CN114598756B - ALP data packet processing method, storage medium and electronic equipment - Google Patents
ALP data packet processing method, storage medium and electronic equipment Download PDFInfo
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- CN114598756B CN114598756B CN202011381837.7A CN202011381837A CN114598756B CN 114598756 B CN114598756 B CN 114598756B CN 202011381837 A CN202011381837 A CN 202011381837A CN 114598756 B CN114598756 B CN 114598756B
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- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000005538 encapsulation Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 9
- 230000006872 improvement Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
- H04L69/324—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions in the data link layer [OSI layer 2], e.g. HDLC
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
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- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a processing method of an ALP data packet, a storage medium and electronic equipment, wherein the method comprises the following steps: receiving an ALP data packet sent by a demodulator, wherein the ALP data packet comprises a plurality of data segments; each time a data segment of an ALP packet is received, the data segment is processed. The invention directly outputs the ALP data packet with variable length in full stream through the demodulator without the need of TS stream encapsulation conversion by the decoder and the process of reducing the ALP packet by the SOC chip spliced TS stream, thereby improving the system operation efficiency, improving the reliability of the ALP data and reducing the occupied system operation resources.
Description
Technical Field
The present invention relates to the field of digital television technologies, and in particular, to a method for processing an ALP packet, a storage medium, and an electronic device.
Background
The ATSC3.0 standard is a new generation terrestrial digital television broadcasting system in the united states, and the ATSC3.0 standard is a layered structure, and defines standards of physical layer, transport layer, application layer, and security layer, respectively. ATSC3.0 is a digital television broadcasting system currently the most advanced, and will be widely used in the future in the united states, korea, canada, etc., particularly in the north america countries and regions.
ATSC3.0 describes a format conversion process of an ALP in a Link layer Protocol a330, where the ALP is an abbreviation of ATSC Link-layer Protocol, and the ALP encapsulates different types of input data into a unified ALP format, and the ALP packet length is not fixed, and then is transferred to a physical layer for channel coding and modulation output. For the ATSC3.0 receiving end, the radio frequency signal of the ATSC3.0 is converted into a low intermediate frequency signal through a high frequency head, then the low intermediate frequency signal is subjected to channel demodulation and channel decoding through a demod chip, and then the demod outputs ALP data to a demux of the SOC for processing.
As shown in fig. 1 and 2, in the current processing method, demod output ALP data is firstly converted into a fixed-length 188-byte TS stream, and then added with a header code of 0x47, and output according to the TS stream encapsulation. Then the SOC receiving end receives the TS stream, removes the head code of the TS stream, and then converts the TS stream into ALP package packaged data through software algorithm splicing. Therefore, the method not only occupies a lot of resources of the CPU and affects the running efficiency of the system, but also causes mosaic of pictures because ALP has no checking mechanism and is easy to make mistakes in the process of software splicing.
There is thus a need for improvements and improvements in the art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a processing method of ALP data packets, a storage medium and electronic equipment, thereby improving the transmission efficiency and reliability of ALP and reducing the occupation of system operation resources.
The technical scheme adopted by the invention is as follows:
in a first aspect, an embodiment of the present invention provides a method for processing an ALP packet, where the method includes:
receiving an ALP data packet sent by a demodulator, wherein the ALP data packet comprises a plurality of data segments;
each time a data segment of an ALP packet is received, the data segment is processed.
As a further improved technical solution, the ALP packet sent by the receiving demodulator specifically includes: and receiving ALP data packets sent by the demodulator through full stream, and storing the ALP data packets in a buffer area.
As a further improvement, the step of receiving a data segment of the ALP packet each time specifically includes:
determining a header code and an end packet of the ALP data packet;
and extracting data between the header and the end packet, and taking the data as a data segment.
As a further improved technical solution, the determining the header and the end packet of the ALP packet specifically includes:
identifying and identifying a header of the ALP packet by a sync signal;
and identifying the end packet of the ALP data packet through a valid signal.
As a further improvement, the header code for identifying and identifying the ALP packet by the sync signal specifically includes:
identifying a 1 st data bit of the ALP data packet and adding preset data to the 1 st data bit when the sync signal is detected to be changed from a low level to a high level;
and taking the preset data as a header code.
As a further improved technical solution, the identifying, by valid signal, the end packet of the ALP packet specifically includes:
when the valid signal is detected to be changed from a high level to a low level, an end packet of the ALP data packet is determined.
As a further improvement technical scheme, the processing the data segment specifically includes:
the one data segment is passed to a decomposer for processing.
As a further improvement, each time a data segment of the ALP packet is received, the processing of the data segment further includes:
and clearing the data stored in the buffer area.
In a second aspect, embodiments of the present invention provide a computer readable storage medium storing one or more programs executable by one or more processors to implement steps in the method for processing an ALP packet as described in any one of the above.
In a third aspect, an embodiment of the present invention provides an electronic device, including: an SOC chip, the SOC chip comprising: a processor and a memory; the memory has stored thereon a computer readable program executable by the processor; the steps in the method for processing an ALP packet according to any one of the above are implemented when the processor executes the computer readable program.
The beneficial effects are that: compared with the prior art, the invention provides a processing method of an ALP data packet, a storage medium and electronic equipment, wherein the method comprises the following steps: receiving an ALP data packet sent by a demodulator, wherein the ALP data packet comprises a plurality of data segments; each time a data segment of an ALP packet is received, the data segment is processed. The invention directly outputs the ALP data packet with variable length in full stream through the demodulator without the need of TS stream encapsulation conversion by the decoder and the process of reducing the ALP packet by the SOC chip spliced TS stream, thereby improving the system operation efficiency, improving the reliability of the ALP data and reducing the occupied system operation resources.
Drawings
Fig. 1 is a schematic diagram of a Demod output converting ALP into TS stream packets in the prior art.
Fig. 2 is a schematic diagram of the SOC input splicing TS packets into ALP data in the prior art.
Fig. 3 is a flowchart of a processing method of an ALP packet provided in the present invention.
Fig. 4 is a schematic diagram of an ALP packet processing system according to the present invention.
Fig. 5 is a schematic diagram of full stream output and reception of an ALP packet provided in the present invention.
Fig. 6 is an ALP waveform diagram of the demodulator output provided by the present invention.
Fig. 7 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
The invention provides a processing method of ALP data packets, a storage medium and electronic equipment, and in order to make the purposes, technical schemes and effects of the invention clearer and more definite, the invention is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. The term "and/or" as used herein includes all or any element and all combination of one or more of the associated listed items.
It will be understood by those skilled in the art that all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs unless defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The ATSC3.0 standard is a new generation terrestrial digital television broadcasting system in the united states, and the ATSC3.0 standard is a layered structure, and defines standards of physical layer, transport layer, application layer, and security layer, respectively. ATSC3.0 is a digital television broadcasting system currently the most advanced, and will be widely used in the future in the united states, korea, canada, etc., particularly in the north america countries and regions.
ATSC3.0 describes a format conversion process of an ALP in a Link layer Protocol a330, the ALP is an abbreviation of ATSC Link-layer Protocol, and the ALP encapsulates different types of input data into a unified ALP format, and the length of an ALP packet is not fixed, and then the ALP packet is transferred to a physical layer for channel coding and modulation output. For the ATSC3.0 receiving end, the radio frequency signal of the ATSC3.0 is converted into a low intermediate frequency signal through a high frequency head, then the low intermediate frequency signal is subjected to channel demodulation and channel decoding through a demod chip, and then the demod outputs ALP data to a demux of the SOC for processing.
As shown in fig. 1 and 2, the current processing method is that Demod output ALP data is firstly converted into a Transport Stream (TS Stream) with a fixed length of 188 bytes, the Transport Stream with a fixed packet length of 188 bytes is a data Stream defined according to ITU-T rec.h.222.0|iso/IEC 13818-2 and ISO/IEC13818-3 protocols, and one or more program code data is prevented from being transmitted and stored when serious errors are likely to occur), and then the data is output according to a TS Stream package by adding a header of 0x 47. Then the SOC receiving end receives the TS stream, removes the head code of the TS stream, and then converts the TS stream into ALP package packaged data through software algorithm splicing. Therefore, the method not only occupies a lot of resources of the CPU and affects the running efficiency of the system, but also causes mosaic of pictures because ALP has no checking mechanism and is easy to make mistakes in the process of software splicing.
In order to solve the above problem, in an embodiment of the present application, an ALP packet sent by a demodulator is received, where the ALP packet includes a plurality of data segments; each time a data segment of an ALP packet is received, the data segment is processed. The invention directly outputs the ALP data packet with variable length in full stream through the demodulator without the need of TS stream encapsulation conversion by the decoder and the process of reducing the ALP packet by the SOC chip spliced TS stream, thereby improving the system operation efficiency, improving the reliability of the ALP data and reducing the occupied system operation resources.
The invention will be further described by the description of embodiments with reference to the accompanying drawings.
The embodiment provides a method for processing an ALP data packet, as shown in fig. 3, where the method includes:
s100, receiving an ALP data packet sent by a demodulator, wherein the ALP data packet comprises a plurality of data segments.
In this embodiment, the output of the demodulator ALP packet is output according to the ALP full stream with variable length, and the processing method of the ALP packet is based on the processing system of the ALP packet, as shown in fig. 4, the system is composed of a Tuner, a Demod and an SOC chip, where the Tuner is used to implement the frequency down-converting of the ATSC3.0 radio frequency signal from a high frequency signal to a low intermediate frequency signal, and then the Tuner outputs the IF signal to the Demod.
Further, the Demod function is to channel demodulate and channel decode the ATSC3.0 signal, producing an ALP signal. The ALP signal output by Demod has ALP data and valid, clk, sync, and in practical applications, ALP is divided into parallel data and serial data, and if parallel data is provided, the ALP signal has 8 data signal lines, and if serial data is provided, the ALP signal has only 1 data signal line. Demod is available in two output modes, one of which is the original ALP full stream data output, the data length being variable; another mode is the output of TS packets converted to 188 bytes in length. In this embodiment, demod needs to output the first mode, for example, fig. 5 is a schematic diagram of full stream output and receiving of an ALP packet provided in the present invention.
Further, the SOC chip includes a CPU (central processing unit), buffer, demux (resolver) inside. In this embodiment, the SOC chip receives the ALP packet sent by the demodulator in full stream. Thus, full stream output and reception of ALP can be realized by the above method without converting into TS packets. Therefore, the invention avoids the complex process of converting TS stream first and then splicing and restoring ALP by the ALP full stream output and receiving, thereby improving the transmission efficiency and reliability of ALP, reducing the occupied system operation resource and improving the operation efficiency of the system.
In practical application, the ALP data packet sent by the receiving demodulator specifically includes: and receiving ALP data packets sent by the demodulator in a full stream, and storing the ALP data packets in a buffer area so that a CPU can transfer a complete ALP data packet (data segment) extracted in the subsequent step to a Demux for processing.
S200, each time a data segment of an ALP packet is received, the data segment is processed.
Specifically, as shown in fig. 6, fig. 6 is an ALP waveform diagram of the demodulator output provided by the present invention. As can be seen from fig. 6, the alplk signal is a reference clock for collecting ALPDATA, that is, the signal of ALPDATA is collected when alplk rises; the ALPVALID signal high represents valid data of ALPDATA, and the low level represents invalid data; the ALPSYNC signal represents the synchronization data of each ALP packet, wherein the ALPDATA data aligned with the rising edge of the ALPSYNC signal is the header, i.e., the first data bit, of the ALP packet. Correspondingly, each time a data segment of the ALP packet is received, the method specifically includes:
s201, determining a header code and an end packet of the ALP data packet;
in this embodiment, a complete ALP packet (data segment) may be determined according to the header and the end packet of the ALP packet output by the full stream, and correspondingly, the determining the header and the end packet of the ALP packet specifically includes:
s2011, identifying and identifying the header of the ALP data packet through a sync signal;
s2012, identifying the end packet of the ALP data packet through a valid signal.
Specifically, the header code that identifies and identifies the ALP packet by the sync signal is specifically: identifying a 1 st data bit of the ALP data packet and adding preset data to the 1 st data bit when the sync signal is detected to be changed from a low level to a high level; taking the preset data as a header code; the identifying the end packet of the ALP packet by valid signal specifically includes: when the valid signal is detected to be changed from a high level to a low level, an end packet of the ALP data packet is determined. In this embodiment, the valid and sync signal lines of the ALP are connected to two GPIOs of the CPU at the same time, and of course, in practical application, a scheme in which the valid and sync signal lines of the ALP are connected to the same GPIOs of the CPU at the same time is also included.
S202, extracting data between the header and the end packet, and taking the data as a data segment.
Specifically, when the ALPDATA of Demod enters buffer, and when the CPU detects that the sync signal of the ALP of GPIO2 changes from low level to high level, then it is recognized that the corresponding ALP data is the 1 st data bit at this time, and by adding a specific data bit as a header, for example, the header is 0xAA; then when the CPU detects that the valid signal of the ALP of the GPIO1 is changed from high level to low level, the ALP data packet is identified to be ended, a complete ALP data packet is cached in a buffer, and then the CPU transfers the complete ALP data packet of the buffer to a Demux for processing. And so on, the next ALP packet is received. By the method, the full stream output and the full stream receiving of the ALP can be realized without converting the ALP into TS stream. Therefore, through ALP full stream output and receiving, the prior TS stream transfer and the complex process of splicing and restoring ALP in the original method are avoided, so that the transmission efficiency and reliability of the ALP are improved, the occupied system operation resources are reduced, and the operation efficiency of the system is improved.
In practical application, each time a data segment of the ALP packet is received, the processing of the data segment further includes: and clearing the data stored in the buffer area. Thus, when the buffer area receives the 1 st data bit, namely the header of the next complete ALP data packet, the next complete ALP data packet can be conveniently and accurately obtained, and then the packet is transmitted to the Demux for processing.
In summary, the present invention discloses a method for processing an ALP packet, which includes: receiving an ALP data packet sent by a demodulator, wherein the ALP data packet comprises a plurality of data segments; each time a data segment of an ALP packet is received, the data segment is processed. The invention directly outputs the ALP data packet with variable length in full stream through the demodulator without the need of TS stream encapsulation conversion by the decoder and the process of reducing the ALP packet by the SOC chip spliced TS stream, thereby improving the system operation efficiency, improving the reliability of the ALP data and reducing the occupied system operation resources.
Based on the above-mentioned method for processing an ALP packet, the present invention also provides a computer readable storage medium storing one or more programs executable by one or more processors to implement the steps in the method for processing an ALP packet according to the above-mentioned embodiments.
Based on the above-mentioned ALP packet processing method, the present invention further provides an electronic device, which includes an SOC chip, as shown in fig. 7, where the device 100 includes a processor 11 and a memory 22 connected to the processor 11, and fig. 7 only shows some components of the device 100, but it should be understood that not all the shown components are required to be implemented, and more or fewer components may be implemented instead.
The memory 22 may in some embodiments be an internal storage unit of the device 100, such as a memory of the device 100. The memory 22 may in other embodiments also be an external storage device of the device 100, such as a plug-in type usb Flash drive, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the device 100. Further, the memory 22 may also include both internal and external storage units of the device 100. The memory 22 is used for storing application software installed in the device 100 and various types of data, such as the processing program codes of the ALP packets. The memory 22 may also be used to temporarily store data that has been output or is to be output. In one embodiment, the memory 22 stores an ALP packet processing program, and the ALP packet processing program may be executed by the processor 11, so as to implement the ALP packet processing method in the present application, which is specifically described in the above method.
The processor 11 may be, in some embodiments, a central processing unit (Central Processing Unit, CPU), microprocessor, mobile phone baseband processor or other data processing chip for running the program code or processing data stored in the memory 22, for example, executing the ALP packet processing method, etc., as described in the above method.
It will be appreciated by those skilled in the art that the block diagram of fig. 7 is merely a partial structure related to the present application and does not constitute a limitation of the computer device to which the present application is applied, and that a specific device may include more or less components than those shown in the drawings, or may combine certain components, or have a different arrangement of components. The steps of the above-mentioned ALP packet processing method are implemented when the processor executes the computer program, specifically as described above.
Of course, those skilled in the art will appreciate that implementing all or part of the above-described methods may be implemented by a computer program for instructing relevant hardware (e.g., a processor, a controller, etc.), where the program may be stored in a computer-readable storage medium, and where the program may include the steps of the above-described method embodiments when executed. The storage medium may be a memory, a magnetic disk, an optical disk, or the like.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (8)
1. A method for processing an ALP packet, the method comprising:
receiving an ALP data packet sent by a demodulator, wherein the ALP data packet comprises a plurality of data segments;
processing a data segment of an ALP data packet whenever the data segment is received;
the step of receiving a data segment of the ALP data packet each time specifically comprises:
determining a header code and an end packet of the ALP data packet;
extracting data between the header and the end packet, and taking the data as a data segment;
the determining the header code and the end packet of the ALP data packet specifically includes:
identifying and identifying a header of the ALP packet by a sync signal;
and identifying the end packet of the ALP data packet through a valid signal.
2. The method for processing an ALP packet according to claim 1, wherein the ALP packet transmitted by the receiving demodulator is specifically:
and receiving ALP data packets sent by the demodulator through full stream, and storing the ALP data packets in a buffer area.
3. The method for processing an ALP packet according to claim 1, wherein the header code for identifying and identifying the ALP packet by the sync signal is specifically:
identifying a 1 st data bit of the ALP data packet and adding preset data to the 1 st data bit when the sync signal is detected to be changed from a low level to a high level;
and taking the preset data as a header code.
4. The method for processing an ALP packet according to claim 1, wherein the identifying the end packet of the ALP packet by the valid signal is specifically:
when the valid signal is detected to be changed from a high level to a low level, an end packet of the ALP data packet is determined.
5. The method for processing an ALP packet according to claim 2, wherein the processing the data segment specifically comprises:
the one data segment is passed to a decomposer for processing.
6. The method according to claim 2, wherein each time a data segment of the ALP packet is received, the processing of the data segment further comprises:
and clearing the data stored in the buffer area.
7. A computer readable storage medium storing one or more programs executable by one or more processors to implement the steps in the method of processing ALP packets as recited in any one of claims 1-6.
8. An electronic device, comprising: an SOC chip, the SOC chip comprising: a processor and a memory; the memory has stored thereon a computer readable program executable by the processor; the steps in the method for processing ALP packets according to any one of claims 1 to 6 are implemented when the processor executes the computer readable program.
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| CN202011381837.7A CN114598756B (en) | 2020-12-01 | 2020-12-01 | ALP data packet processing method, storage medium and electronic equipment |
| PCT/CN2021/130877 WO2022116810A1 (en) | 2020-12-01 | 2021-11-16 | Alp data packet processing method, storage medium, and electronic device |
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| CN101924930A (en) * | 2010-02-09 | 2010-12-22 | 清华大学 | Method for transmitting data by using DSM-CC protocol |
| CN102301701A (en) * | 2009-02-02 | 2011-12-28 | Lg电子株式会社 | Transmitting/receiving System And Method Of Processing Data In The Transmitting/receiving System |
| CN108432261A (en) * | 2016-01-08 | 2018-08-21 | 高通股份有限公司 | Determine that the media for media transmission transmit event location |
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| US6449002B1 (en) * | 1999-12-21 | 2002-09-10 | Thomson Licensing S.A. | Truncated metric for NTSC interference rejection in the ATSC-HDTV trellis decoder |
| MY151620A (en) * | 2005-10-11 | 2014-06-30 | Samsung Electronics Co Ltd | Method for turbo transmission of digital broadcasting transport stream, a digital broadcasting transmission and reception system, and a signal processing method thereof |
| US9489525B2 (en) * | 2014-07-24 | 2016-11-08 | International Business Machines Corporation | Secure storage system |
| CN105872779A (en) * | 2016-04-20 | 2016-08-17 | 上海清鹤科技股份有限公司 | Telecommunication clear stream acquiring software for Qinghe digital television head end |
| CN110401805A (en) * | 2018-04-16 | 2019-11-01 | 晨星半导体股份有限公司 | Receiver and relevant signal processing method |
| JP2019216368A (en) * | 2018-06-13 | 2019-12-19 | ソニーセミコンダクタソリューションズ株式会社 | Demodulator circuit, processing method, and processing apparatus |
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| CN102301701A (en) * | 2009-02-02 | 2011-12-28 | Lg电子株式会社 | Transmitting/receiving System And Method Of Processing Data In The Transmitting/receiving System |
| CN101924930A (en) * | 2010-02-09 | 2010-12-22 | 清华大学 | Method for transmitting data by using DSM-CC protocol |
| CN108432261A (en) * | 2016-01-08 | 2018-08-21 | 高通股份有限公司 | Determine that the media for media transmission transmit event location |
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