CN105430489B - A kind of switching method of television channel, device and equipment - Google Patents
A kind of switching method of television channel, device and equipment Download PDFInfo
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- CN105430489B CN105430489B CN201410479928.2A CN201410479928A CN105430489B CN 105430489 B CN105430489 B CN 105430489B CN 201410479928 A CN201410479928 A CN 201410479928A CN 105430489 B CN105430489 B CN 105430489B
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Abstract
The invention discloses a kind of method, device and equipments of television channel switching.Its method includes: the data flow for demodulating and transmitting on the corresponding frequency point of candidate handover channel；The data flow of the candidate handover channel is descrambled from the data flow transmitted on the frequency point；When receive be switched to the candidate handover channel operational order after, the data flow of the candidate handover channel is decoded.Technical solution provided in an embodiment of the present invention the processing such as is demodulated to candidate handover channel, is descrambled, to recognize the data flow of candidate handover channel when playing the program of current channel；When receive be switched to the candidate handover channel operational order after, recognize the data flow of candidate handover channel due to having passed through pretreatment, the channel can be quickly switched into, the time needed for saving switching channels.
Description
Technical field
The present invention relates to digital TV technology more particularly to a kind of switching methods of television channel, device and equipment.
Background technique
Currently, the zapping speed of DTV STB or digital TV integrated machine is slower than simulated television zapping speed.
The reason is that DTV STB or digital TV integrated machine are based on single channel demodulation, single channel descrambling, the decoded scheme of single channel.
DTV STB or digital TV integrated machine can only after receiving the operational order of switching channels, then demodulated,
Descrambling, to recognize the need for the data flow for the channel being switched to；The data flow of the channel is decoded to play the program of the channel.
Summary of the invention
The object of the present invention is to provide a kind of switching method of television channel, device and equipment, (are switched with solving zapping
Channel) slow-footed problem.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of method of television channel switching, comprising:
When playing the program of current channel, the data flow transmitted on the corresponding frequency point of candidate handover channel is demodulated；
The data flow of the candidate handover channel is descrambled from the data flow transmitted on the frequency point；
After receiving the operational order for being switched to the candidate handover channel, to the data flow of the candidate handover channel
It is decoded, and updates candidate handover channel.
Preferably, receiving after descrambling the data flow of the candidate handover channel and being switched to the candidate handover channel
Operational order before, this method further include:
Determine the audio/video coding format of the data flow of the candidate handover channel；
The corresponding idle audio/video decoding resource of the audio/video coding format is selected, and initializes the idle audio-video
Decode resource.
Based on above-mentioned any means embodiment, preferably, the data transmitted on the corresponding frequency point of demodulation candidate handover channel
Before stream, this method further include:
According to the switching channels operational order received in the first predetermined amount of time, channelsurfing patterns are selected, described the
The quantity of the switching channels operational order received in one predetermined amount of time reaches the first predetermined quantity；Alternatively, according to most proximity
The switching channels operational order of the second predetermined quantity received selects channelsurfing patterns；
According to the channelsurfing patterns of selection, candidate handover channel is determined；
Determine the corresponding frequency point of the candidate handover channel.
Preferably, channelsurfing patterns are selected according to the switching channels operational order received in the first predetermined amount of time,
Include:
Compare in the first predetermined amount of time, the quantity of the corresponding switching channels operational order of each channelsurfing patterns, choosing
Select the most channelsurfing patterns of the quantity of switching channels operational order；Alternatively,
According to the switching channels operational order for the second predetermined quantity being most recently received, channelsurfing patterns are selected, comprising:
In the switching channels operational order for comparing the second predetermined quantity being most recently received, each channelsurfing patterns are corresponding
Switching channels operational order quantity, select the most channelsurfing patterns of quantity of switching channels operational order.
Preferably, determining candidate handover channel according to the channelsurfing patterns of selection, comprising:
If the corresponding channelsurfing patterns of non-sequential switching channels operational order are selected, according in the second predetermined amount of time
Channel data determines at least one candidate handover channel by the duration descending of output display；
If the corresponding channelsurfing patterns of selecting sequence switching channels operational order, according to channel number ascending order and/
Or descending, at least one candidate handover channel is determined based on current channel.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of device of television channel switching, packet
It includes:
Demodulation module when for playing the program of current channel, transmits on the corresponding frequency point of demodulation candidate handover channel
Data flow；
Descrambling module, for descrambling the data flow of the candidate handover channel from the data flow transmitted on the frequency point；
Show output module, for when receive be switched to the candidate handover channel operational order after, to the candidate
The data flow of switching channels is decoded；
Prediction module, for when receive be switched to the candidate handover channel operational order after, update candidate handover frequency
Road.
Preferably, further including decoding preparation module, it is used for:
After the data flow for obtaining the candidate handover channel, receives and be switched to the candidate handover channel operational order
Before, the audio/video coding format of the data flow of the candidate handover channel is determined；
The corresponding idle audio/video decoding resource of the audio/video coding format is selected, and initializes the idle audio-video
Decode resource.
Based on above-mentioned any device embodiment, preferably, prediction module is specifically used for:
According to the switching channels operational order for the predetermined quantity being most recently received, channelsurfing patterns are selected, described first
The quantity of the switching channels operational order received in predetermined amount of time reaches the first predetermined quantity；Alternatively, being received according to nearest
The switching channels operational order of the second predetermined quantity arrived selects channelsurfing patterns；
According to the channelsurfing patterns of selection, candidate handover channel is determined；
Determine the corresponding frequency point of the candidate handover channel.
Preferably, selecting channelsurfing patterns according to the switching channels operational order received in the first predetermined amount of time
When, the prediction module is used for:
Compare in the first predetermined amount of time, the quantity of the corresponding switching channels operational order of each channelsurfing patterns, choosing
Select the most channelsurfing patterns of the quantity of switching channels operational order；Alternatively,
According to the switching channels operational order for the second predetermined quantity being most recently received, when selecting channelsurfing patterns, institute
Prediction module is stated to be used for:
In the switching channels operational order for comparing the second predetermined quantity being most recently received, each channelsurfing patterns are corresponding
Switching channels operational order quantity, select the most channelsurfing patterns of quantity of switching channels operational order.
Preferably, when determining candidate handover channel, the prediction module is used for according to the channelsurfing patterns of selection:
If the corresponding channelsurfing patterns of non-sequential switching channels operational order are selected, according in the second predetermined amount of time
Channel data determines at least one candidate handover channel by the duration descending of output display；
If the corresponding channelsurfing patterns of selecting sequence switching channels operational order, according to channel number ascending order and/
Or descending, at least one candidate handover channel is determined based on current channel.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of equipment of television channel switching, packet
It includes:
Processor, N number of tuner, N number of demodulator, demultiplexer and descrambler, N are the integer not less than 2；
When playing the program of current channel, the idle tuner of the processor selection, and the tuner pair of triggering selection
The data flow transmitted on the corresponding frequency point of candidate handover channel is tuned；
The corresponding demodulator of tuner of the processor triggering selection demodulates the data flow after the tuning；
The processor selects the idle channel of the demultiplexer, triggers idle letter of the demultiplexer by selection
Road obtains the control word of the candidate handover channel from the data flow after demodulation；
The processor triggering descrambler descrambles the candidate handover according to the control word from the data flow after demodulation
The data flow of channel；
Processor receives be switched to the candidate handover channel operational order after, to the data of the candidate handover channel
Stream is decoded, and updates candidate handover channel.
Preferably, further including multi-channel decoder；
The processor determines the audio/video coding format of the data flow of the candidate handover channel；
The corresponding idle audio/video decoding resource of audio/video coding format described in the processor selection multi-channel decoder,
And initialize the idle audio/video decoding resource.
Preferably, processor is according to the switching channels operational order received in the first predetermined amount of time, or most proximity
The switching channels operational order of the second predetermined quantity received selects channelsurfing patterns；According to the channelsurfing patterns of selection,
Determine candidate handover channel；Determine the corresponding frequency point of candidate handover channel, the switching received in first predetermined amount of time
The quantity of channel operational order reaches the first predetermined quantity.
Technical solution provided in an embodiment of the present invention carries out candidate handover channel when playing the program of current channel
The processing such as demodulation, descrambling, to identify the data flow of candidate handover channel；Candidate handover channel behaviour is switched to when receiving
After instructing, the data flow of candidate handover channel is recognized due to having passed through pretreatment, can be quickly switched into the frequency
Road, time needed for saving switching channels.
Detailed description of the invention
Fig. 1 is method flow diagram provided in an embodiment of the present invention；
Fig. 2 is schematic device provided in an embodiment of the present invention；
Fig. 3 is equipment schematic diagram provided by one embodiment of the present invention；
Fig. 4 is the equipment schematic diagram that another embodiment of the present invention provides.
Specific embodiment
Below in conjunction with attached drawing, technical solution provided in an embodiment of the present invention is described in detail.
Television channel switching method provided in an embodiment of the present invention is as shown in Figure 1, specifically include following operation:
Step 100, when playing the program of current channel, the data transmitted on the corresponding frequency point of demodulation candidate handover channel
Stream.
In the embodiment of the present invention, the data flow transmitted on frequency point can with but be not limited only to be TS stream.
Step 110, the data flow that the candidate handover channel is descrambled from the data flow transmitted on the frequency point.
Step 120, when receive be switched to the candidate handover channel operational order after, to the candidate handover channel
Data flow is decoded, and updates candidate handover channel.
Technical solution provided in an embodiment of the present invention carries out candidate handover channel when playing the program of current channel
The processing such as demodulation, descrambling, to identify the data flow of candidate handover channel；Candidate handover channel behaviour is switched to when receiving
After instructing, the data flow of candidate handover channel is identified due to having passed through pretreatment, can be quickly switched into the frequency
Road, time needed for saving switching channels.
Preferably, receiving after the data flow of descrambling candidate handover channel and being switched to candidate handover channel operational order
Before, the audio/video coding format of the data flow of candidate handover channel is determined；Select the audio/video coding format corresponding free time
Audio/video decoding resource, and initialize the free time audio/video decoding resource.
In the embodiment of the present invention, audio/video decoding resource can with but be not limited only to include the resource of audio/video decoder and interior
Deposit resource.
By allocating audio/video decoding resource in advance, the speed of channel switching can be further improved.
In the embodiment of the present invention, if not allocating audio/video decoding resource in advance, in the decoding process of step 120,
Audio/video decoding resource is distributed first, then is decoded.
If there are two even more candidate handover channels, and have the demodulation descrambling resources of multichannel free time (optional
Further include audio/video decoding resource), then the implementation that can be described on multichannel idling-resource according to above-described embodiment is parallel
It is pre-processed.
Based on above-mentioned any means embodiment, preferably, the data transmitted on the corresponding frequency point of demodulation candidate handover channel
Before stream, according to the switching channels operational order received in the first predetermined amount of time, or second be most recently received is predetermined
The switching channels operational order of quantity selects channelsurfing patterns；According to the channelsurfing patterns of selection, candidate handover frequency is determined
Road；Determine the corresponding frequency point of candidate handover channel.Wherein, the switching channels operational order received in the first predetermined amount of time
Quantity reach the first predetermined quantity.
The implementation of channel switching provided in an embodiment of the present invention, before pre-processing, first predicting candidate switching channels.
Inventor has found in the implementation of the present invention, and user can zapping in several ways.For example, can be pressed by channel number
Key zapping, can be by program switching key zapping, can be by ascending order zapping key or descending zapping key zapping, can be by aobvious
Show the ascending order zapping icon or descending zapping icon zapping on menu, the channel number icon or section on display menu can be passed through
Mesh content icon etc. zapping.According to the different zapping habit of user, different channelsurfing patterns can be pre-configured with.This hair
In bright embodiment, two channelsurfing patterns can be divided, one is the corresponding channel switching of sequence switching channels operational order
Mode, one is the corresponding channelsurfing patterns of non-sequential switching channels operational order.
Wherein, sequence switching channels operational order can with but be not limited only to include that user is changed by ascending order zapping key, descending
The operation that platform key, the ascending order zapping icon on triggering display menu, the descending zapping icon on triggering display menu generate refers to
It enables.
Wherein, non-sequential switching channels operational order can with but be not limited only to include cutting by channel number key, by program
The operation that key, the channel number icon on triggering display menu, the programme content icon on triggering display menu generate is changed to refer to
It enables.
It should be pointed out that the mode for dividing channelsurfing patterns is not limited only to above-mentioned implementation.For example, it is also possible to draw
It is divided into: the corresponding channelsurfing patterns of operational order generated by channel number key, the operation generated by program switching key
Corresponding channelsurfing patterns, the channel number icon on triggering display menu are instructed, triggering shows the programme content on menu
The corresponding channelsurfing patterns of operational order that icon generates, the behaviour generated by ascending order zapping zapping key, descending zapping key
Make to instruct corresponding channelsurfing patterns, the descending on ascending order zapping icon, triggering display menu on triggering display menu changes
The corresponding channelsurfing patterns of operational order, etc. that platform icon generates.This is not limited by the present invention.
Preferably, the implementation of selection channelsurfing patterns may is that and compare in the first predetermined amount of time, each channel
The quantity of the corresponding switching channels operational order of switch mode, the channel switching for selecting the quantity of switching channels operational order most
Mode.It is also possible to: in the switching channels operational order for comparing the second predetermined quantity being most recently received, each channel switching mould
The quantity of the corresponding switching channels operational order of formula, the channelsurfing patterns for selecting the quantity of switching channels operational order most.
Wherein, the operational order that ascending order zapping key generates is pressed for user, the operation that zapping key generates in descending order refers to
It enables, the operational order that the ascending order zapping icon on triggering display menu generates, the descending zapping icon on triggering display menu is raw
At operational order, can cut the quantity maximum value of the operational order continuously received is corresponding with other channelsurfing patterns
The quantity for changing channel operational order compares.By taking the division mode of above-mentioned two channelsurfing patterns as an example, it is assumed that first is pre-
It fixes time in section, the maximum quantity for continuously receiving the operational order generated by ascending order zapping key is 3, is continuously received by drop
The maximum quantity for the operational order that sequence zapping key generates is 4, continuously receives the ascending order zapping icon on triggering display menu
The maximum quantity of the operational order of generation is 5, continuously receives the operation that the descending zapping icon on triggering display menu generates
The maximum quantity of instruction is 6.The operation that the descending zapping icon on the triggering display menu continuously received can be then generated
The maximum quantity 6 of instruction is compared with the total quantity of switching channels operational order non-sequential in the first predetermined amount of time；It can also
The total quantity of sequence switching channels operational orders all in the first predetermined amount of time and all non-sequential switching channels to be operated
The total quantity of instruction is compared；It can also will continuously receive the maximum quantity for the operational order that zapping key generates in descending order
The sum of maximum quantity of operational order 10 for being generated with the descending zapping icon on the triggering display menu that continuously receives and the
The total quantity of non-sequential switching channels operational order is compared in one predetermined amount of time；Etc., this is not limited by the present invention.
In actual application, each switching channels operational order can be recorded, and record connecing for operational order
Between time receiving.
The reception frequency of switching channels operational order can be monitored, if frequency be higher than certain threshold value, according to it is current when
The switching channels operational order selection candidate handover channel received in the first predetermined time before quarter.To guarantee that prediction is accurate
Property, first predetermined time is unsuitable too long, and the first predetermined quantity of switching channels operational order is unsuitable very few.First pre- timing
Between and the specific value of the first predetermined quantity, the present invention is not construed as limiting.For example, the first predetermined time was 1 minute, switching channels operation
First predetermined quantity of instruction is 20.So, if the switching channels operational order that is received in 1 minute before current time
Quantity is more than 20, then channel prediction is carried out according to the switching channels operational order received before current time, if currently
The lazy weight of the switching channels operational order received in 1 minute before moment 20, then can be without prediction.If frequency
Lower than certain threshold value, then not limiting time, refers to according to the operation of the switching channels for the second predetermined quantity (such as 5) being most recently received
It enables and carries out channel prediction.
Preferably, determining that the implementation of candidate handover channel may is that if non-sequential switching channels operation is selected to refer to
Corresponding channelsurfing patterns are enabled, according to channel data in the second predetermined amount of time by the duration descending of output display, are determined extremely
A few candidate handover channel；If the corresponding channelsurfing patterns of selecting sequence switching channels operational order, are compiled according to channel
Number ascending order and/or descending, at least one candidate handover channel is determined based on current channel.
In the embodiment of the present invention, the quantity of candidate handover channel depends on the multichannel process ability of hardware platform.
In the embodiment of the present invention, the first predetermined amount of time can be the same or different with the second predetermined amount of time, this hair
It is bright that this is not construed as limiting.
In above-mentioned steps 120, updating candidate handover channel can be by the way of above-mentioned any predicting candidate switching channels
It realizes.
In the embodiment of the present invention, at least one candidate handover channel is determined based on current channel, refers to determining current channel
At least one candidate handover channel before (descending of channel number) or later (ascending order of channel number).Wherein, currently
Channel refers to the channel of current display output.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of device of television channel switching, such as
Shown in Fig. 2, which includes:
Demodulation module 201 when for playing the program of current channel, transmits on the corresponding frequency point of demodulation candidate handover channel
Data flow；
Descrambling module 202, for descrambling the data of the candidate handover channel from the data flow transmitted on the frequency point
Stream；
Show output module 203, for when receive be switched to the candidate handover channel operational order after, to the time
It selects the data flow of switching channels to be decoded, and updates candidate handover channel.
Technical solution provided in an embodiment of the present invention carries out candidate handover channel when playing the program of current channel
The processing such as demodulation, descrambling, to identify the data flow of candidate handover channel；Candidate handover channel behaviour is switched to when receiving
After instructing, the data flow of candidate handover channel is identified due to having passed through pretreatment, can be quickly switched into the frequency
Road, time needed for saving switching channels.
Preferably, further including decoding preparation module, it is used for:
After the data flow for descrambling the candidate handover channel, receives and be switched to the candidate handover channel operational order
Before, the audio/video coding format of the data flow of the candidate handover channel is determined；
The corresponding idle audio/video decoding resource of the audio/video coding format is selected, and initializes the idle audio-video
Decode resource.
It is used for based on above-mentioned any device embodiment preferably, further including prediction module:
According to the switching channels operational order received in the first predetermined amount of time, channelsurfing patterns are selected, described the
The quantity of the switching channels operational order received in one predetermined amount of time reaches the first predetermined quantity；Alternatively, according to most proximity
The switching channels operational order of the second predetermined quantity received selects channelsurfing patterns；
According to the channelsurfing patterns of selection, candidate handover channel is determined；
Determine the corresponding frequency point of the candidate handover channel.
Preferably, selecting channelsurfing patterns according to the switching channels operational order received in the first predetermined amount of time
When, the prediction module is used for:
Compare in the first predetermined amount of time, the quantity of the corresponding switching channels operational order of each channelsurfing patterns, choosing
Select the most channelsurfing patterns of the quantity of switching channels operational order；Alternatively,
According to the switching channels operational order for the second predetermined quantity being most recently received, when selecting channelsurfing patterns, institute
Prediction module is stated to be used for:
In the switching channels operational order for comparing the second predetermined quantity being most recently received, each channelsurfing patterns are corresponding
Switching channels operational order quantity, select the most channelsurfing patterns of quantity of switching channels operational order.
Preferably, when determining candidate handover channel, the prediction module is used for according to the channelsurfing patterns of selection:
If the corresponding channelsurfing patterns of non-sequential switching channels operational order are selected, according in the second predetermined amount of time
Channel data determines at least one candidate handover channel by the duration descending of output display；
If the corresponding channelsurfing patterns of selecting sequence switching channels operational order, according to channel number ascending order and/
Or descending, at least one candidate handover channel is determined based on current channel.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of equipment of television channel switching, such as
Shown in Fig. 3, which is included at least: processor, N number of tuner (Tuner), N number of demodulator (Demod), demultiplexer
(Demux) and descrambler, N are the integer not less than 2.
Wherein, when playing the program of current channel, the idle tuner of processor selection, and the tuner pair of triggering selection
The data flow transmitted on the corresponding frequency point of candidate handover channel is tuned；The corresponding demodulator of the tuner of triggering selection is to upper
Data flow after stating tuning is demodulated；Select the idle channel of demultiplexer, the idle letter that triggering demultiplexer passes through selection
Road obtains the control word of candidate handover channel from the data flow after demodulation；Triggering descrambler is according to the control word after demodulation
The data flow of candidate handover channel is descrambled in data flow；It receives after being switched to candidate handover channel operational order, candidate is cut
The data flow for changing channel is decoded, and updates candidate handover channel.
Technical solution provided in an embodiment of the present invention carries out candidate handover channel when playing the program of current channel
The processing such as demodulation, descrambling, to identify the data flow of candidate handover channel；Candidate handover channel behaviour is switched to when receiving
After instructing, the data flow of candidate handover channel is identified due to having passed through pretreatment, can be quickly switched into the frequency
Road, time needed for saving switching channels.
Preferably, further including multi-channel decoder (Decoder)；Processor determines the sound view of the data flow of candidate handover channel
Frequency coded format；The corresponding idle audio/video decoding resource of the audio/video coding format in multi-channel decoder is selected, and is initialized
The free time audio/video decoding resource.
In the embodiment of the present invention, demultiplexer, descrambler and multi-channel decoder production are on the same chip.Optionally,
Tuner and/or demodulator also make on the chip.
Based on above-mentioned arbitrary equipment embodiment, preferably, processor is according to the switching received in the first predetermined amount of time
Channel operational order, or the switching channels operational order of the second predetermined quantity being most recently received, select channelsurfing patterns；
According to the channelsurfing patterns of selection, candidate handover channel is determined；Determine the corresponding frequency point of candidate handover channel, described first is pre-
The quantity of the switching channels operational order received in section of fixing time reaches the first predetermined quantity.
Equipment provided in an embodiment of the present invention can be set-top box, can be digital TV integrated machine, be also possible to be arranged
Equipment inside set-top box can also be the equipment being arranged in inside digital TV integrated machine.
Below based on equipment shown in Fig. 4, its working principle is described in detail:
Technical solution provided in an embodiment of the present invention can be divided into two big treatment processes.
One is the prediction process of candidate handover channel.
The switching channels operational order in the first predetermined amount of time is specifically collected, channelsurfing patterns is selected accordingly, adopts
Candidate handover channel is selected with the corresponding predicting strategy of the channelsurfing patterns of selection.
In the present embodiment, according to user's usage mode, channelsurfing patterns have following four:
Mode 1: inputting channel numbering.
Mode 2:[CH+] [CH-] key input mode.
Mode 3: showing under the channel list of menu, [on] [under] icon triggering mode.
Mode 4:[alternating] key mode.
Wherein, mode 1 and mode 4 are the corresponding channelsurfing patterns of non-sequential switching channels operational order, 2 He of mode
Mode 3 is the corresponding channelsurfing patterns of sequence switching channels operational order.
In the embodiment of the present invention, can the operations of periodical mobile phone switching channels cause instruction, then, the first predetermined time was
One period.
Assuming that the first predetermined amount of time when it is one minute a length of, in the first predetermined amount of time, receive 100 switchings frequency
Road operational order.Wherein, operational order 30 times generated by channel number key, the operational order 5 generated by [CH+] [CH-]
Secondary, generate operational order 15 times of triggering [on] [under] icon can determine that as mode 1.
According to (24 hours such as nearest) channel data in the second predetermined amount of time by the duration descending of output display, determine extremely
A few candidate handover channel.
If it is determined that channelsurfing patterns be mode 2 or mode 3, it is determined that the channel before or after current channel
As candidate handover channel.Specifically, selecting at least one after current channel if ascending order switching switches more than descending
Channel is as candidate handover channel, if descending switching switches more than ascending order, selects at least one frequency before current channel
Road is as candidate handover channel.
Secondly being preprocessing process.
Processor extracts corresponding frequency point parameters according to the channel number of candidate handover channel from program database,
It determines the corresponding frequency point of candidate handover channel, is pre-processed.Wherein, a frequency point can correspond to different channel, such as center
Platform 1-5 platform shares a frequency point.One frequency point can also only correspond to a channel.
Pretreatment is divided into preset adjustment, pre-demodulating, proposes table, pre- descrambling, code stream analysis, decoder 6 steps of preparation in advance.
Preset adjustment: processor select a current idle tuner, by its be tuned to the corresponding frequency point of predictive channel number,
Namely by the corresponding frequency point of candidate handover channel process corresponding with tuner.After the completion of the process, the tuner of selection coordinates
The stream compression, is specifically changed into fixed intermediate-frequency IF signal by the data flow transmitted on the corresponding frequency point of candidate handover channel.
Pre-demodulating: processor selects the demodulator being connected with the tuner, and the data flow exported to tuner is gone in triggering demodulation
It is demodulated.
Mention table in advance: the data channel of demodulator is associated with by processor with an idle channel of demux, and is set for demux
Data filtering condition is set, triggers demux by extracting CAT and pmt table from data flow with the associated channel of demodulator.Wherein one
The corresponding CAT of a frequency point, when the corresponding frequency point of candidate handover channel had been extracted CAT table, it may not be necessary to which repetition mentions
It takes.
In Program Map Table (PMT) including each program elementary stream information, that is, video information, audio-frequency information and with close
More CA ECM Entitlement Control Message.
Wherein, filter condition includes at least the PID and table id of CAT and PMT.
Pre- descrambling: CA (condition reception) description field in pmt table is issued CA kernel by processor, and CA kernel extracts
ECM and EMM data, smart card provide the Control Word (control word) that descrambling needs by ECM data and EMM data,
CW is arranged into descrambler again, is descrambled by descrambler according to data flow of the CW to candidate handover channel.
Code stream analysis: processor carries out format analysis to the packet header of the data flow of candidate handover channel, show that audio-video is compiled
Code format.
Decoder prepares: processor applies for idle audio/video decoder resource according to audio/video coding format, and initial
Change idle audio/video decoder resource.
Technical solution provided in an embodiment of the present invention is suitable for set-top box, is also applied for digital TV integrated machine.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (4)
1. a kind of method of television channel switching characterized by comprising
When playing the program of current channel, the data flow transmitted on the corresponding frequency point of candidate handover channel is demodulated；
The data flow of the candidate handover channel is descrambled from the data flow transmitted on the frequency point；
After receiving the operational order for being switched to the candidate handover channel, the data flow of the candidate handover channel is carried out
Decoding, and update candidate handover channel；
After the data flow for descrambling the candidate handover channel, receive be switched to the candidate handover channel operational order it
Before, this method further include:
Determine the audio/video coding format of the data flow of the candidate handover channel；
The corresponding idle audio/video decoding resource of the audio/video coding format is selected, and initializes the idle audio/video decoding
Resource；
Before the data flow transmitted on the corresponding frequency point of demodulation candidate handover channel, this method further include:
According to the switching channels operational order received in the first predetermined amount of time, channelsurfing patterns are selected, described first is pre-
The quantity of the switching channels operational order received in section of fixing time reaches the first predetermined quantity；Alternatively, according to being most recently received
The second predetermined quantity switching channels operational order, select channelsurfing patterns；
According to the channelsurfing patterns of selection, candidate handover channel is determined；
Determine the corresponding frequency point of the candidate handover channel；
Wherein, the channelsurfing patterns include: the corresponding channelsurfing patterns of sequence switching channels operational order and non-suitable
The corresponding channelsurfing patterns of sequence switching channels operational order.
2. the method according to claim 1, wherein determining candidate handover according to the channelsurfing patterns of selection
Channel, comprising:
If the corresponding channelsurfing patterns of non-sequential switching channels operational order are selected, according to channel in the second predetermined amount of time
Data determine at least one candidate handover channel by the duration descending of output display；
If the corresponding channelsurfing patterns of selecting sequence switching channels operational order, according to the ascending order and/or drop of channel number
Sequence determines at least one candidate handover channel based on current channel.
3. a kind of device of television channel switching characterized by comprising
Demodulation module when for playing the program of current channel, demodulates the data transmitted on the corresponding frequency point of candidate handover channel
Stream；
Descrambling module, for descrambling the data flow of the candidate handover channel from the data flow transmitted on the frequency point；
Show output module, for when receive be switched to the candidate handover channel operational order after, to the candidate handover
The data flow of channel is decoded；
Prediction module, for when receive be switched to the candidate handover channel operational order after, update candidate handover channel；
Preparation module is decoded, after the data flow for obtaining the candidate handover channel, receives and is switched to the candidate and cuts
It changes before channel operational order, determines the audio/video coding format of the data flow of the candidate handover channel；
The corresponding idle audio/video decoding resource of the audio/video coding format is selected, and initializes the idle audio/video decoding
Resource；
The prediction module is specifically used for:
According to the switching channels operational order received in the first predetermined amount of time, channelsurfing patterns are selected, described first is pre-
The quantity of the switching channels operational order received in section of fixing time reaches the first predetermined quantity；Alternatively, according to being most recently received
The second predetermined quantity switching channels operational order, select channelsurfing patterns；
According to the channelsurfing patterns of selection, candidate handover channel is determined；
Determine the corresponding frequency point of the candidate handover channel；
Wherein, the channelsurfing patterns include: the corresponding channelsurfing patterns of sequence switching channels operational order and non-suitable
The corresponding channelsurfing patterns of sequence switching channels operational order.
4. a kind of equipment of television channel switching characterized by comprising
Processor, N number of tuner, N number of demodulator, N number of decoder, demultiplexer and descrambler, N are the integer not less than 2；
When playing the program of current channel, the idle tuner of the processor selection, and the tuner of triggering selection is to candidate
The data flow transmitted on the corresponding frequency point of switching channels is tuned；
The corresponding demodulator of tuner of the processor triggering selection demodulates the data flow after the tuning；
The processor selects the idle channel of the demultiplexer, trigger the demultiplexer by the idle channel of selection from
The control word of the candidate handover channel is obtained in data flow after demodulation；
The processor triggering descrambler descrambles the candidate handover channel according to the control word from the data flow after demodulation
Data flow；
The processor determines the audio/video coding format of the data flow of the candidate handover channel；
The corresponding idle audio/video decoding resource of audio/video coding format described in the processor selection decoder, and initialize
The free time audio/video decoding resource；
Processor receives be switched to the candidate handover channel operational order after, the data of the candidate handover channel are flowed into
Row decoding, and update candidate handover channel；
Processor is according to the switching channels operational order received in the first predetermined amount of time, or second be most recently received is pre-
The switching channels operational order of fixed number amount selects channelsurfing patterns；According to the channelsurfing patterns of selection, candidate handover is determined
Channel；Determine the corresponding frequency point of the candidate handover channel, the switching channels operation received in first predetermined amount of time
The quantity of instruction reaches the first predetermined quantity；
The channelsurfing patterns include: the corresponding channelsurfing patterns of sequence switching channels operational order and non-sequential switching
The corresponding channelsurfing patterns of channel operational order.
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| CN105898552A (en) * | 2016-06-20 | 2016-08-24 | 深圳创维数字技术有限公司 | Method and device for playing video data |
| CN107645671A (en) * | 2016-07-22 | 2018-01-30 | 南京中兴新软件有限责任公司 | Program switching method and device |
| CN106341727A (en) * | 2016-10-08 | 2017-01-18 | 北京邦天信息技术有限公司 | Channel switching method and apparatus, and video terminal |
| CN107295392A (en) * | 2017-08-04 | 2017-10-24 | 青岛海信电器股份有限公司 | The processing method and processing device of HBBTV applications |
| CN108881989A (en) * | 2018-06-12 | 2018-11-23 | 深圳国微视安科技有限公司 | A kind of quick plug-flow control method of live streaming TS program and system |
| CN110166824B (en) * | 2019-06-24 | 2021-07-06 | 湖南国科微电子股份有限公司 | Live television channel switching method and system based on set top box |
| CN111050207A (en) * | 2019-12-05 | 2020-04-21 | 海信电子科技（深圳）有限公司 | Television channel switching method and television |
| CN113992969A (en) * | 2020-07-27 | 2022-01-28 | 青岛海信宽带多媒体技术有限公司 | Method, device and terminal for rapidly switching digital television channels |
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