage requirement, the number of PSI/SI information of each frequency point may be determined according to the step S201:

The number of PIDs required for the first frequency point PSI/SI information is 32+5+8, for a total of 45; the number of PIDs required for the second frequency point PSI/SI information is 32+20+18, for a total of 70; The number of PIDs required for the third frequency point PSI/SI information is 32+10+18, for a total of 60.

Step S302, determining PID values of PSI/SI information of each frequency point according to the PID number and PID value allocation strategy required for determining each frequency point, so that the PID values of the PSI/SI information of each frequency point do not conflict with each other.

In this embodiment, the PID value of each frequency point PSI/SI information is determined according to the PID value allocation strategy:

The number of PIDs required for the first frequency point is 45, and the standard PID value range of the PSI/SI information of the first frequency point is [0, 44]; the number of PIDs required for the second frequency point is 70, then the The standard PID value range of the PSI/SI information of the second frequency point is [0, 69]; the number of PIDs required for the third frequency point is 60, and the standard PID value range of the PSI/SI information of the third frequency point is [ 0, 59];

The standard PID value of the PSI/SI information of each frequency point is sequentially modified according to the modified parameter of the PSI/SI information of each frequency point. In this embodiment, the modified parameters are in the order of the frequency points, generally in front. The sum of the number of PIDs of all frequency points, the first frequency point need not be modified, or its modification parameter is set to zero; the modification parameter of the second frequency point PSI/SI information is 45, and the modification of the third frequency point PSI/SI information The parameter is 115.

The above is the PID value allocation strategy, which can also be understood as the execution step of the policy. - - It is also possible to judge the frequency of the received code stream corresponding to the frequency point processed by the multiplexer before the modification.

Whether the PID value of the PSI/SI information is a standard PID value; if the determination is yes, the PSI/SI information is directly mixed into the corresponding frequency point code stream and output to the digital television broadcasting network for reception by the digital television terminal; if the judgment is no And modifying the PID value of the PSI/SI information in the corresponding frequency point according to the above modified parameter. The modified PID value range of the first frequency point PSI/SI information is [0, 44], the PID value range of the second frequency point PSI/SI information is [45, 114], and the PID of the third frequency point PSI/SI information The range of values is [115, 174]. The PSI/SI information transmission of three frequency points is combined, and the PID value range is [0, 174].

Step S303, copying and amplifying the code stream of the PID value of each frequency point PSI/SI information into a three-way code stream containing three frequency points PSI/SI information by using a signal amplifying device, and The three streams are respectively connected to the multiplexer.

In this embodiment, the signal amplifying device further includes a function of amplifying the code stream signal, and the code stream of the PSI/SI information including the plurality of frequency points is copied and amplified into three channels having the same content as the PSI/SI. The code stream of the information, each PID value containing the plurality of frequency point PSI/SI information, and all of the modified PID values. The signal amplifying device is connected to the corresponding multiplexer, and transmits the multi-stream stream amplified by the copy to the corresponding multiplexer through the broadcast outlet of the signal amplifying device.

Step S304, the multiplexer selects a PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer from the accessed code stream according to the PID value allocation policy, and modifies the value into a standard PID value, and mixes the corresponding The frequency code stream is output to a digital television broadcasting network for reception by the digital television terminal.

In this embodiment, after receiving the code stream containing the PSI/SI information of the three frequency points, the multiplexer selects the modified PID value, and then modifies the modified PID value to the standard PID according to the modification policy of the PID value. Value, the standard PID value is in accordance with digital television standards, such as: MPEG standard and DVB standard, defined PID value.

Specific method ^ below:

The modified parameter of the modified PID value corresponding to the frequency PSI/SI information is obtained according to the PID modification policy; the modified parameter of the second frequency point PSI/SI information is 45, and the modified parameter of the third frequency point PSI/SI information is 115.

The modified PID value of the current frequency point PSI/SI information is subtracted from the modified parameter, that is, the standard PID value is obtained; the first frequency point does not need to be modified, and the PID value range of the frequency PSI/SI information is [0, 44]; The PID value range of the second frequency point PSI/SI information is [45, 114], after subtracting the modification parameter 45, the standard PID value range [0, 69] is obtained; the PID of the third frequency point PSI/SI information The value range is [115, 174]. After subtracting the modified parameter 115, the standard PID value range [0, 59] is obtained.

Or obtaining the number of PIDs required for the corresponding frequency point PSI/SI information according to the PID modification policy, - -

N frequency points, the value is X _N , then the modified PID value can be directly modified to [0, X _N -1]. The standard PID value range of the first frequency point PSI/SI information [0, 44]; the modified standard frequency value range of the second frequency point PSI/SI information [0, 69]; the modified third frequency point PSI/SI information The standard PID value range [0, 59].

In the embodiment of the present invention, the PSI/SI information of multiple frequency points is combined into one code stream of the same code stream device, and each frequency point is sequentially determined according to the PID number and the PID value allocation strategy required for determining each frequency point. The PID value of the PSI/SI information is such that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other, and the code stream is copied into the multi-channel code stream by the signal amplifying device, and is received from the accessed code stream by the multiplexer. The modified PID value of the corresponding frequency point is selected from the PID value of the PSI/SI information and modified into a standard PID value and outputted to the corresponding frequency point code stream, so as to realize the output of one code stream device in the front end system of the digital television broadcasting network. The code stream transmits PSI/SI information of multiple frequency points, which can effectively save hardware equipment and maintenance costs, reduce the difficulty of backup of PSI/SI information, and the difficulty of recovering PSI/SI information by using backup information.

4 is a schematic structural view of a first embodiment of a code stream device of the present invention. As shown in FIG. 4, the code stream device specifically includes: a code stream combining unit 410, an allocating unit 420, and a transmitting unit 430.

The code stream combining unit 410 is configured to combine PSI/SI information of multiple frequency points into one code stream.

The allocating unit 420 is configured to determine a PID number required for each frequency point PSI/SI information, and sequentially determine a PID value of each frequency point PSI/SI information according to a preset PID value allocation policy, so that each frequency point PSI/ The PID values of the SI information do not conflict with each other;

The sending unit 430 is configured to send, to the signal amplifying device, the code stream that has determined the PID value of the PSI/SI information of each frequency point, and copy and enlarge the same into the same multiplexed code stream as the content of the code stream by using the signal amplifying device, The obtained multiple streams are respectively connected to the multiplexer, so that the multiplexer selects the PID of the PSI/SI information corresponding to the frequency point processed by the multiplexer from the accessed code stream according to the PID value allocation policy. The value is modified into a standard PID value, and mixed into the corresponding frequency code stream for output to the digital television broadcast network for reception by the digital television terminal; the standard PID value is a PID value that is compliant with the MPEG standard and the DVB standard.

In the embodiment of the present invention, the PSI/SI information of multiple frequency points is combined into one code stream of the same code stream device, and each frequency point is sequentially determined according to the PID number and the PID value allocation strategy required for determining each frequency point. The PID value of the PSI/SI information is such that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other, and the code stream is copied and amplified into a multi-channel code stream by the signal amplifying device, and the code stream is accessed from the multiplexer. In the PID value of the PSI/SI information, the PID value of the processed frequency point is selected and the standard PID value is modified and outputted to the corresponding frequency point code stream, so as to realize the output through a code stream device in the front end system of the digital television broadcasting network. The code stream transmits PSI/SI information of multiple frequency points, which can effectively save hardware equipment and maintenance costs, reduce the difficulty of backup of PSI/SI information, and the difficulty of recovering PSI/SI information by using backup information. - Figure 5 is a block diagram showing the structure of the second embodiment of the code stream device of the present invention. As shown in FIG. 5, the code stream device specifically includes: a code stream combining unit 510, an allocating unit 520, and a sending unit 530. The code stream combining unit 510 and the sending unit 530 are the same as the code stream combining unit 410 and the sending unit 430 in the embodiment shown in FIG. 4, and details are not described herein again.

The allocating unit 520 specifically includes: a PID number setting unit 521 and a PID value setting unit 522.

The PID number setting module 521 is configured to determine the number of services under the PSI/SI information of each frequency point to determine the number of PIDs required for the PMT information, and then according to the number of PIDs required by the PMT information and the digital television standard. The number of fixed PIDs of each type of PSI/SI information determines the number of PIDs required for each frequency point, or the number of PIDs required according to the PMT information and the number of fixed PIDs of each type of PSI/SI information. And the number of pre-set services that need to be extended to determine the number of PIDs required for each frequency point PSI/SI information.

The PID value setting module 522 is configured to sequentially determine the PID value of each frequency point PSI/SI information according to the number of PIDs required for each frequency point determined by the PID number calculation module 521 and the PID value allocation policy to make each frequency The PID values of the point PSI/SI information do not conflict with each other.

The PID value setting module 522 specifically includes: a standard PID value setting module 5221 and a PID value modifying module 5222.

The standard PID value setting module 5221 is configured to determine a standard PID value of PSI/SI information of each frequency point; when there are N frequency points, and the number of PIDs required for the first frequency point is X _{l, the} first The standard PID value range of the PSI/SI information of the frequency point is set to [0, Xi-1], and the number of PIDs required for the second frequency point is X ₂ , then the standard PID of the PSI/SI information of the second frequency point is set. The value range is [0, X ₂ -l], and the number of PIDs required for the Nth frequency point is X _N , then the standard PID value range of the PSI/SI information of the Nth frequency point is set to [0, XN-1 ];

The PID value modification module 5222 is configured to sequentially modify the standard PID value of the PSI/SI information of each frequency point according to the preset modification parameter of the PSI/SI information of each frequency point; the preset frequency point PSI The modification parameter of the /SI information is not less than the accumulated value of the number of PIDs of all the frequency points before the frequency point.

The embodiment of the invention can realize PSI/SI information of multiple frequency points transmitted by one code stream outputted by one code stream device in the front end system of the digital television broadcasting network, which can effectively save hardware equipment and maintenance cost, and reduce PSI/SI information at the same time. The difficulty of backup and the difficulty of restoring PSI/SI information using backup information.

Figure 6 is a block diagram showing the structure of the first embodiment of the multiplexer of the present invention. As shown in FIG. 6, the multiplexer body includes: a receiving unit 610 and a correcting unit 620.

The receiving unit 610 is configured to receive, by the signal amplifying device, a code stream of PSI/SI information that is sent by the code stream device and includes multiple frequency points. The code stream device determines each frequency point before transmitting the code stream. The number of PIDs required for PSI/SI information, and each of them is determined in turn according to a preset PID value allocation policy. - The PID values of the PSI/SI information of the frequency points are such that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other.

The correcting unit 620 is configured to select, according to the PID value allocation policy, the PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer from the code stream accessed by the receiving unit 610, and modify the PID value into a standard PID value. And mixed into the corresponding frequency point code stream and output to the digital television broadcasting network for receiving by the digital television terminal.

Figure 7 is a block diagram showing the structure of a second embodiment of the multiplexer of the present invention. As shown in FIG. 7, the multiplexer body includes: a receiving unit 710 and a correcting unit 720. The receiving unit 710 is the same as the receiving unit 610 shown in FIG. 6, and details are not described herein again.

The correcting unit 720 specifically includes: a determining module 721 and a correcting sub-module 722.

The determining module 721 is configured to determine whether the PID value of the PSI/SI information in the corresponding frequency point in the code stream received by the receiving unit is a standard PID value.

The correction sub-module 722, when the PID value of the PSI/SI information in the determining module 721 is a non-standard PID value, correcting the PID value of the PSI/SI information to a standard PID value according to the PID value allocation policy, And mixed into the corresponding frequency point code stream and output to the digital television broadcasting network for receiving by the digital television terminal. When the PID value of the PSI/SI information of the judging module 721 is a standard value, no correction is needed. The PID value allocation strategy has been described in detail, and details are not described herein again.

FIG. 8 is a schematic diagram of a system for implementing PSI/SI information broadcast according to the present invention. As shown in Figure 8, the system includes:

The advertisement server 810, the advertisement server includes at least one code stream device 811, configured to combine PSI/SI information of multiple frequency points into one code stream of the same code stream device, and determine PSI/SI information for each frequency point. The number of required PIDs is determined in turn according to a preset PID value allocation policy. The PID values of the PSI/SI information of each frequency point are such that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other.

In this embodiment, the PID value allocation strategy is specifically:

Determining the standard PID value of the PSI/SI information of each frequency point. When there are N frequency points, and the number of PIDs required for the first frequency point is X, the standard PID of the PSI/SI information of the first frequency point is determined. The value range is [0, X _r 1 ], and the number of PIDs required for the second frequency point is X ₂ , and the standard PID value range of the PSI/SI information of the second frequency point is - -

[0, X ₂ - l ] . . . , the number of PIDs required for the Nth frequency point is X _N , and the standard PID value range of the PSI/SI information of the Nth frequency point is [0, XN-1];

The standard PID value of the PSI/SI information of each frequency point is sequentially modified according to the modified parameter of each frequency point; the modified parameter of each frequency point is not less than the accumulation of the PID number of all the frequency points before the frequency point. value.

In this embodiment, the modified parameters are in the order of frequency points, and the modified parameters of the Nth frequency point are: Xi+ x ₂ +...+ X _{Nl o} When the number of frequency points is small, or the preset needs to be expanded The number of services cannot guarantee future expansion requirements, and the modified parameters can be adjusted to be larger than the values of Xi+ X2+. . . . XN-I.

In the above PID value allocation strategy, it is necessary to pay attention to the standard PID value of the PSI/SI information of each frequency point, taking the Nth frequency point as an example:

The fixed PID value range for each type of PSI/SI information is [0, 31];

When the number of services to be expanded is not set in advance, [32, X _N -1] is the value range PMT PID information needed; when the number of services to be expanded is set in advance, [32, X _N -1] is The PID value required for the PMT information and the preset PID value range required for the service to be expanded.

At the same time, in this embodiment, the PID value of the first frequency point is already a standard PID value, so it may not be modified, and of course, the modified parameter may be directly set to zero.

The signal amplifying device 820 is configured to copy the code stream that has been determined by the advertisement server 810 and has determined the PID value of each frequency point PSI/SI information into a plurality of code streams having the same content, and respectively connect the multiple code streams Into the multiplexer. The code stream after determining the PID value of each frequency point PSI/SI information is transmitted to the multiplexer in the multiplexer group through the broadcast outlet of the signal amplifying device.

The multiplexer group 830 includes a plurality of multiplexers for selecting PSI/SI information corresponding to the frequency points processed by the multiplexers in the multiplexer group from the accessed code streams according to the PID value allocation policy. The PID value is modified into a standard PID value and mixed into the corresponding frequency code stream for output to the digital television broadcasting network for reception by the digital television terminal.

The digital television terminal of the embodiment of the present invention includes but is not limited to: a set top box, a digital television integrated machine, a television mobile phone, and the like having a function of receiving a digital television. In the embodiment of the present invention, the PSI/SI information of multiple frequency points is combined into one code stream of the same code stream device, and each frequency point is sequentially determined according to the PID number and the PID value allocation strategy required for determining each frequency point. The PID value of the PSI/SI information is such that the PID values of the PSI/SI information of each frequency point do not conflict with each other, and the code stream is copied into a multi-stream stream by the signal amplifying device, and the multiplexer will access the code stream. Select the PID value of the corresponding frequency point and modify the PID value of the PSI/SI information. - - Outputs the standard PID value to the corresponding frequency code stream to realize PSI/SI information of multiple frequency points transmitted by one code stream device in the digital TV broadcast network front-end system, which can effectively save hardware equipment And maintenance costs, while reducing the difficulty of backing up PSI/SI information and the difficulty of recovering PSI/SI information using backup information.

The above are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the equivalent changes made by the claims of the present invention are still within the scope of the present invention.

Claims

Rights request

A method for broadcasting PSI/SI information, comprising:

When the program specific information/service information PSI/SI of a plurality of frequency points is combined into one code stream of the same code stream device and output to the signal amplifying device, the packet identifier PID required for the PSI/SI information of each frequency point is determined. And determining the PID values of the PSI/SI information of each frequency point according to the preset PID value allocation policy, so that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other;

And combining a PSI/SI information of each frequency point of the determined PID value into a code stream that is the same as the content of the code stream by the signal amplifying device, and respectively accessing the multiple code streams Use crying.?

If the PID value of the PSI/SI information in the frequency point corresponding to the frequency point processed by the multiplexer in the received code stream is not a standard PID value, the multiplexer allocates a policy according to the PID value, from the accessed code. The PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer is selected in the stream, and is modified into a standard PID value, and mixed into the corresponding frequency point code stream for output to the digital television broadcasting network for the digital television terminal.

2. The method of claim 1, wherein the determining the number of PIDs required for PSI/SI information for each frequency point comprises:

Determining the number of services under the PSI/SI information of each frequency point to determine the number of PIDs required for the PMT information of the program mapping table;

Determining the number of PIDs required for PSI/SI information for each frequency point according to the number of fixed PIDs of each type of PSI/SI information and the number of PIDs required for PMT information specified by the digital television standard, or, according to each The number of fixed PIDs of the type PSI/SI information, the number of PIDs required for the PMT information, and the number of services that need to be expanded in advance determine the number of PIDs required for each frequency point PSI/SI information.

The method according to claim 2, wherein the PID value of each frequency point PSI/SI information is sequentially determined according to a preset PID value allocation policy, so that the PID values of the PSI/SI information of each frequency point are mutually Non-conflicts include:

Determining the standard PID value of the PSI/SI information of each frequency point. When there are N frequency points, and the number of PIDs required for the nth frequency point is X _n , the standard of the PSI/SI information of the nth frequency point The PID value range is [0, X _n -1], and the standard PID value range of the PSI/SI information of the Nth frequency point is [0, X _N -1]; where N is a positive integer greater than 1, and n is a positive integer from 1 to N;

Determining, according to a preset modification parameter of the PSI/SI information of each frequency point, a standard PID value of the PSI/SI information of each frequency point; the preset modification parameter of the PSI/SI information of each frequency point The accumulated value of the number of PIDs of PSI/SI information not less than all frequency points before the frequency point.

The method according to claim 3, wherein the preset modification parameter of each frequency point PSI/SI information is an accumulation of PID numbers of PSI/SI information of all frequency points before the frequency point. value.

5. A method according to any one of claims 1 to 4, characterized in that:

Determining whether a PID value of PSI/SI information in a frequency point corresponding to a frequency point processed by the multiplexer in the received code stream is a standard PID value;

If the determination is yes, the PSI/SI information is mixed into the corresponding frequency point code stream and output to the digital television broadcast network for receiving by the digital television terminal;

If the determination is no, the multiplexer selects a PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer from the accessed code stream according to a preset PID value allocation policy, and modifies the value into a standard PID value. .

6. A code stream device, comprising:

a code stream combining unit, configured to combine PSI/SI information of multiple frequency points into one code stream; an allocation unit, configured to determine a PID number required for each frequency point PSI/SI information, and according to a preset The PID value allocation strategy sequentially determines the PID values of the PSI/SI information of each frequency point, so that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other;

a sending unit, configured to combine a PSI/SI information of each frequency point of the determined PID value into a code stream that is the same as the content of the code stream by the signal amplifying device, and the multiplex code The streams are respectively connected to the multiplexer;

a mixing unit, configured to: if the PID value of the PSI/SI information in the frequency point corresponding to the frequency point processed by the multiplexer in the received code stream is not a standard PID value, according to the PID value allocation policy, the accessed code The PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer is selected in the stream, and is modified into a standard PID value, and mixed into the corresponding frequency point code stream for output to the digital television broadcasting network for digital television terminal. End.

The code stream device according to claim 6, wherein the allocating unit comprises: a PID number setting module, configured to determine a number of services under each frequency point PSI/SI information to determine PMT information. The number of PIDs, and the number of PIDs required for each frequency point PSI/SI information is determined according to the number of PIDs required for the PMT information and the number of fixed PIDs of each type of PSI/SI information specified by the digital television standard. Or determining the number of PIDs required for each frequency point PSI/SI information according to the number of PIDs required for the PMT information and the number of fixed PIDs of each type of PSI/SI information and the number of services that need to be expanded in advance. Number

a PID value setting module, configured to sequentially determine a PID value of each frequency point PSI/SI information according to a PID number required for each frequency point PSI/SI information determined by the PID number calculation unit and a PID value allocation policy The PID values of the PSI/SI information of each frequency point do not conflict with each other.

The code stream device according to claim 7, wherein the PID value setting module comprises:

a standard PID value setting module, configured to determine a standard PID value of PSI/SI information of each frequency point, when there are N frequency points, and the number of PIDs required for the nth frequency point is X _n , then the nth frequency The standard PID value range of the point PSI/SI information is [0, X _n -1], then the standard PID value range of the PSI/SI information of the Nth frequency point is [0, X _N -1]; where N is a positive integer greater than 1, and n is a positive integer from 1 to N;

a PID value modification module, configured to sequentially modify a standard PID value of PSI/SI information of each frequency point according to a preset modification parameter of each frequency point PSI/SI information; and each preset frequency point PSI/ The modification parameter of the SI information is not less than the accumulated value of the number of PIDs of all the frequency points before the frequency point.

9. A multiplexer, comprising:

a receiving unit, configured to access a code stream of PSI/SI information that is sent by the code stream device and transmitted by the code stream device, where the code stream device determines each frequency before transmitting the code stream; The number of PIDs required for the PSI/SI information is determined, and the PID values of the PSI/SI information of each frequency point are sequentially determined according to the PID value allocation strategy set in advance, so that the PID values of the PSI/SI information of each frequency point are not mutually exclusive. a correction unit, configured to: if the PID value of the PSI/SI information in the frequency point corresponding to the frequency point processed by the multiplexer in the received code stream is not a standard PID value, according to the PID value allocation policy, from the receiving unit Selecting the PID value of the PSI/SI information corresponding to the frequency point processed by the multiplexer in the accessed code stream, modifying the PID value into a standard PID value, and mixing the same into the corresponding frequency code stream for output to the digital television broadcasting network. Digital TV terminal.

The multiplexer according to claim 9, wherein the modifying unit further comprises: a determining submodule, configured to determine, in the code stream received by the receiving unit, corresponding to a frequency point processed by the multiplexer Whether the PID value of the PSI/SI information in the frequency point is a standard PID value;

a correction submodule, when the PID value of the PSI/SI information of the determining module is a non-standard PID value, according to the PID value allocation policy, selecting a processed frequency point corresponding to the code stream accessed by the receiving unit The PID value of the PSI/SI information is modified into a standard PID value and mixed into the corresponding frequency code stream for output to the digital television broadcasting network for the digital television terminal.

The PID value allocation strategy is:

Determining the standard PID value of the PSI/SI information of each frequency point. When there are N frequency points, and the number of PIDs required for the nth frequency point is X _n , the standard of the PSI/SI information of the nth frequency point The PID value range is [0, X _n -1], and the standard PID value of the PSI/SI information of the Nth frequency point is [0, X _N -1]; where N is a positive integer greater than 1, and n is a positive integer from 1 to N;

Determining, according to a preset modification parameter of each frequency point PSI/SI information, a standard PID value of PSI/SI information of each frequency point; the preset modification parameter of each frequency point PSI/SI information is not less than The accumulated value of the number of PIDs of all frequency points before the frequency point.

11. A PSI/SI information distribution system, comprising:

a broadcast server, the broadcast server including at least one code stream device for using multiple frequency points

The PSI/SI information is combined into one code stream of the same code stream device for output to the signal amplifying device, and the number of PIDs required for each frequency point PSI/SI information is determined, and sequentially determined according to a preset PID value allocation strategy. The PID value of the PSI/SI information of each frequency point is such that the PID values of the PSI/SI information of the respective frequency points do not conflict with each other;

a signal amplifying device, configured to combine PSI/SI information of each frequency point of the determined PID value into The code stream is copied by the signal amplifying device into a multiplexed code stream having the same content as the code stream, and the multiplexed code stream is respectively connected to the multiplexer;

a multiplexer group, comprising: a plurality of multiplexers, configured to: if the PID value of the PSI/SI information in the frequency point corresponding to the frequency point processed by the multiplexer in the received code stream is not a standard PID value, according to the PID a value allocation policy, selecting, from the code stream accessed by the receiving unit, a PID value of PSI/SI information corresponding to a frequency point processed by each multiplexer in the multiplexer group, and modifying the PID value to a standard PID value, And mixed into the corresponding frequency code stream and output to the digital television broadcasting network for the digital television terminal.