CN103596035A - System and method for recording DVB code stream through digital set top box - Google Patents
System and method for recording DVB code stream through digital set top box Download PDFInfo
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- CN103596035A CN103596035A CN201310539874.XA CN201310539874A CN103596035A CN 103596035 A CN103596035 A CN 103596035A CN 201310539874 A CN201310539874 A CN 201310539874A CN 103596035 A CN103596035 A CN 103596035A
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Abstract
The invention discloses a system and method for recording a DVB code stream through a digital set top box. The system comprises a control PC and the digital set top box. The control PC is mainly composed of a recording control module and used for generating a recording control order, sending the recording control order to the digital set top box through an RS-232 interface and receiving and processing data and information which are fed back by the digital set top box. A code stream recording/transmission module is arranged in the digital set top box. The code stream recording/transmission module is mainly composed of a signal demodulation module, an SDRAM, a FLASH, a Tuner, an Ethernet interface chip, a USB interface, an RS-232 interface and an audio-video interface. Compared with an existing system, the system has the advantages that the functions of the digital set top box are expanded, a DVB code stream recording approach is low in cost, practical and convenient to use, a user can collect and store favorite programs conveniently, and a real-time off-line code stream analysis condition is offered to a professional.
Description
Technical field
The present invention relates to a kind of digital television techniques field, relate in particular to a kind of system and method that utilizes top box of digital machine to record DVB code stream.
Background technology
Along with digital television techniques is day by day ripe, Digital Cable Television System from front end program coding, multiplexing, be modulated to the links such as terminal top box of digital machine and formed a complicated DVB bit stream system.The information such as original digital picture, audio frequency and video are processed and formation DVB transmission code stream through coding or packing, critical data field in DVB transmission code stream must be accurate, to guarantee that top box of digital machine terminal can correctly receive, otherwise can directly have influence on the transmission quality of Digital Cable Television System.Once DVB transmission code stream goes wrong, will affect user uses top box of digital machine to watch program, now, need to carry out analyzing and testing to DVB transmission code stream, comprising analyzing TS pack arrangement, TS bag size, PSI/SI table information, audio, video data, PCR shake, crc error and TS bag continuity counting etc., to correct the mistake in DVB transmission code stream.Therefore, obtaining original DVB transmission code stream how fast, easily just becomes to seem and is even more important.And the professional code stream analysis instrument of general use carries out recording of DVB transmission code stream and on-line analysis at present, these professional equipments are expensive, the long-range inconvenience of carrying, and need professional and technical personnel to operate.
Developing rapidly of top box of digital machine industry, makes top box of digital machine become indispensable multi-media information terminal in family, and towards future developments such as amphicheirality, low cost, multi-functional, multipurpose, many services.But at present except PVR top box of digital machine, common top box of digital machine does not have the function of recording TV program, the price comparison of PVR top box of digital machine is expensive, if can providing, ordinary numbers Set Top Box records the function of liking TV programme, the TV programme that user just can like oneself saves as the video file that can watch at any time, and be not subject to the restriction of specific reproduction time, for user has increased a kind of new functional experience.
Summary of the invention
Object of the present invention is just to have solved the problems referred to above, provides a kind of quick, practical, low-cost and utilize top box of digital machine to record the system and method for DVB code stream.
To achieve these goals, the technical solution used in the present invention is: a kind of system of utilizing top box of digital machine to record DVB code stream, comprise and control PC and top box of digital machine, described control PC is connected with top box of digital machine by RS-232 interface, described control PC mainly forms by recording control module, for generating, record control command, and control command is sent to top box of digital machine by RS-232 interface, and receive, process data and the information of top box of digital machine feedback, built-in stream-recording/the transport module of described top box of digital machine, stream-recording/transport module is mainly by signal demodulation module, SDRAM, FLASH, Tuner, Ethernet chip, USB interface, RS-232 interface and audio-video interface form, described SDRAM, FLASH, Tuner, Ethernet chip, USB interface, RS-232 interface, audio-video interface is electrically connected to signal demodulation module respectively,
As preferably, described top box of digital machine receives controls the control command of recording that PC sends over, according to command request, record the code stream of specifying frequency, and start the stream-recording module of top box of digital machine end, top box of digital machine demodulation TS data are out stored in SDRAM, start the bit stream module of top box of digital machine end simultaneously, according to command request, interface by Ethernet chip sends to the code stream of recording on code stream real time/off-line analysis PC, or by USB interface, the code stream of recording is sent in movable storage device;
As preferably, the described information such as control command comprises data recording type, records frequency, records size/selection of time, records size, recording time, transmission means, storing path, serial communication port of recording, wherein data recording type comprises original TS code stream and PSI/SI code stream, and wherein transmission means comprises Ethernet transmission, USB transmission;
As preferably, described signal demodulation module is mainly become with demodulation chipset by decoding chip;
Utilize top box of digital machine to record a method for DVB code stream, comprise that controlling PC records control flow and top box of digital machine stream-recording/transport module flow process,
Described control PC is recorded control flow, comprises the following steps,
Control command parameter is recorded in a, setting, by PC, hold and record the visualization interface of controlling software, the relevant control parameter of recording can be set, comprise data recording type, record frequency, record size/selection of time, record size, the information such as recording time, transmission means, storing path, serial communication port
Whether control command parameter is recorded in b, check, and the control command parameter of recording arranging is checked, wrong to judge the parameter of setting, if checked unsuccessfully, points out failure cause, and requires to re-start setting,
Control command is recorded in c, encapsulation, and will record control command parameter and encapsulate according to recording control command protocol requirement,
Whether normal d, detection RS-232 port, detect control end PC RS-232 port, and as Port detecting failure, point out failure cause, and require to re-start Port detecting,
Control command is recorded in e, transmission, and the control command of recording after encapsulation is sent to digital set-top box system by RS-232 interface,
F, recording state information receive and show, after recording control command and being sent, record and control the recording state information data that software starts to receive top box of digital machine end feedback, and show on visualization interface;
Described top box of digital machine stream-recording/transport module flow process, comprises the following steps,
A, control command are resolved, top box of digital machine termination is received after control command data, according to control command data protocol, resolve, controlled instruction related data information, comprising data recording type, record frequency, record size/selection of time, record size, the information such as recording time, transmission means, storing path
B, to recording frequency, carry out frequency modulation and demodulation, first the tuning demodulation module of top box of digital machine end signal will be recorded frequency and be tuned to intermediate-freuqncy signal, and this intermediate-freuqncy signal is passed to demodulation chip will carry out demodulation, to demodulate TS bag data,
C, startup are recorded and transmission task, and recording task completes recording of DVB code stream, and transmission task completes the transmission of DVB code stream, after recording and being sent completely, finishes respectively to record and transmission task.
Compared with prior art, the invention has the advantages that: a kind of system of utilizing top box of digital machine to record DVB code stream provided by the present invention, possessing on the basis of top box of digital machine basic function, expanded the function of top box of digital machine, a kind of low cost, practicality and DVB stream-recording approach are easily provided, not only can facilitate user to collect, preserve the program of oneself liking, also for professional and technical personnel provides in real time, off-line code stream analysis condition.
Accompanying drawing explanation
Fig. 1 is system construction drawing of the present invention;
Fig. 2 is that the present invention controls PC and records control flow chart.
Fig. 3 is top box of digital machine stream-recording/transfer process figure of the present invention.
Embodiment
Embodiment: a kind of system of utilizing top box of digital machine to record DVB code stream, possessing on the basis of top box of digital machine basic function, a kind of low cost, practicality and DVB stream-recording approach are easily provided, not only can facilitate user to collect, preserve the program of oneself liking, also for professional and technical personnel provides in real time, off-line analysis code stream has been created condition.The system of utilizing top box of digital machine to record DVB code stream to the present invention below in conjunction with accompanying drawing is elaborated.
System configuration of the present invention, as shown in Figure 1: native system mainly forms by controlling PC and top box of digital machine two parts, wherein controlling PC is connected with top box of digital machine by RS-232 interface, control PC and generate control command by the visual control software of recording is installed, and by RS-232 interface communication, control command is sent to digital set-top box system, by digital set-top box system, according to command request, carry out signal frequency modulation, demodulation, extract TS bag data, and carry out data filtering according to command request, then the TS bag data after filtering are stored in jumbo circulation Buffer, simultaneously, digital set-top box system log-on data sends task, from circulation Buffer, read TS bag data, both can TS be wrapped in the movable storage device that data are written to access by USB interface, also can TS be wrapped to data by Ethernet interface sends on code stream real time/off-line analysis PC.By the built-in stream-recording/transport module of top box of digital machine, possess stream-recording and sending function.Stream-recording module is responsible for recording code stream according to control command, and bit stream module is responsible for, according to control command, the code stream of recording is sent to intended target equipment.Stream-recording module and transport module are respectively by independent two task managements, and both,, by the common management cycle Buffer of read-write pointer, complete recording and sending of bit stream data efficiently.
Utilize top box of digital machine to record a method for DVB code stream, comprise that controlling PC records control flow and top box of digital machine stream-recording/transport module flow process,
Described control PC is recorded control flow, as shown in Figure 2, comprises the following steps:
1, arrange and record control command parameter.By PC, hold and record the visualization interface of controlling software, the relevant control parameter of recording can be set, comprise data recording type, record frequency, record size/selection of time, record size, the information such as recording time, transmission means, storing path, serial communication port, wherein data recording type comprises original TS code stream and PSI/SI code stream, and transmission means comprises Ethernet transmission and USB transmission.
2, check and record control command parameter.The control command parameter of recording arranging is checked, whether wrong to judge the parameter of setting, if checked unsuccessfully, point out failure cause, and require to re-start setting.
3, control command is recorded in encapsulation.To record control command parameter encapsulates according to recording control command protocol requirement.
4, detect RS-232 port.Whether normally detect control end PC RS-232 port, as Port detecting failure, point out failure cause, and require to re-start Port detecting.
5, send and record control command.The control command of recording after encapsulation is sent to digital set-top box system by RS-232 interface.
6, recording state information receives and shows.After recording control command and being sent, record and control the recording state information data that software starts to receive top box of digital machine end feedback, and show on visualization interface.
Described top box of digital machine end stream-recording/transport module flow process, as shown in Figure 3, comprises the following steps:
1, control command is resolved.Top box of digital machine termination is received after control command data, according to control command data protocol, resolve, controlled instruction related data information, comprising data recording type, record frequency, record size/selection of time, record size, the information such as recording time, transmission means, storing path.
2, to recording frequency, carry out frequency modulation and demodulation.First the tuning demodulation module of top box of digital machine end signal will be recorded frequency and be tuned to intermediate-freuqncy signal, and this intermediate-freuqncy signal is passed to demodulation chip will carry out demodulation, to demodulate TS bag data.
3, start and record and transmission task.Recording task completes recording of DVB code stream, and transmission task completes the transmission of DVB code stream, after recording and being sent completely, finishes respectively to record and transmission task.
Recording task comprises the following steps:
Step 1: extract TS data.Digital set-top box system is by DMUX module extract real-time TS initial data, and these original TS data comprise audio, video data, SI/PSI table data and private data.And can to the mistake in TS data, not check and repair.
Step 2: filter TS data.Digital set-top box system carries out TS data filtering according to data recording type, as is set to SI/PSI data, abandons non-SI/PSI data, as is RAW data, does not filter.
Step 3: TS data are deposited in circulation Buffer.When starting recording task, distribute a jumbo circulation Buffer, for storing TS data.This circulation Buffer controls respectively by reading and writing two pointers, and while writing TS data in circulation Buffer, write pointer moves according to the length writing.While reading TS data from circulation Buffer, read pointer moves according to the length of reading in.Thereby make the Buffer space of reading can continue again to write new TS data, to reach the effect recycling.
Step 4: whether judgement is recorded and completed.If employing is recorded size and is judged,, when TS data deposit circulation Buffer in, add up the size of all TS of depositing in data, and the size of recording that the total size of the TS data that deposit in and control command are set contrasts, if while being more than or equal to, being judged as and having recorded; If adopt recording time to judge, when starting to record, record system time at that time, while depositing TS data in, also record the current system time at every turn, two system times one subtract can obtain recording duration, the recording time that this is recorded to duration and control command setting contrasts, if be more than or equal to, be judged as and recorded.If recorded not yet, complete, continue circulation and extract TS data.
Step 5: finish to record.As recorded and finished immediately recording task, and will record sign and be set to effectively.
Transmission task comprises the following steps:
Step 1: connect with target device.Transmission task decides and adopts which kind of transmission means according to the transmission means of control command, if adopt USB transmission, in destination path, creates file; If adopt Ethernet transmission, set up sock with target device and be connected, and be ready for sending TS data.
Step 2: send TS data.Transmission task constantly reads TS data from circulation Buffer, and mobile circulation Buffer read pointer, can successively the data that read be written in file destination by USB interface, also can successively the data that read be sent on target P C machine by sock communication.
Step 3: whether judgement sends and complete.Only recording sign effectively, and writing the total size of TS data of circulation Buffer and the total equal and opposite in direction of TS data of reading from circulation Buffer, just thinking that TS data are sent completely.
Step 4: finish to send.As being sent completely, finish immediately transmission task, and will be sent completely sign and be set to effectively.
By a kind of system of utilizing top box of digital machine to record DVB code stream provided by the present invention, possessing on the basis of top box of digital machine basic function, expanded the function of top box of digital machine, a kind of low cost, practicality and DVB stream-recording approach are easily provided, not only can facilitate user to collect, preserve the program of oneself liking, also for professional and technical personnel provides in real time, off-line code stream analysis condition.
Above to a kind of system and method that utilizes top box of digital machine to record DVB code stream provided by the present invention, carried out detailed introduction, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to change of the present invention and improvement, will be possible, and can not exceed design and the scope of accessory claim defined, in sum, this description should not be construed as limitation of the present invention.
Claims (5)
1. a system of utilizing top box of digital machine to record DVB code stream, comprise and control PC and top box of digital machine, described control PC is connected with top box of digital machine by RS-232 interface, it is characterized in that: described control PC mainly forms by recording control module, for generating, record control command, and control command is sent to top box of digital machine by RS-232 interface, and receive, process data and the information of top box of digital machine feedback, built-in stream-recording/the transport module of described top box of digital machine, stream-recording/transport module is mainly by signal demodulation module, SDRAM, FLASH, Tuner, Ethernet chip, USB interface, RS-232 interface and audio-video interface form, described SDRAM, FLASH, Tuner, Ethernet chip, USB interface, RS-232 interface, audio-video interface is electrically connected to signal demodulation module respectively.
2. a kind of system of utilizing top box of digital machine to record DVB code stream according to claim 1, it is characterized in that: described top box of digital machine receives controls the control command of recording that PC sends over, according to command request, record the code stream of specifying frequency, and start the stream-recording module of top box of digital machine end, top box of digital machine demodulation TS data are out stored in SDRAM, start the bit stream module of top box of digital machine end simultaneously, according to command request, interface by Ethernet chip sends to the code stream of recording on code stream real time/off-line analysis PC, or by USB interface, the code stream of recording is sent in movable storage device.
3. a kind of system of utilizing top box of digital machine to record DVB code stream according to claim 2, it is characterized in that: described in record the information such as control command comprises data recording type, records frequency, records size/selection of time, records size, recording time, transmission means, storing path, serial communication port, wherein data recording type comprises original TS code stream and PSI/SI code stream, and wherein transmission means comprises Ethernet transmission, USB transmission.
4. a kind of system of utilizing top box of digital machine to record DVB code stream according to claim 1, is characterized in that: described signal demodulation module is mainly become with demodulation chipset by decoding chip.
5. a kind of method of utilizing top box of digital machine to record DVB code stream according to claim 1, is characterized in that: comprise that controlling PC records control flow and top box of digital machine stream-recording/transport module flow process,
Described control PC is recorded control flow, comprises the following steps,
Control command parameter is recorded in a, setting, by PC, hold and record the visualization interface of controlling software, the relevant control parameter of recording can be set, comprise data recording type, record frequency, record size/selection of time, record size, the information such as recording time, transmission means, storing path, serial communication port
Whether control command parameter is recorded in b, check, and the control command parameter of recording arranging is checked, wrong to judge the parameter of setting, if checked unsuccessfully, points out failure cause, and requires to re-start setting,
Control command is recorded in c, encapsulation, and will record control command parameter and encapsulate according to recording control command protocol requirement,
Whether normal d, detection RS-232 port, detect control end PC RS-232 port, and as Port detecting failure, point out failure cause, and require to re-start Port detecting,
Control command is recorded in e, transmission, and the control command of recording after encapsulation is sent to digital set-top box system by RS-232 interface,
F, recording state information receive and show, after recording control command and being sent, record and control the recording state information data that software starts to receive top box of digital machine end feedback, and show on visualization interface;
Described top box of digital machine stream-recording/transport module flow process, comprises the following steps,
A, control command are resolved, top box of digital machine termination is received after control command data, according to control command data protocol, resolve, controlled instruction related data information, comprising data recording type, record frequency, record size/selection of time, record size, the information such as recording time, transmission means, storing path
B, to recording frequency, carry out frequency modulation and demodulation, first the tuning demodulation module of top box of digital machine end signal will be recorded frequency and be tuned to intermediate-freuqncy signal, and this intermediate-freuqncy signal is passed to demodulation chip will carry out demodulation, to demodulate TS bag data,
C, startup are recorded and transmission task, and recording task completes recording of DVB code stream, and transmission task completes the transmission of DVB code stream, after recording and being sent completely, finishes respectively to record and transmission task.
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| CN201310539874.XA CN103596035B (en) | 2013-11-04 | A kind of system and method utilizing top box of digital machine to record DVB code stream |
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| CN201310539874.XA CN103596035B (en) | 2013-11-04 | A kind of system and method utilizing top box of digital machine to record DVB code stream |
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| CN105812831A (en) * | 2014-12-31 | 2016-07-27 | 中兴通讯股份有限公司 | Network program recording method, device and system and recorded program playing method and device |
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| CN107295331A (en) * | 2016-06-20 | 2017-10-24 | 深圳前海茂佳软件科技有限公司 | DTV in-site modeling method of testing and system |
| CN107786888A (en) * | 2017-11-07 | 2018-03-09 | 四川九州电子科技股份有限公司 | The system and method for forwarding HDMI video signal is gathered using top box of digital machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105791951A (en) * | 2014-12-26 | 2016-07-20 | Tcl海外电子（惠州）有限公司 | Recording method and device for audio and video code stream |
| CN105812831A (en) * | 2014-12-31 | 2016-07-27 | 中兴通讯股份有限公司 | Network program recording method, device and system and recorded program playing method and device |
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| CN107295331A (en) * | 2016-06-20 | 2017-10-24 | 深圳前海茂佳软件科技有限公司 | DTV in-site modeling method of testing and system |
| CN107786888A (en) * | 2017-11-07 | 2018-03-09 | 四川九州电子科技股份有限公司 | The system and method for forwarding HDMI video signal is gathered using top box of digital machine |
| CN112423018A (en) * | 2020-10-27 | 2021-02-26 | 深圳Tcl新技术有限公司 | Media file coding transmission method, device, equipment and readable storage medium |
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