CN113973219B - Method and circuit system for obtaining program information - Google Patents
Method and circuit system for obtaining program information Download PDFInfo
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- CN113973219B CN113973219B CN202010715385.5A CN202010715385A CN113973219B CN 113973219 B CN113973219 B CN 113973219B CN 202010715385 A CN202010715385 A CN 202010715385A CN 113973219 B CN113973219 B CN 113973219B
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- 238000000034 method Methods 0.000 title claims abstract description 44
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 238000010408 sweeping Methods 0.000 claims abstract description 4
- 230000008859 change Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000007246 mechanism Effects 0.000 abstract description 6
- 230000009471 action Effects 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012546 transfer Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
- H04N21/2355—Processing of additional data, e.g. scrambling of additional data or processing content descriptors involving reformatting operations of additional data, e.g. HTML pages
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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]
- H04N21/20—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
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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
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
- H04N21/4355—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving reformatting operations of additional data, e.g. HTML pages on a television screen
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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
- H04N21/47—End-user applications
- H04N21/482—End-user interface for program selection
- H04N21/4825—End-user interface for program selection using a list of items to be played back in a given order, e.g. playlists
Abstract
A method for obtaining program information and a circuit system for executing the method are applied to a digital television system, and the program information is obtained by utilizing a dynamic packet identifier filtering mechanism. In the method, a main guide table is obtained from a transmission stream of a digital television signal, syntax analysis is performed to obtain sequence packet identifiers, then polling can be performed according to the packet identifiers to obtain program information corresponding to each packet identifier, wherein the program information corresponding to each packet identifier is obtained by sweeping one group of packet identifiers at a time according to a filter window, and after completion, the filter window is moved to another group of packet identifiers to perform polling to obtain the program information corresponding to each packet identifier, so as to form an electronic program guide.
Description
Technical Field
The invention discloses a method for acquiring program information, in particular to a method and a circuit system for acquiring electronic program information by a dynamic packet identifier filtering mechanism.
Background
Along with the development of digital technology, televisions have also entered the era of digital televisions, and downloaded images have the characteristics of multi-channel and high-quality playing, wherein digital image information includes electronic program guides (Electronic Program Guide, EPG) in addition to images and sounds, so that users can obtain program information of each channel in a plurality of time periods through the electronic program guides, and even can reserve and record favorite programs.
The above electronic program guide is obtained by an event information table (Event Information Table, EIT) or an extended text table (Extended Text Table, ETT) specification in a digital television standard formulated by the advanced television systems committee (Advanced Television Systems Committee, ATSC). Wherein the event information table provides information of each event in the electronic program guide in time sequence, the event information is distinguished by a packet identifier (packet identifier, PID), and the electronic program guide is composed by event information (including service information (Service Information, SI)) and the like of a period before and after. The information provided by the event information table comprises: the identification number of the event, the start time, the program length, the play status, the introduction of the event, the program level, etc. The service information is used to describe the delivery system, delivery content, streaming time, etc.
Depending on the specifications, an Event Information Table (EIT) or an Extended Text Table (ETT) event needs to take data with a packet identifier filter (PID filter), but a packet identifier can cover only 3 hours of information, and if an electronic program guide of one day (24 hours) is to be taken, 8 packet identifiers are required, and the electronic program guide needs to have contents of several days, and in order to meet the electronic program guide requirements of several days (e.g., 7 days), a large number of packet identifiers are required, so the hardware cost is quite high, and the practice of various manufacturers is very diverse.
For example, a large number of Packet Identifiers (PIDs) may be set initially, and the filter is reused to obtain the required data, but at a higher hardware cost (e.g., memory); another way is to set the packet identifier only when an event in the electronic program guide is selected, and then obtain the data according to the set packet identifier, however, this depends on the frequency of obtaining the event information table in the data stream and the time of the syntax analysis (parsing) algorithm, which may cause some delay to make the user feel bad.
Disclosure of Invention
In order to provide a complete and instant electronic program guide under the limitation of hardware, the invention discloses a method and a circuit system for acquiring program information, wherein the main embodiment is to realize the acquisition of Electronic Program Guide (EPG) information by a mechanism of dynamically setting a Packet Identifier (PID) filter for an Event Information Table (EIT) or an Extended Text Table (ETT), so that the burden of hardware can be reduced.
According to an embodiment of the present invention, the method for acquiring program information is applied to a circuit system, and an electronic program guide obtained by the method for acquiring program information can be stored in a memory of the circuit system.
In the method, a main guide table (Master Guide Table, MGT) is obtained from a transmission stream of a received digital television signal, then a grammar analysis is performed on the main guide table to form an event information table or an extended text table for providing each event information in an electronic program guide in time sequence, and a sequence packet identifier is taken out, so that polling can be performed according to the sequence packet identifier to obtain program information corresponding to each packet identifier, wherein in the polling step, program information corresponding to each packet identifier in a filter window can be obtained through polling according to one group of packet identifiers at a time, the filter window is moved to another group of packet identifiers after completion, polling is continued to obtain the program information corresponding to each packet identifier, and the electronic program guide is formed after completion.
Further, each time program information corresponding to the plurality of packet identifiers covered is acquired according to the filter window polling, the state of the filter window may be recorded by using the state machine.
Further, in one embodiment, when the parsing step is performed, if the main guide table is found to be changed or the set time is reached, the main guide table is updated, and then the parsing and retrieving of the packet identifier are continued. Whereas the parsing and polling steps are preferably operated in the circuitry in a background program.
The memory in the circuitry implements a program information database for storing the retrieved electronic program guide.
The invention discloses a circuit system, which is arranged in a digital television system and comprises:
a processor and a memory;
wherein the method for acquiring the program information is executed by the processor and comprises the following steps:
obtaining a main guide table from a transport stream of a digital television signal;
performing syntax analysis on the main guide table to form an event information table or an extended text table for providing each event information in the electronic program guide in time sequence, and taking out a sequence packet identifier; and
and executing polling according to the sequence packet identifiers to obtain program information corresponding to each packet identifier, wherein in the polling step, the program information corresponding to each packet identifier in the filtering window is obtained through polling according to the filtering window sweeping one group of packet identifiers at a time, and after the completion, the filtering window is moved to another group of packet identifiers to carry out polling to obtain the program information corresponding to each packet identifier, so as to form an electronic program guide.
For a further understanding of the nature and the technical aspects of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for purposes of reference only and are not intended to limit the invention.
Drawings
FIG. 1 shows an exemplary schematic diagram of a server architecture for providing program information for a digital television system;
FIG. 2 is a diagram of an embodiment of circuitry for performing a method of retrieving program information;
FIG. 3 is a diagram of an embodiment of a dynamic package identifier controller used in a method of retrieving program information; and
fig. 4 shows a flowchart of an embodiment of a method of retrieving program information.
Detailed Description
The following embodiments of the present invention are described in terms of specific examples, and those skilled in the art will appreciate the advantages and effects of the present invention from the disclosure herein. The invention is capable of other and different embodiments and its several details are capable of modifications and various other uses and applications, all of which are obvious from the description and of which are made, without departing from the spirit of the invention. The drawings of the present invention are merely schematic illustrations, and are not intended to be drawn to actual dimensions. The following embodiments will further illustrate the related art content of the present invention in detail, but the disclosure is not intended to limit the scope of the present invention.
It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are principally intended to be used to distinguish one element from another element, or signal from another. In addition, the term "or" as used herein shall include any one or combination of more of the associated listed items as the case may be.
The invention discloses a method and circuit system for obtaining program information, which is applied to a digital television system, fig. 1 shows an exemplary schematic diagram of a server architecture for providing program information of the digital television system, a program and system information protocol unit 103 at a system end can be implemented by a service system for providing program information under specific standards, such as an electronic program guide, wherein the program information can be integrated with program content of specific sources, such as a digital television signal 11 provided by a program provider, and the digital television signal 11 is subjected to signal merging through a first multiplexer (mux) 101 implemented in software or hardware so as to enable the digital television signal 11 to transmit various signals on one channel.
The program information is combined with the program information generated by the digital television signal 11 and the program and system information protocol unit 103 by another multiplexer, namely a second multiplexer 105, and the data is converted into a wireless signal by a modulator (modulator) 107 to form stream information, and then is transmitted to the terminal in a stream manner by a transmitter (transmitter) 109.
In an embodiment, in which the program and system information protocol unit 103 uses the program and system information protocol (program and systeminformation protocol, PSIP) to transmit information, the program and system information protocol defines channels (channels) and content ratings (content ratings), a digital television system is applicable, and the program information, that is, a mode of electronic program guide transmission, can be carried in metadata (metadata) in the stream information of the digital television signal 11.
According to the embodiment of the digital television system, the digital television signal 11 and the program information are digitized by the second multiplexer 105 to form data bits, and the transmitted data packets conform to a format of a specified transmission protocol, such as a Transport Stream (TS) standard of MPEG-2, so that when the digital data is transmitted according to the standard, the digital data can be cut into a plurality of fixed-length Transport Stream packets (TS packets), each packet is connected to an associated data Stream (data Stream) by the Packet Identifier (PID), and each packet identifier corresponds to an audio-video Stream in the digital television signal. The method for acquiring the program information disclosed in the specification is to acquire the corresponding program information by analyzing the packet identifier.
Fig. 1 shows a circuit system embodiment for generating stream information by a server system for providing digital television signals and program information, and a terminal receiving the stream information, referring to fig. 2.
Fig. 2 shows circuitry for running a method of obtaining program information, where the circuitry may be an Integrated Circuit (IC) or related circuit module in a digital television, and the digital television may download a video from a server system according to a channel and a time period of a user, and play the video on the digital television.
The digital television signal 21 received from the server system is shown as received by a terminal receiving device (e.g., a digital television), for example, a wireless signal, received by a digital television tuner 207, filtered, amplified, down-converted, and analog-to-digital converted, and then provided to a digital television demodulator 208 for demodulation to form a television signal that is provided to circuitry 20.
The circuitry 20, such as circuitry within a digital television, includes a processor 201, wherein the processor 201 is electrically coupled to other circuit elements, processes signals generated by the circuit elements, and is configured to control the operation of the circuit elements. Under the control of the processor 201, the television signal carrying the program information is separated by the demultiplexer (demux) 202, and a portion of the digital television signal is generated by the decoder (decoder) 203 into video (video) 22 and audio (audio) 23 for viewing and listening, and is played on the display screen. Portions of the program information (including the electronic program guide) are processed by the processor 201 and stored in memory in the circuitry 20, which according to this embodiment implements a program information database 205 for storing information of the electronic program guide or related program content.
It is noted that the memory (which may be represented by the program information database 205) in the circuitry 20 may be referred to as a memory for various purposes, such as a software program for storing related software and operation programs for operating the system, a software program for storing a method for acquiring program information operated by the system, and a file or index of an electronic program guide acquired by the method for acquiring program information, and the method for acquiring program information is operated by the processor 201 after executing the software program.
At this point, the streaming information received by circuitry 20 is processed to form digital television information for playback, including video 22 and audio 23. Wherein the memory may be used to store desired information, such as packet identifiers in streaming video, at the same time when the method of retrieving program information is run in the processor 201.
In the process of forming the digital television information, the circuitry 20 may operate an operation interface provided by the digital television, such as a remote control or a control panel, generate a signal for searching for television content, convert the signal into a control signal, and then the processor 201 may request related video data and download the related packet identifier to obtain an electronic program guide for a time period.
In the prior art, the manner in which an Electronic Program Guide (EPG) is obtained is in accordance with the Event Information Table (EIT) or the Extended Text Table (ETT) specification in the digital television standards set by the Advanced Television Systems Committee (ATSC). Wherein the event information table is information for providing each event in the electronic program guide in time sequence, the event information is distinguished by a packet identifier (packet identifier, PID), and the electronic program guide is composed by the event information of a period of time before and after.
For example, the digital television signal 21 is received and processed (e.g. demultiplexed, decoded, etc.) by the circuit system 20, and the formed digital television information is broadcast by the digital television, and an electronic program guide created by the package identifier is also provided, and by displaying the digital television signal on a television screen or a specific display interface, the digital television signal is provided for a user to refer to, and the user can learn the content such as the time period, the content profile, etc. of the television program through the electronic program guide, and select the program of interest from the digital television signal, or can perform the pre-recording setting.
In the method for acquiring program information disclosed by the invention, the video and audio content to be processed is digitized to form data bits, and the transmission packets are required to conform to the format of a designated transmission protocol, such as the MPEG-2 Transmission Stream (TS) standard supported by the system, so that the digital data of the standard is cut into a plurality of fixed-length transmission stream packets (TS packets), each packet is connected with a related data stream (data stream) through the Packet Identifier (PID), and each packet identifier corresponds to the video and audio stream in the digital television signal.
Furthermore, the packet identifier(s) is (are) used to identify packets carrying a service information (Service Information, SI) and electronic program guide data, and the MPEG-2 Transport Stream (TS) comprises, in addition to the service information, a program specific information (Program Specific Information, PSI) having several tables (tables) therein, including: program association table (Program Association Table, PAT), program map table (Program Map Table, PMT), network information table (Network Information Table, NIT), and conditional access table (Condition Access Table, CAT), each containing information required for decoding and reproducing a program, constituting an Electronic Program Guide (EPG). It is known that the transport stream packets of digital television signals carry the contents of an electronic program guide, one of which is to find programs and streams to be decompressed, and that the circuitry in the digital television set needs to pass these tables to obtain the program information.
The electronic program guide provides a simple, easy and quick way for television users to obtain television channel content and program introduction, and can provide classification functions besides the user browsing programs, so that the user can browse and select various types of television programs, and a television system (such as a television and a system formed by a built-in or external set top box) can preset the television programs to be watched or recorded through the design of the electronic program guide.
For example, the basic Packet Identifier (PID) in the program and system information protocol adopted by the Advanced Television Systems Committee (ATSC) is "0x1FFB". Therefore, when decoding first, it is necessary to find the packet identifier with the identifier "0x1FFB", and then find the corresponding table (various tables as mentioned in the above embodiments) for the various table identifiers (table IDs), and parse the table identifiers. For example, a table identifier of a Main Guide Table (MGT) which mainly records respective channel information (channel information), such as video and audio of respective programs, an Event Information Table (EIT) or an Extended Text Table (ETT), is "0xC 7". Because each table has a corresponding table identifier, after the system analyzes the main guide table, the system analyzes the other table identifiers in the main guide table again, and repeatedly operates to obtain the required information content.
Taking program information as an example, according to user selection, instructions in the circuit system find corresponding program information (e.g., program one) in the program mapping table, for example, the corresponding packet identifier of the program one is 22 (pid=22), and then find all packets of pid=22 to the Transport Stream (TS), so as to download the corresponding digital television stream; when searching for program two, the packet identifier 40 (pid=40) is obtained from the program mapping table, and all packets with pid=40 are also found in the transport stream, and the packet stream with pid=40 is carried to the video decoder.
According to the embodiment of the method and the circuit system for acquiring program information, in order to avoid the overload of the circuit in the prior art on frequent polling (polling), the proposed method adopts a dynamic packet identifier filtering mechanism (dynamic PID filter) for hardware specifications, so that the use of the known packet identifiers can be effectively reduced, and the electronic program guide in a time can be acquired at the same time, and because the grammar analysis and polling steps in the process are preferably performed in the circuit system by a background program operation, that is, the processor and related circuits in the circuit system can execute grammar analysis and polling in the background according to a schedule or when the circuit is idle, the circuit system can acquire the data of the electronic program guide more quickly and respond to the selection of a user more quickly.
The dynamic packet identifier filtering mechanism is implemented in software, firmware or hardware as a dynamic packet identifier controller (dynamic PID controller) that may be provided in a processor of circuitry, and an embodiment diagram may refer to fig. 3, which shows a processor 201 as described in fig. 2, including a dynamic packet identifier controller 300 implemented in firmware or circuitry.
According to the embodiment shown in the figure, there is shown a sequence of packet identifiers carried from a transport stream of a digital television signal, schematically as pid=0, 1,2,3, …, wherein the schematic representation is scanned through the entire sequence of packet identifiers with a filter (filter). The proposed implementation of the dynamic packet identifier controller 213 mainly uses a state machine (state machine) to record the state of the current scanning result, and particularly records a plurality of packet identifiers covered by the filtering window for filtering, and when the polling step of one group of packet identifiers covered by the current filtering window is completed, the action of dynamically transferring to another group of packet identifiers is performed, so that the packet identifiers and polling can be filtered according to different conditions to obtain the corresponding program information. It is mentioned here that the state machine is a transfer action (transition action) to record an entry action (entry action) started by the filter in running, an exit action (exit action) to complete the polling at this stage, an input action (input action) to prepare for the next filtering, and a dynamic transfer to the next set of packet identifiers. The number of packet identifiers filtered at one time by the filter window is determined according to a set value, which may be set by a user according to the requirement or the system according to the hardware operation capability.
In this example, the packet identifiers (pid=0, 1) are filtered out of the whole sequence with a fixed packet identifier filter (fixed PID filter), pid=0 representing the currently filtered packet identifier and pid=1 representing the next filtered packet identifier, these two fixed packet identifiers 30 being used to identify the above specific information and thus being derived by a fixed packet identifier filter, the subsequent packet identifiers being swept with a dynamic packet identifier filter (dynamic PID filter). This example shows the dynamic packet identifier filter forming a first set of packet identifiers 32 covered by a filter window according to the settings, performing a first scan, i.e. performing a poll based on the sequence of packet identifiers to obtain program information corresponding to each packet identifier, this example shows obtaining data for a plurality (e.g. 3) of packet identifiers (pid=2, 3, 4). When the program information corresponding to each packet identifier in the filter window is obtained according to the filter window polling, the filter window is moved to the second group of packet identifiers 32' to perform polling to obtain the program information corresponding to each packet identifier, which is shown in the example to obtain the data of a plurality of packet identifiers (pid=5, 6, 7). By means of dynamic packet identifier filtering, the system side can be prevented from increasing load due to frequent polling. After the polling operation of all the packet identifiers is completed through the dynamic moving filter window, an electronic program guide is formed and stored in a memory in the circuit system, so that a user can conveniently select to browse the program information in the electronic program guide.
Fig. 4 is a flowchart of an embodiment of a method for acquiring program information, which is implemented in circuitry, and the implemented method initially acquires a Main Guide Table (MGT) from a transport stream of a digital television signal (step S401), where the main guide table may be the electronic program guide server 11 shown in fig. 1, and the main guide table is the most dominant electronic program guide data and is also the main source for acquiring program information by the circuitry. To obtain the program information in the transport stream, the main process continues to perform syntax analysis (burst), and extracts the sequence packet identifiers (step S403), so as to form a list of packet identifiers, as shown in fig. 3, an Event Information Table (EIT) or an Extended Text Table (ETT) for providing each event information in the electronic program guide in time sequence may be formed (step S405), and the event information or the extended text table is distinguished by the Packet Identifiers (PIDs), so that the program information, such as the electronic program guide, can be obtained by polling according to the obtained packet identifiers.
Then, in the process of polling (polling) the program information, the packet identifier filter in the circuit system is started (step S407), the filtering parameters are set according to the state of the hardware, such as setting the filtering window (step S409), dynamic filtering is performed in a manner of dynamically moving the filtering window according to the set filtering window (step S411), the current state can be recorded by the state machine in the process, and the program information corresponding to each packet identifier is acquired one by one along with the list of packet identifiers (step S413). After completion, the parameters of the filter are reset (step S415).
It should be noted that, when parsing is performed, if a version change is found in the main guide table, the main guide table is updated first, and then the parsing and obtaining of the packet identifier are continued. Further, the data is updated when the version of the main guide table is changed, and if a system set time is reached, such as a new content is generated at a fixed time, the new program information is indicated or the main guide table is changed, so that the main guide table is updated.
In summary, the proposed method for acquiring program information can reduce the usage of the packet identifier required by hardware at one time by using the dynamic packet identifier filtering mechanism, and can acquire the information of all electronic program guides at the same time, so that the proposed method can still acquire the electronic program guide with enough content (such as 7 days) under the condition of saving the hardware cost. Under the experience of a user, as the program for acquiring the program information through grammar analysis and polling can operate in the background, the program information can be collected faster, and when the user enters an electronic program guide to click a certain program information, the program information can be displayed faster, so that the viewing experience of the user is more met.
The above disclosure is only of the preferred embodiments of the present invention and is not intended to limit the scope of the claims, so that all equivalent technical changes made by the specification and drawings of the present invention are included in the scope of the claims.
Reference numerals illustrate:
digital television signal 11
First multiplexer 101
Program and system information protocol unit 103
Second multiplexer 105
Modulator 107
Transmitter 109
Digital television signal 21
Digital television tuner 207
Digital television demodulator 208
Circuitry 20
Processor 201
Demultiplexer 202
Decoder 203
Program information database 205
Video 22
Audio 23
Fixed packet identifier 30
First group package identifier 32
Second group packet identifier 32'
Dynamic packet identifier controller 300
Steps S401 to S415 are a flow of the electronic program guide forming method.
Claims (9)
1. A method for obtaining program information, applied in a circuit system, comprising:
obtaining a main guide table from a transport stream of a digital television signal;
performing syntax analysis on the main guide table to form an event information table or an extended text table for providing each event information in the electronic program guide in time sequence, and taking out a sequence packet identifier; and
and executing polling according to the sequence packet identifiers to obtain program information corresponding to each packet identifier, wherein in the polling step, the program information corresponding to each packet identifier in the filtering window is obtained through polling according to the filtering window sweeping one group of packet identifiers at a time, and after the completion, the filtering window is moved to another group of packet identifiers to carry out polling to obtain the program information corresponding to each packet identifier, so as to form an electronic program guide.
2. The method for retrieving program information as recited in claim 1, wherein a number of packet identifiers filtered at a time by said filter window is determined according to a set value.
3. The method of acquiring program information according to claim 2, wherein the state of the filter window is recorded with a state machine each time program information corresponding to the plurality of packet identifiers covered is acquired according to the filter window poll.
4. The method for retrieving program information as in claim 3, wherein the step of implementing a dynamic packet identifier controller with the in-circuit processor, performing polling to obtain program information corresponding to each packet identifier in the filter window, and moving the filter window.
5. The method of acquiring program information according to any one of claims 1 to 4, wherein, at the time of the parsing step, if a change is found in the main guide table or a set time is reached, the main guide table is updated, and then the parsing and the acquisition of the package identifier are continued.
6. The method for retrieving program information as recited in claim 5, wherein the master guide table is retrieved from an electronic program guide server.
7. The method for retrieving program information as in claim 5, wherein said parsing and polling steps operate in a background program in said circuitry.
8. Circuitry, disposed in a digital television system, comprising:
a processor and a memory;
wherein the method for acquiring the program information is executed by the processor and comprises the following steps:
obtaining a main guide table from a transport stream of a digital television signal;
performing syntax analysis on the main guide table to form an event information table or an extended text table for providing each event information in the electronic program guide in time sequence, and taking out a sequence packet identifier; and
and executing polling according to the sequence packet identifiers to obtain program information corresponding to each packet identifier, wherein in the polling step, the program information corresponding to each packet identifier in the filtering window is obtained through polling according to the filtering window sweeping one group of packet identifiers at a time, and after the completion, the filtering window is moved to another group of packet identifiers to carry out polling to obtain the program information corresponding to each packet identifier, so as to form an electronic program guide.
9. The circuitry of claim 8, wherein the dynamic packet identifier controller is implemented with a processor in the circuitry, performing polling to derive program information corresponding to each packet identifier in the filter window, and moving the filter window.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006115398A (en) * | 2004-10-18 | 2006-04-27 | Matsushita Electric Ind Co Ltd | Transport stream processing apparatus |
| US7058965B1 (en) * | 1999-04-15 | 2006-06-06 | Sedna Patent Services, Llc | Multiplexing structures for delivery of interactive program guide |
| CN102263647A (en) * | 2010-05-31 | 2011-11-30 | 索尼公司 | Data filtering apparatus and data filtering method |
| CN103428533A (en) * | 2012-05-21 | 2013-12-04 | 索尼公司 | Devices and methods for dynamic broadcast |
| CN109672924A (en) * | 2018-12-27 | 2019-04-23 | 深圳创维－Rgb电子有限公司 | Generation method, device and the computer readable storage medium of electronic program guides |
Family Cites Families (3)
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| US8782705B2 (en) * | 2000-04-17 | 2014-07-15 | Lg Electronics Inc. | Information descriptor and extended information descriptor data structures for digital television signals |
| US7124424B2 (en) * | 2000-11-27 | 2006-10-17 | Sedna Patent Services, Llc | Method and apparatus for providing interactive program guide (IPG) and video-on-demand (VOD) user interfaces |
| US10958948B2 (en) * | 2017-08-29 | 2021-03-23 | Charter Communications Operating, Llc | Apparatus and methods for latency reduction in digital content switching operations |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7058965B1 (en) * | 1999-04-15 | 2006-06-06 | Sedna Patent Services, Llc | Multiplexing structures for delivery of interactive program guide |
| JP2006115398A (en) * | 2004-10-18 | 2006-04-27 | Matsushita Electric Ind Co Ltd | Transport stream processing apparatus |
| CN102263647A (en) * | 2010-05-31 | 2011-11-30 | 索尼公司 | Data filtering apparatus and data filtering method |
| CN103428533A (en) * | 2012-05-21 | 2013-12-04 | 索尼公司 | Devices and methods for dynamic broadcast |
| CN109672924A (en) * | 2018-12-27 | 2019-04-23 | 深圳创维－Rgb电子有限公司 | Generation method, device and the computer readable storage medium of electronic program guides |
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