CN103313125A - Transport stream-based duplex digital television signal seamless switching method and system - Google Patents
Transport stream-based duplex digital television signal seamless switching method and system Download PDFInfo
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Abstract
The invention provides a transport stream-based duplex digital television signal seamless switching method and a transport stream-based duplex digital television signal seamless switching system. The method comprises the following steps: acquiring two transport streams of data with the same encoding mode and the same program content; respectively dismounting the two transport streams of data into a plurality of TS (transport stream) packets which take the predetermined number of bytes as a unit, wherein each TS packet comprises at least one PES (packet elementary stream) packet; reading DTS (decoding time stamp) frame information in each PES packet according to a PID (packet identifier) value of the encoding end mark of the PES packet, and taking the DTS frame information as a relative reference time stamp for code stream switching; aligning the two transport streams of data by taking the time stamp as the reference and caching the two transport streams of data; and respectively capturing the TS packets in each transport stream of data and performing continuous counting wrong statistics, outputting one transport stream of data with fewer errors as a main path, and discarding or taking the other transport stream of data with the same time for standby application. The invention discloses a code stream switching technology based on a transport stream base layer; the seamless switching on the objective sense is realized; and the receiving time delay error caused by the difference of channels and modulation modes are effectively evaded.
Description
Technical field
The invention belongs to signal handoff technique field, relate to a kind of digital television signal changing method, particularly relate to a kind of two-way digital television signal seamless handover method and system based on transport stream.
Background technology
For simulated television, generally finish the switching of two paths of signals at field blanking interval, and for Digital Television, because signal fully digitalization, and image and sound have all passed through compressed encoding, and compression all need meet different standard codes, is difficult to realize that digital television signal is at the seamless switching of program layer.Simple understanding for seamless switching is exactly that the stream after the switching is not no matter on subjective sensation or on the objective data, all have the vestige of splicing, just as original video/audio being carried out complete cataloged procedure.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of two-way digital television signal seamless handover method and system based on transport stream, be used for solving the problem that prior art is difficult to the seamless switching of realization program layer digital TV signal.
Reach for achieving the above object other relevant purposes, the invention provides a kind of two-way digital television signal seamless handover method and system based on transport stream.
A kind of two-way digital television signal seamless handover method based on transport stream, described two-way digital television signal seamless handover method based on transport stream comprises:
Obtain the two-way transmit flow data of same-code mode and same program content, be called first via transmit flow data and the second road transmit flow data;
The two-way transmit flow data is disassembled into respectively a plurality of TS bags take the byte of preset number as the unit, and each TS comprises that at least one PES wraps;
The pid value that the coding side that wraps according to PES indicates reads the DTS frame information in each PES bag, and with the relative reference time tag of described DTS frame information as the code stream switching;
Buffer memory after described first via transmit flow data and the second road transmit flow data alignd take time tag as benchmark;
The TS that grasps respectively in the transmit flow data of every road wraps the statistics of carrying out the continuous counter mistake, and the road transmit flow data that mistake is less is exported as main road, and the transmit flow data of another road same time is then given up or be for subsequent use.
Preferably, the number of byte is 188 in the described unit.
Preferably, the process of described continuous counter mistake is: the TS bag that utilizes the accumulative total algorithm to grasp in the transmit flow data of every road carries out continuous counter Wrong Shipment calculation.
Preferably, the two-way transmit flow data of described same-code mode and same program content is the two paths of signals that comes from different channels, has different delay, launches after different modulating.
Preferably, road signal in the described two paths of signals is satellite-signal, and another road signal is ground signal.
Preferably, the coding side of described PES bag comprises the program clock reference parameter PCR that rebuilds for the decoding end system clock, is used for Decoding Time Stamp DTS that when the regulation decoding end decode to the data flow of carrying the predefine label, is used for the regulation decoding end and when will carries the Presentation Time Stamp PTS that the data flow of predefine label shows.
The specific implementation process of preferably, described first via transmit flow data and the second road transmit flow data being alignd take time tag as benchmark comprises: utilize maximal phase like matching process described first via transmit flow data and the second road transmit flow data to be carried out DTS frame information coupling.
Preferably, described detailed process of carrying out DTS frame information coupling comprises:
Judge whether each road signal locks in the described two paths of signals; If locked, then this road signal is carried out the TS demultiplexing; Whether otherwise rejudging this road signal locks;
Signal behind the TS demultiplexing is carried out basic frame-grab, judge whether to have caught basic frame; If then carry out the frame coupling; Otherwise, recapture basis frame;
Judge whether to have caught the frame coupling; If then judge whether losing lock of space signal; Otherwise, re-start the frame coupling;
If space signal is losing lock not, then judge whether losing lock of primary signal, if then switch, otherwise rejudge whether losing lock of space signal;
If space signal is losing lock, then judge the road signal losing lock whether in the described two paths of signals, if then relock this road signal, then lock if not another road signal in the described two paths of signals.
A kind of two-way digital television signal seamless switch-over system based on transport stream, described system comprises: the first antenna, the second antenna, the first demodulation module, the second demodulation module, the first decoder module, the second decoder module, memory module, the wrong statistical module of continuous counter, the code stream selection module, the code stream output module; Described the first antenna reception first via bit stream data; Identical and the programme content of the coded system of described the second antenna reception and described first via transmit flow data is identical the second road bit stream data also; Described the first demodulation module links to each other with described the first antenna, and described first via bit stream data is demodulated to TS stream; Described the second demodulation module links to each other with described the second antenna, and described the second road bit stream data is demodulated to the 2nd TS stream; Described the first decoder module links to each other with described the first demodulation module, resolves described TS stream, finds out the basic frame of TS stream; Described the second decoder module links to each other with described the second demodulation module, resolves described the 2nd TS stream, finds out the basic frame of the 2nd TS stream; Described memory module links to each other respectively with the second decoder module with described the first decoder module, and described TS stream and the 2nd TS are flowed take basic frame as benchmark buffer memory after the alignment; The wrong statistical module of described continuous counter links to each other with described memory module, and the stream of the TS behind the rear buffer memory that aligns and the 2nd TS stream are carried out the wrong statistics of continuous counter; Described code stream selection module links to each other with the wrong statistical module of described continuous counter, and the road TS stream that mistake is less is as the main road code stream, and the TS of another road same time stream is then given up or is for subsequent use; Described code stream output module links to each other with described code stream selection module, exports described main road code stream.
Preferably, described the first decoder module comprises: a TS seals the dress unit, a DTS frame acquiring unit; A described TS seals the dress unit and links to each other with described the first demodulation module, and a plurality of TS that a described TS stream is disassembled into take the byte of preset number as the unit wrap; Each TS comprises at least one PES bag; A described DTS frame acquiring unit is sealed the dress unit with a described TS and is linked to each other, and the pid value that the coding side that wraps according to PES indicates reads the DTS frame information in each PES bag, and with the relative reference time tag of described DTS frame information as the code stream switching.
Preferably, described the second decoder module comprises: the 2nd TS seals the dress unit, the 2nd DTS frame acquiring unit; Described the 2nd TS seals the dress unit and links to each other with described the second demodulation module, and a plurality of TS that described the 2nd TS stream is disassembled into take the byte of preset number as the unit wrap; Each TS comprises at least one PES bag; Described the 2nd DTS frame acquiring unit is sealed the dress unit with described the 2nd TS and is linked to each other, and the pid value that the coding side that wraps according to PES indicates reads the DTS frame information in each PES bag, and with the relative reference time tag of described DTS frame information as the code stream switching.
As mentioned above, two-way digital television signal seamless handover method and system based on transport stream of the present invention have following beneficial effect:
Two-way digital television signal seamless handover method based on transport stream of the present invention is a kind of code stream handoff technique based on the basic layer of transport stream, can accomplish the seamless switching on the objective sense, effectively evade the receive time delay error that channel and modulation system difference are brought, can be applied to the several scenes such as front end emission machine room Hot Spare, space diversity reception switching, the wireless integration of three networks.
Description of drawings
Fig. 1 is the schematic flow sheet of the two-way digital television signal seamless handover method based on transport stream of the present invention.
Fig. 2 is the schematic flow sheet of the DTS of carrying out frame information coupling of the present invention.
Fig. 3 is the structural representation of the two-way digital television signal seamless switch-over system based on transport stream of the present invention.
Fig. 4 is that the embodiment of the invention two described losing lock situations according to satellite-signal or ground signal realize the fast schematic flow sheet of switching.
Label declaration
110 first antennas
120 second antennas
130 first demodulation modules
140 second demodulation modules
150 first decoder modules
151 the one TS seal the dress unit
152 the one DTS frame acquiring units
160 second decoder modules
161 the 2nd TS seal the dress unit
162 the 2nd DTS frame acquiring units
170 memory modules
The wrong statistical module of 180 continuous counters
190 code stream selection modules
200 code stream output modules
Embodiment
Below by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification.The present invention can also be implemented or be used by other different embodiment, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications or change under the spirit of the present invention not deviating from.
See also accompanying drawing.Need to prove, the diagram that provides in the present embodiment only illustrates basic conception of the present invention in a schematic way, satisfy only show in graphic with the present invention in relevant assembly but not component count, shape and size drafting when implementing according to reality, kenel, quantity and the ratio of each assembly can be a kind of random change during its actual enforcement, and its assembly layout kenel also may be more complicated.
The present invention is described in detail below in conjunction with embodiment and accompanying drawing.
Embodiment one
The present embodiment provides a kind of two-way digital television signal seamless handover method based on transport stream, and as shown in Figure 1, described two-way digital television signal seamless handover method based on transport stream comprises:
Obtain the two-way transmit flow data of same-code mode and same program content, be called first via transmit flow data and the second road transmit flow data.Further, the two-way transmit flow data of described same-code mode and same program content is the two paths of signals that comes from different channels, has different delay, launches after different modulating; Be that first via transmit flow data is the two paths of signals that coded system is identical and programme content is identical that comes from different channels, has different delay, launches after different modulating with the second road transmit flow data.Further, road signal in the described two paths of signals can be satellite-signal, and another road signal can be ground signal.
Two-way transmit flow data (be equivalent to TS stream) is disassembled into respectively a plurality of TS bags take the byte of preset number as the unit, and each TS comprises that at least one PES wraps; Wherein, the number of byte is 188 in the described unit, and a series of TS bags consist of TS stream.The TS bag is closed by one or more PES packages and forms, and the PES bag is a Packet Elementary Stream, is not basic frame.Particularly, the coding side of described PES bag comprises the program clock reference parameter PCR that rebuilds for the decoding end system clock, is used for the Decoding Time Stamp DTS when the regulation decoding end decode to the data flow of carrying the predefine label and is used for the regulation decoding end when to carry the Presentation Time Stamp PTS that the data flow of predefine label shows.In the time of decoding, demodulation multiplexer can become the TS Traffic Decomposition one by one PES bag, and then bale breaker can split into the PES bag ES stream of Audio and Video, and the ES stream (elementary stream, Basic Flow) of final video and audio frequency can be decoded by input decoder.The decoding of TS stream was divided into for two steps: the first step, from PID(packet identifier, Packet Identifier) is in 0 the TS bag, parses PAT(program association table, Program Association Table), then find the PID of each program source in the pat table, general this type of program source all is comprised of several ES streams, and is described in the pmt table, then the PID by program source, just can be at PMT(program mapping table, the program table of comparisons) retrieve the PID of each ES stream in the table.Second step, decoder are distinguished the bag on the TS stream (being the TS bag), and are decoded by different ES stream according to the PID of the stream of the ES in the pmt table.So TS stream namely when program multiplexing, has added PMT through program multiplexing and multiplexing two-layer the finishing of transmission, when transmission is multiplexing, has added PAT.
The pid value that the coding side that wraps according to PES indicates reads the DTS(decoding time stamp in each PES bag, separates the intersymbol mark) frame information, and with the relative reference time tag of described DTS frame information as the code stream switching.
Buffer memory after described first via transmit flow data and the second road transmit flow data alignd take time tag as benchmark is namely set up and is processed buffering area.The specific implementation process of further, described first via transmit flow data and the second road transmit flow data being alignd take time tag as benchmark comprises: utilize maximal phase like matching process described first via transmit flow data and the second road transmit flow data to be carried out DTS frame information coupling.
Particularly, described detailed process of carrying out DTS frame (Decoding Time Stamp, and PTS is packetized in the frame head the inside of PES bag together, do not include basic frame, just the concept of position information) information matches comprises as shown in Figure 2:
Judge whether each road signal locks in the described two paths of signals; If locked, then this road signal is carried out the TS demultiplexing; Whether otherwise rejudging this road signal locks;
Signal behind the TS demultiplexing is carried out basic frame-grab, judge whether to have caught basic frame; If then carry out the frame coupling; Otherwise, recapture basis frame;
Judge whether to have caught the frame coupling; If then judge whether losing lock of space signal; Otherwise, re-start the frame coupling;
If space signal is losing lock not, then judge whether losing lock of primary signal, if then switch, otherwise rejudge whether losing lock of space signal;
If space signal is losing lock, then judge the road signal losing lock whether in the described two paths of signals, if then relock this road signal, then lock if not another road signal in the described two paths of signals.
The TS that grasps respectively in the transmit flow data of every road wraps the statistics of carrying out the continuous counter mistake, and the road transmit flow data that mistake is less is exported as main road, and the transmit flow data of another road same time is then given up or be for subsequent use; This step is by the more hundreds of frame data of batch, select the wrong less frame of continuous counter as switching foundation, continuous change along with received signal quality, and finish not timing, quick, seamless mutual handoff technique, make the subjective view reception effect that finally presents can not with the naked eye identify handoff procedure.The key of whole handoff procedure is the selection to the sync mark of two-way transmit flow data, the accurate control of time reference, and the formulation of switchover policy.
The road signal (or transmitting data stream) of perhaps selecting relatively early to arrive receiver is as main road output broadcast, and another road signal (or transmitting data stream) is then as standby road.
Further, the process of described continuous counter mistake is: the TS bag that utilizes the accumulative total algorithm to grasp in the transmit flow data of every road carries out continuous counter Wrong Shipment calculation.
The present embodiment also provides a kind of two-way digital television signal seamless switch-over system based on transport stream, this switched system can be realized changing method of the present invention, but the implement device of changing method of the present invention includes but not limited to the described switched system of the present embodiment.As shown in Figure 3, described switched system comprises: the first antenna 110, the second antenna 120, the first demodulation modules 130, the second demodulation modules 140, the first decoder module 150, the second decoder module 160, memory module 170, the wrong statistical module 180 of continuous counter, code stream selection module 190, code stream output module 200.
Described the first antenna 110 receives first via bit stream data.
Described the second antenna 120 receives also identical the second road bit stream data of the identical and programme content of coded system with described first via transmit flow data; Described first via bit stream data and the second road bit stream data are the two paths of signals that comes from different channels, has different delay, launches after different modulating.
Described the first demodulation module 130 links to each other with described the first antenna 110, and described first via bit stream data is demodulated to TS stream;
Described the second demodulation module 140 links to each other with described the second antenna 120, and described the second road bit stream data is demodulated to the 2nd TS stream;
Described the first decoder module 150 links to each other with described the first demodulation module 130, resolves described TS stream, finds out the basic frame of TS stream; Further, described the first decoder module 150 comprises: a TS seals dress unit 151, the one DTS frame acquiring units 152; A described TS seals dress unit 151 and links to each other with described the first demodulation module 130, and a plurality of TS that a described TS stream is disassembled into take the byte of preset number as the unit wrap; Wherein, the number of byte is 188 in the described unit; Each TS comprises at least one PES bag; A described DTS frame acquiring unit 152 is sealed dress unit 151 with a described TS and is linked to each other, and the pid value that the coding side that wraps according to PES indicates reads the DTS frame information in each PES bag, and with the relative reference time tag of described DTS frame information as the code stream switching.
Described the second decoder module 160 links to each other with described the second demodulation module 140, resolves described the 2nd TS stream, finds out the basic frame of the 2nd TS stream; Further, described the second decoder module 160 comprises: the 2nd TS seals dress unit 161, the two DTS frame acquiring units 162; Described the 2nd TS seals dress unit 161 and links to each other with described the second demodulation module 140, and a plurality of TS that described the 2nd TS stream is disassembled into take the byte of preset number as the unit wrap; Wherein, the number of byte is 188 in the described unit; Each TS comprises at least one PES bag; Described the 2nd DTS frame acquiring unit 162 is sealed dress unit 161 with described the 2nd TS and is linked to each other, and the pid value that the coding side that wraps according to PES indicates reads the DTS frame information in each PES bag, and with the relative reference time tag of described DTS frame information as the code stream switching.
Described memory module 170 links to each other respectively with the second decoder module 160 with described the first decoder module 150, and described TS stream and the 2nd TS are flowed take basic frame as benchmark buffer memory after the alignment;
The wrong statistical module 180 of described continuous counter links to each other with described memory module 170, and the stream of the TS behind the rear buffer memory that aligns and the 2nd TS stream are carried out the wrong statistics of continuous counter;
Described code stream selection module 190 links to each other with the wrong statistical module 180 of described continuous counter, and the road TS stream that mistake is less is as the main road code stream, and the TS of another road same time stream is then given up or is for subsequent use;
Described code stream output module 200 links to each other with described code stream selection module 190, exports described main road code stream.
The present invention uses corresponding demodulation module, realize respectively the successful demodulation of two-way code stream, obtain two-way transport stream (TS) data of same-code mode and same program content, TS is through program multiplexing and multiplexing two-layer the finishing of transmission, for the efficient that guarantees to switch, arbitrary road code stream is not decoded, only each road code stream is disassembled into a plurality of TS bags take 188 bytes as the unit, each TS bag is comprised of one or more PES bags, the pid value that the coding side that wraps according to PES indicates, read the relative reference time tag that the DTS frame information in each PES bag switches as code stream, set up the data flow cache space of certain capacity, with the two-way code stream align take time tag as benchmark after input-buffer, carry out simultaneously the statistics of continuous counter mistake with hundreds of TS bags of accumulative total algorithm crawl, the road code stream that mistake is less is exported as main road, and the code stream of another road same time is then as for subsequent use or give up.The two-way signal bit stream has just been realized synchronously and output switching at the basic layer of transport stream like this, has realized seamless switching truly.
Embodiment two
The present embodiment switches to example with satellite-signal and ground signal the two-way digital television signal seamless handover method based on transport stream of the present invention is described in detail.Because the ground information source is the result to remodulates behind the satellite-signal demodulation demultiplexing, thereby have the above time delay of 1s, and test difference is unfixing.And satellite-signal is to send into receiving system by special satellite mobile receiver aerial, and receiving system Satellite demodulation module is demodulated to TS stream with the satellite RF signal, sends into buffer memory, considers the fluctuation of time delay, and buffer area is arranged on more than the 10s as far as possible.Utilize decoding chip according to the information of resolving corresponding TS stream, find out basic frame after, the bag of the TS after the basic frame behind the demultiplexing and this basis frame is sent into the SDRAM(buffer memory).In like manner, ground signal is also sent the basic frame of ground signal into SDRAM through after the same operation.Because basic frame all can add three and be used for synchronous parameter at the coding side of self, be respectively PCR, DTS and PTS, wherein PCR is program clock reference, and the system clock that is used for decoding end is rebuild; DTS is Decoding Time Stamp, is used for the regulation decoding end and when the data flow of carrying this label is decoded; PTS is Presentation Time Stamp, and the data flow that when will carry this label for the regulation decoding end shows; Although three labels are time mark, have certain precision and efficiency variance, the present invention uses is that the DTS of full accuracy and peak efficiency is as the alignment benchmark.Because identical basic frame satellite-signal always arrives first receiver than ground signal, therefore can in ground signal, search the basic frame of satellite-signal, finish frame coupling and synchronous.It is pointed out that owing to may have error code in the terrestrial channel, thus the frame matching ratio to the time can use maximal phase like matching process.Finishing synchronous TS stream can realize switching fast according to the losing lock situation of satellite-signal or ground signal, and concrete switching flow is referring to Fig. 4.
Two-way digital television signal seamless handover method based on transport stream of the present invention is a kind of code stream handoff technique based on the basic layer of transport stream, can accomplish the seamless switching on the objective sense, effectively evade the receive time delay error that channel and modulation system difference are brought, can be applied to the several scenes such as front end emission machine room Hot Spare, space diversity reception switching, the wireless integration of three networks.
In sum, the present invention has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not is used for restriction the present invention.Any person skilled in the art scholar all can be under spirit of the present invention and category, and above-described embodiment is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of finishing under disclosed spirit and the technological thought, must be contained by claim of the present invention.
Claims (11)
1. the two-way digital television signal seamless handover method based on transport stream is characterized in that, described two-way digital television signal seamless handover method based on transport stream comprises:
Obtain the two-way transmit flow data of same-code mode and same program content, be called first via transmit flow data and the second road transmit flow data;
The two-way transmit flow data is disassembled into respectively a plurality of TS bags take the byte of preset number as the unit, and each TS comprises that at least one PES wraps;
The pid value that the coding side that wraps according to PES indicates reads the DTS frame information in each PES bag, and with the relative reference time tag of described DTS frame information as the code stream switching;
Buffer memory after described first via transmit flow data and the second road transmit flow data alignd take time tag as benchmark;
The TS that grasps respectively in the transmit flow data of every road wraps the statistics of carrying out the continuous counter mistake, and the road transmit flow data that mistake is less is exported as main road, and the transmit flow data of another road same time is then given up or be for subsequent use.
2. the two-way digital television signal seamless handover method based on transport stream according to claim 1, it is characterized in that: the number of byte is 188 in the described unit.
3. the two-way digital television signal seamless handover method based on transport stream according to claim 1 is characterized in that, the process of described continuous counter mistake is: the TS bag that utilizes the accumulative total algorithm to grasp in the transmit flow data of every road carries out continuous counter Wrong Shipment calculation.
4. the two-way digital television signal seamless handover method based on transport stream according to claim 1, it is characterized in that: the two-way transmit flow data of described same-code mode and same program content is the two paths of signals that comes from different channels, has different delay, launches after different modulating.
5. the two-way digital television signal seamless handover method based on transport stream according to claim 4, it is characterized in that: road signal in the described two paths of signals is satellite-signal, another road signal is ground signal.
6. the two-way digital television signal seamless handover method based on transport stream according to claim 1 is characterized in that: when the coding side of described PES bag, be used for Decoding Time Stamp DTS that when the regulation decoding end decode to the data flow of carrying the predefine label, be used for the regulation decoding end will carry the Presentation Time Stamp PTS that the data flow of predefine label shows if comprising the program clock reference parameter PCR that rebuilds for the decoding end system clock.
7. the two-way digital television signal seamless handover method based on transport stream according to claim 4, it is characterized in that, the specific implementation process that described first via transmit flow data and the second road transmit flow data are alignd take time tag as benchmark comprises: utilize maximal phase like matching process described first via transmit flow data and the second road transmit flow data to be carried out DTS frame information coupling.
8. the two-way digital television signal seamless handover method based on transport stream according to claim 7 is characterized in that, described detailed process of carrying out DTS frame information coupling comprises:
Judge whether each road signal locks in the described two paths of signals; If locked, then this road signal is carried out the TS demultiplexing; Whether otherwise rejudging this road signal locks;
Signal behind the TS demultiplexing is carried out basic frame-grab, judge whether to have caught basic frame; If then carry out the frame coupling; Otherwise, recapture basis frame;
Judge whether to have caught the frame coupling; If then judge whether losing lock of space signal; Otherwise, re-start the frame coupling;
If space signal is losing lock not, then judge whether losing lock of primary signal, if then switch, otherwise rejudge whether losing lock of space signal;
If space signal is losing lock, then judge the road signal losing lock whether in the described two paths of signals, if then relock this road signal, then lock if not another road signal in the described two paths of signals.
9. two-way digital television signal seamless switch-over system based on transport stream is characterized in that:.
The first antenna receives first via bit stream data;
The second antenna receives also identical the second road bit stream data of the identical and programme content of coded system with described first via transmit flow data;
The first demodulation module links to each other with described the first antenna, and described first via bit stream data is demodulated to TS stream;
The second demodulation module links to each other with described the second antenna, and described the second road bit stream data is demodulated to the 2nd TS stream;
The first decoder module links to each other with described the first demodulation module, resolves described TS stream, finds out the basic frame of TS stream;
The second decoder module links to each other with described the second demodulation module, resolves described the 2nd TS stream, finds out the basic frame of the 2nd TS stream;
Memory module links to each other respectively with the second decoder module with described the first decoder module, and described TS stream and the 2nd TS are flowed take basic frame as benchmark buffer memory after the alignment;
The wrong statistical module of continuous counter links to each other with described memory module, and the stream of the TS behind the rear buffer memory that aligns and the 2nd TS stream are carried out the wrong statistics of continuous counter;
The code stream selection module links to each other with the wrong statistical module of described continuous counter, and the road TS stream that mistake is less is as the main road code stream, and the TS of another road same time stream is then given up or is for subsequent use;
The code stream output module links to each other with described code stream selection module, exports described main road code stream.
10. the two-way digital television signal seamless switch-over system based on transport stream according to claim 1 is characterized in that, described the first decoder module comprises:
The one TS seals the dress unit, links to each other with described the first demodulation module, and a described TS stream is disassembled into a plurality of TS bags take the byte of preset number as the unit; Each TS comprises at least one PES bag;
The one DTS frame acquiring unit is sealed the dress unit with a described TS and is linked to each other, and the pid value that the coding side that wraps according to PES indicates reads the DTS frame information in each PES bag, and with the relative reference time tag of described DTS frame information as the code stream switching.
11. the two-way digital television signal seamless switch-over system based on transport stream according to claim 1 is characterized in that, described the second decoder module comprises:
The 2nd TS seals the dress unit, links to each other with described the second demodulation module, and described the 2nd TS stream is disassembled into a plurality of TS bags take the byte of preset number as the unit; Each TS comprises at least one PES bag;
The 2nd DTS frame acquiring unit is sealed the dress unit with described the 2nd TS and is linked to each other, and the pid value that the coding side that wraps according to PES indicates reads the DTS frame information in each PES bag, and with the relative reference time tag of described DTS frame information as the code stream switching.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105323649A (en) * | 2014-07-18 | 2016-02-10 | 季春宏 | Wireless video transmission method and system of multi-route simultaneous transmission hot standby |
| CN106331840A (en) * | 2016-08-31 | 2017-01-11 | 青岛海信宽带多媒体技术有限公司 | Http live stream (HLS) protocol-based audio and video jump play method and apparatus |
| CN107343006A (en) * | 2017-07-13 | 2017-11-10 | 广州鼎飞航空科技有限公司 | A kind of method of transmitting video data and device |
| CN108462694A (en) * | 2018-02-02 | 2018-08-28 | 深圳广信网络传媒有限公司 | Dynamic media marker method, device, coding structure and system based on TS stream encapsulation |
| CN109218827A (en) * | 2017-07-03 | 2019-01-15 | 北京市博汇科技股份有限公司 | IP bitstreams switching method and apparatus |
| CN111163272A (en) * | 2019-12-18 | 2020-05-15 | 杭州当虹科技股份有限公司 | Seamless switching method for real-time stream |
| CN113950815A (en) * | 2019-06-13 | 2022-01-18 | 交互数字Ce专利控股公司 | Method and apparatus for switching from a first transport stream to a second transport stream of the same content |
| CN117156223A (en) * | 2023-10-31 | 2023-12-01 | 中央广播电视总台 | Real-time stream switching method, device, electronic equipment and storage medium |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105323649A (en) * | 2014-07-18 | 2016-02-10 | 季春宏 | Wireless video transmission method and system of multi-route simultaneous transmission hot standby |
| CN106331840A (en) * | 2016-08-31 | 2017-01-11 | 青岛海信宽带多媒体技术有限公司 | Http live stream (HLS) protocol-based audio and video jump play method and apparatus |
| CN106331840B (en) * | 2016-08-31 | 2019-05-21 | 青岛海信宽带多媒体技术有限公司 | A kind of redirect broadcasting method and device of the audio-video based on HLS protocol |
| CN109218827A (en) * | 2017-07-03 | 2019-01-15 | 北京市博汇科技股份有限公司 | IP bitstreams switching method and apparatus |
| CN107343006A (en) * | 2017-07-13 | 2017-11-10 | 广州鼎飞航空科技有限公司 | A kind of method of transmitting video data and device |
| CN108462694A (en) * | 2018-02-02 | 2018-08-28 | 深圳广信网络传媒有限公司 | Dynamic media marker method, device, coding structure and system based on TS stream encapsulation |
| CN113950815A (en) * | 2019-06-13 | 2022-01-18 | 交互数字Ce专利控股公司 | Method and apparatus for switching from a first transport stream to a second transport stream of the same content |
| CN111163272A (en) * | 2019-12-18 | 2020-05-15 | 杭州当虹科技股份有限公司 | Seamless switching method for real-time stream |
| CN117156223A (en) * | 2023-10-31 | 2023-12-01 | 中央广播电视总台 | Real-time stream switching method, device, electronic equipment and storage medium |
| CN117156223B (en) * | 2023-10-31 | 2024-03-15 | 中央广播电视总台 | Real-time stream switching method, device, electronic equipment and storage medium |
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