CN104284206B - Audio/video player system, video frequency transmitter and video play device - Google Patents
Audio/video player system, video frequency transmitter and video play device Download PDFInfo
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- CN104284206B CN104284206B CN201310294606.6A CN201310294606A CN104284206B CN 104284206 B CN104284206 B CN 104284206B CN 201310294606 A CN201310294606 A CN 201310294606A CN 104284206 B CN104284206 B CN 104284206B
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26258—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2385—Channel allocation; Bandwidth allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
- H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4383—Accessing a communication channel
Abstract
A kind of audio/video player system, video frequency transmitter and video play device.Audio/video player system includes server and at least one client terminal device.Server obtains transmission of video crossfire from signal source.Server and at least one client terminal device interconnecting line in LAN.Server obtains frequency point information from transmission of video crossfire, channel identification information and its modulation intelligence corresponding to each frequency point information, to produce the channel parameter list for possessing each channel data in transmission of video crossfire.When client terminal device sends channel data request to server, server transmits channel parameter list to client terminal device, so that client terminal device sends channel playing request to server according to channel parameter list, so as to select the specific channel in transmission of video crossfire and play.
Description
Technical field
Can directly it be obtained by signal source the invention relates to a kind of audio/video player system, and in particular to one kind
Obtain audio/video player system, video frequency transmitter and the video play device of channel parameter list.
Background technology
Satellite is to network technology (satellite-to-IP；SAT>IP, SAT-IP) can be by the program obtained from satellite
Appearance passes through SAT>IP standards and be converted to the package for meeting network convention, and can be allowed by LAN various mobile devices and
Digital household appliances (e.g., smart mobile phone, tablet personal computer and intelligent television) can all pass through its wired or wireless home network compartment system
To receive satellite programming.In other words, SAT is passed through>The conversion of IP standards, TV programme can more can be led to easily
The transmission and broadcasting crossed between network progress different platform and equipment.
SAT at present>The mode that the client terminal device of IP technologies obtains the rendition list can divide into two kinds.First way
For " searching for prefabricated frequency ", that is, client terminal device is according to its internal default each frequency (it is, prefabricated frequency)
To SAT>IP server requirements channel parameter data therein, server can just scan in received signal crossfire,
And return the parameter list of each channel corresponding to the frequency.It is right that client terminal device by this mode can obtain each channel institute
The supplemental characteristic answered, but when client terminal device aforesaid way to be utilized obtains the channel parameter on numerous frequencies, client
Just the data transfer once for the progress of each frequency is needed between end device and server, will be produced when frequency quantity is excessive
Give birth to multiple data transfer and expended for a long time and be short of efficiency.The second way is then that client passes through outer net remote server
Download the parameter list for each channel made in addition.But such a mode then needs to allow client terminal device right in addition
Outer net enters line access.When outer net can not link, client terminal device will be unable to obtain channel parameter list.In addition, when outer net is
The developer of other countries rather than during home server, channel parameter list will likely have the situation of inaccuracy.Therefore, how to make
Client can quickly and correctly obtain channel parameter list, it has also become the considerable subject under discussion in this area one.
The content of the invention
The present invention provides a kind of audio/video player system, video frequency transmitter and video play device, can by signal come
Source directly obtains clear and definite channel parameter list without by linking outer net or the prefabricated frequency of search, and then effectively lifting
Client terminal device obtains the speed and correctness of channel parameter list.
The present invention proposes a kind of audio/video player system, and its server obtains transmission of video crossfire and and client from signal source
End device interconnecting line in LAN.Server obtains frequency point information, each frequency point information pair from transmission of video crossfire
The channel identification information answered and its modulation intelligence, to produce the channel parameter for possessing each channel data in transmission of video crossfire
List.When client terminal device sends channel data request to server, server transmits channel parameter list to making client
End device, so that client terminal device can send channel playing request to server according to channel parameter list, so as to select to regard
Specific channel in frequency transmission stream simultaneously plays.
In one embodiment of this invention, the identification code of above-mentioned channel parameter list including signal source, frequency point information,
Channel identification information corresponding to each frequency point information, and the modulation intelligence in signal source.
In one embodiment of this invention, above-mentioned channel identification information includes program identification code (Packet
Identifier；PID), Program Association Table (Program Association Table；PAT), Program Map Table (Program
Map Table；) and the various parameters of video and audio stream data PMT.
In one embodiment of this invention, above-mentioned each frequency point information includes specific frequency and corresponding frequency range is believed
Breath.
In one embodiment of this invention, above-mentioned signal source is satellite television broadcasting (DVB-S) and second generation satellite
During one of television broadcasting (DVB-S2), wherein channel parameter list further includes preposition identifier (frontend
Identifier (polarisation) information, sampling rate (symbol rate) and forward error correction (Forward), are polarized
Error Correction, FEC) parameter.
In one embodiment of this invention, when above-mentioned signal source is second generation satellite television broadcasting, its mid band ginseng
Ordered series of numbers table, which further includes, rolls down (roll-off) information and pilot tone (pilot tone) parameter.
In one embodiment of this invention, above-mentioned signal source is ground TV broadcast (DVB-T) and second generation ground
During one of television broadcasting (DVB-T2), wherein channel parameter list further includes transmission mode (transmission mode)
Parameter, guard interval (guard interval) parameter and forward error correction parameter.
In one embodiment of this invention, when above-mentioned signal source is second generation ground TV broadcast, its mid band ginseng
Ordered series of numbers table further includes physical layer pipe (physical layer pipes；PIP) parameter, the identification of second generation terrestrial broadcast system
Code, single-input single-output (single-input single-output；SISO) with multiple input single output (multiple-input
single-output；MISO) handoff parameter.
In one embodiment of this invention, kind of the above-mentioned server according to client terminal device demand selection signal source
Class, or multi-signal source is integrated to obtain compound transmission of video crossfire.
In one embodiment of this invention, above-mentioned server is box on a digital television.
In one embodiment of this invention, above-mentioned client terminal device is that possess the mobile dress for linking LAN function
Put, one of box on computer installation and another digital television.
The present invention proposes a kind of video frequency transmitter, and it includes signal source receiving unit, network connection unit and number
According to processing unit.Signal source receiving unit receives transmission of video crossfire from signal source.Network connection unit passes through LAN
Network with least one client terminal device line.Data processing unit couples signal source receiving unit and network connection unit,
To parse transmission of video crossfire to obtain frequency point information, channel identification information corresponding to each frequency point information and its modulation believe
Breath, use and produce and store the video parameter list for possessing each channel data in transmission of video crossfire.When client terminal device to
When video frequency transmitter sends channel data request, data processing unit transmits channel parameter list to client terminal device, with
Client terminal device is set to send channel playing request to video frequency transmitter according to channel parameter list, so as to select the video to pass
Specific channel in defeated crossfire simultaneously plays.
The present invention provides a kind of video play device, and it includes client network connection unit and data resolution unit.Visitor
Family end network connection unit is by LAN and video frequency transmitter line, and video frequency transmitter is received from signal source and regarded
Frequency transmission stream.Data resolution unit couples client network connection unit, to send channel data to video frequency transmitter
Request, and the channel parameter list for possessing each channel data in the transmission of video crossfire, foundation are received from video frequency transmitter
Channel parameter list and channel playing request is sent to video frequency transmitter, so as to select the specific channel in transmission of video crossfire
And play, wherein channel parameter list is known including channel corresponding to the frequency point information in transmission of video crossfire, each frequency point information
Other information and its modulation intelligence.
Based on above-mentioned, the server (also referred to as, video frequency transmitter) of the embodiment of the present invention can be regarded from signal source
Frequency transmission stream, and the channel data of all frequencies is obtained from transmission of video crossfire, use and produce corresponding channel parameter
List.Thereby, when client terminal device (also referred to as, video play device) sends channel data request to server, client
Device can quickly and correctly obtain channel parameter list from server, and play the section to be watched according to channel parameter list
Mesh, without by linking outer net or the prefabricated frequency of search, so can effectively lift client terminal device and obtain channel ginseng
The speed and correctness of ordered series of numbers table.
For features described above of the invention and advantage can be become apparent, special embodiment below, and coordinate institute's accompanying drawings
It is described in detail below.
Brief description of the drawings
Fig. 1 is the block diagram of the audio/video player system according to the embodiment of this case one.
Fig. 2 is according to the video frequency transmitter and its operating process of video transmission method depicted in the embodiment of this case one
Figure.
Fig. 3 is according to the video play device and its operating process of video broadcasting method depicted in the embodiment of this case one
Figure.
Fig. 4 is the overall operation flow chart according to the audio/video player system depicted in the embodiment of this case one.
【Symbol description】
10：Audio/video player system
100：Signal source
110：Server/video frequency transmitter
112：Signal source receiving unit
114：Network connection unit
116：Data processing unit
118：Data storage element
120：Client terminal device/video play device
122：Client network connection unit
124：Data resolution unit
130：Second client terminal device/video play device
S210~S350：Step
Embodiment
The audio/video player system that the embodiment of the present invention is proposed directly can obtain clear and definite channel by signal source joins
Ordered series of numbers table, and accurately can efficiently realize and broadcast in the case that user is intended to play video using multiple playing devices
Put application or the related needs of video.The evidence present invention is used in the various citings set forth below for meeting spirit of the embodiment of the present invention,
But the citing of the present embodiment should not be limited solely by using the present embodiment person.
Fig. 1 is the block diagram of the audio/video player system 10 according to the embodiment of this case one.It refer to Fig. 1, audio/video player system
10 include video frequency transmitter 110 and at least one video play device, video play device 120 as illustrated in FIG. 1,
130.The video frequency transmitter 110 of the present embodiment can service one or more video play devices 120,130.That is,
Video frequency transmitter 110 can service multiple video play devices, and these video play devices can be simultaneously by meeting this hair
Video frequency transmitter 110 and corresponding step flow described in bright embodiment are played from received by signal source 100
TV programme.In the present embodiment, video frequency transmitter 110 by LAN be respectively connecting to video play device 120,
130.In embodiments of the present invention, video frequency transmitter 110 is referred to as server 110, video play device 120,130 in
It is referred to as being the client terminal device 130 of client terminal device 120 and second in the present embodiment, uses apparent this reality of explanation
Apply example.
Audio/video player system 10 for example can be digital television system or home entertainment system.Video frequency transmitter 110
Box (Set-top-box) or computer on digital television in this way.Video play device 120,130, which possesses, connects the LAN
Function, video play device 120,130 for example can be mobile device, box on computer installation or digital television.Video is broadcast
It can be respectively box on different types of digital television to put device 120,130.However, should can be according to it using the present embodiment person
Implementation and appropriateness adjust used application apparatus, be not any limitation as herein.
Video frequency transmitter 110 includes signal source receiving unit 112, network connection unit 114, data processing unit
116 and data storage element 118.Signal source receiving unit 112 to from signal source 100 receive transmission of video crossfire.
Due to the wide variety in signal source 100, therefore " transmission of video crossfire " herein can meet digital video broadcast standard
Various message and video streams, such as the satellite such as DVB-S/S2, DVB-T/T2, DVB-C, ISDB-T, terrestrial broadcasting and wired
Television network standard, but and be not merely limited to digital video broadcast standard exemplified as above, other related TVs can also be used to pass
Agreement is broadcast to realize.The signal source receiving unit 112 of the present embodiment can be the antenna of box on machine, cable or other correlation letters
Number access device.Network connection unit 114 by LAN with least one video play device line.The present embodiment
Network connection unit 114 can be wired network adapter, wireless network card or relevant device.For example, video play device 120 can lead to
Cross client network connection unit 122 and with the line of video frequency transmitter 110.Data processing unit 116 parses above-mentioned regard
Frequency transmission stream, use each channel data obtained in transmission of video crossfire and produce corresponding channel parameter list, more
Further, video frequency transmitter 110 can also include a data storage element 118, to store above-mentioned channel parameter list.
The data processing unit 116 of the present embodiment can be controller or processor, and data storage element 118 can be then hard disc or
Other have the memory device of store function.
On the other hand, video play device 120 includes client network connection unit 122 and data resolution unit 124.Visitor
Family end network connection unit 122 can be wired network adapter, wireless network card or relevant device, and to video frequency transmitter 110
Line.Data resolution unit 124 can be the controller or processor of client, and to parse from video frequency transmitter 110
The channel parameter list received.
In the present embodiment, video playback can be illustrated in more detail using Fig. 2 to Fig. 4 flow chart and schematic diagram
System 10 and its video transmission technologies realized.In detail, Fig. 2 is the transmission of video depicted according to the embodiment of this case one
The operational flowchart of device and its video transmission method, Fig. 3 be according to the video play device depicted in the embodiment of this case one and
The operational flowchart of its video broadcasting method, and Fig. 4 is the totality according to the audio/video player system depicted in the embodiment of this case one
Operational flowchart.Depicted video frequency transmitter 110 and the video play device 120 in Fig. 3 embodiment in Fig. 2 embodiments
The overall operation flow for the audio/video player system being applicable to depicted in Fig. 4 embodiments.Still further, Fig. 4 embodiments
Overall operation flow is applied to Fig. 1 audio/video player system 10, in other words, the operation of video frequency transmitter 110 in Fig. 2 embodiments
Flow and the operating process of video play device 120 in Fig. 3 embodiments are also applied to Fig. 1 audio/video player system 10.It is below
Arrange in pairs or groups audio/video player system 10, and the present invention the is illustrated by video frequency transmitter 110 therein and video play device 120
The Detailed operating procedures of the audio/video player system of one embodiment.
Referring to Fig. 1 and Fig. 4, and the video frequency transmitter 110 for the Fig. 2 that arranges in pairs or groups and Fig. 3 video play device 120
Operating process.First, in step S210, video frequency transmitter 110 is received by signal source receiving unit 112 and comes from signal
The transmission of video crossfire in source 100.As it was previously stated, this signal source 100 can be satellite television broadcasting (DVB-S), the second generation
The numerals such as satellite television broadcasting (DVB-S2), ground TV broadcast (DVB-T) or second generation ground TV broadcast (DVB-T2)
Visual radio standard, it may be such that signal source receiving unit 112 according to client (video play device) using the present embodiment person
Demand and select different types of signal source 100, or these a variety of signal sources 100 are subjected to integration and use acquisition
Compound transmission of video crossfire, and then allow different video play device (such as 120 and 130) that such as primary and secondary screen can be utilized
Curtain or other modes to watch the TV signal in unlike signal source 100 simultaneously, are not any limitation as herein.
In step S220, data processing unit 116 parses transmission of video crossfire to obtain frequency point information, each frequency letter
Channel identification information corresponding to breath and its modulation intelligence, to produce the frequency for possessing each channel data in the transmission of video crossfire
Road parameter list.Also, in step S230, the processed channel parameter list finished is stored in by data processing unit 116
Data storage element 118.The identification code, frequency point information, each frequency point information that this channel parameter list includes signal source are corresponding
Channel identification information and its modulation intelligence.It is listed below the detailed description of above-mentioned each channel parameter.
The identification code in signal source is identifying the signal source 100 of audio/video player system 10.Frequency point information includes specific
Frequency and corresponding bandwidth information.Furthermore the present embodiment can give corresponding numbering to each specific frequency, this numbering is just
It is frequency that can be described as.For example, when frequency using 200kHz is an interval and by frequency separation as 890MHz, 890.2MHz,
890.4MHz ... 915MHz, are thereby divided into 125 radio bands and these radio bands will be given 1,2,3 ...
125 numbering.The bandwidth information corresponding with frequency then to provide near the frequency can channel search number frequency model
Enclose.
Channel identification information corresponding to each frequency point information then may include program identification code (PID), Program Association Table
(PAT), the various parameters of Program Map Table (PMT) and video and audio stream data.Program identification code is identifying difference
The packet of type, such as in digital video broadcast system, program identification code is the numeral by 13 bits to indicate
State the type of packet.Program Map Table lists program all in transmission of video crossfire, and provides to represent each program
The program identification code of corresponding Program Map Table form.Program Map Table lists each basic crossfire that a program is included
Classification, program identification code and other identifications description son (descriptor, such as the knowledge of IP/MAC platforms of data broadcasting is described
Other code).It is then to represent to adjust used by including audio/video player system 10 as modulation intelligence corresponding to each frequency point information
System processed, or to modulation system used in the signal from signal source 100.For example, when signal source 100 is second
During for satellite television broadcasting, its modulating system parameter (Modulation system) may be set to wide with second generation satellite television
Relevant parameter is broadcast, is, for example, " dvbs2 ".In another example to the modulation system of second generation satellite television broadcasting signal, then can be used
Such as QPSK (quadrature phase shift keying；QPSK) technology or eight phase phase-shift keying (PSK) (eight
phase shift keying；8PSK) technology.
It is noted that when signal source difference, data processing unit 116 is after completing to parse transmission of video crossfire
Caused channel parameter list can more include other channel parameters.Such situation will have more detailed in embodiment afterwards
Explanation, refer to aftermentioned.
Video frequency transmitter 110 will be detected and ask (step with the presence or absence of the channel data from video play device 120
S240).Asked when video play device 120 transmits channel transmission to video frequency transmitter 110 (step S310), and transmission of video
Device 110 judges to have when receiving above-mentioned transmission of video request, then the data processing unit 116 in data transmission device 110 will
Channel parameter list can be packaged, and the channel parameter list after encapsulation is transmitted to (the step of video play device 120
S250).It is pre- by one section and if data transmission device 110 has no the channel data request received from video play device 120
If after the time (step S280), the step of video frequency transmitter 110 also can voluntarily repeat above-mentioned S210 to S230, use periodically
Renewal is stored in the channel parameter list in data storage element 118, as shown in Figure 2.
In addition, in other embodiments, if video frequency transmitter 110, which has no, receives the frequency from video play device 120
Track data is asked, and video frequency transmitter 110 can not also update the channel parameter list being stored in data storage element 118, should
It should can be chosen whether to update channel parameter list according to its demand with the present embodiment person, be not any limitation as herein.
Then, in step S320, video play device 120 judges whether to receive from video frequency transmitter 110
Channel parameter list.When video play device 120 judges to receive channel parameter list, then in step S330, video playback fills
Putting the data resolution unit 124 in 120 will parse and decapsulate received channel parameter list.
Afterwards, in step S340, video play device 120 will be according to channel parameter list and to video frequency transmitter
110 send channel playing request.When video frequency transmitter 110 judges whether to receive the video from video play device 120
Playing request (step S260), and determining after having been received by video playback request, video frequency transmitter 110 is by transmission of video
The program string of specific channel in crossfire is streamed to video play device 120 (step S270), and by video play device 120
(step S350) is played after receiving the program crossfire of the specific channel.In the present embodiment, if video frequency transmitter 110 simultaneously
Channel playing request is not received, then after one section of preset time (step S280), video frequency transmitter 110 will be weighed voluntarily
The step of multiple above-mentioned S210 to S230, use the channel parameter list for regularly updating and being stored in data storage element 118.Another
In one embodiment, when video frequency transmitter 110 does not receive video playback request, video frequency transmitter 110 also can not be more
The new channel parameter list being stored in data storage element 118, be able to should choose whether using the present embodiment person according to its demand
Channel parameter list is updated, is not any limitation as herein.
By way of above-mentioned video frequency transmitter directly obtains channel parameter list by signal source, of the invention regards
Frequency play system can be not required to using other mechanism (such as searching for prefabricated frequency) or externally connected network to obtain other system
The program list information performed, and client terminal device can be made rapidly to obtain accurate channel parameter list.
In addition, as it was previously stated, when the signal source difference of Video transmission system, channel parameter list will likely include it
His channel parameter.Below by the situation that signal source is satellite television broadcasting or second generation satellite television broadcasting, and signal
Source describes in detail respectively for the situation of ground TV broadcast or two generation ground TV broadcasts.
Table (1)
Upper table (1) is the channel parameter list according to one embodiment of the invention, and it lists each parameter name and its corresponding
Use range.Refer to table (1), the signal source of the present embodiment is satellite television broadcasting or second generation satellite television broadcasting, and
It is applicable to the overall operation flow of audio/video player system in Fig. 1 audio/video player system 10 and Fig. 4.The present embodiment and above-mentioned reality
It is similar to apply example, therefore same action mode repeats no more with explanation.Its difference is, when signal source is that satellite television is wide
Broadcast or during second generation satellite television broadcasting, the data processing unit 116 in video frequency transmitter 110 parses the signal source
Frequency point information in 100, and produce corresponding channel parameter list will further include preposition identifier, polarization information, sampling rate with
And forward error correction parameter.In the present embodiment, preposition identifier is represented with the numerical value between 1 to 65535.Polarization information is carrying
For the polarizations mode in signal source, it may include horizontal linear polarization, vertical linear polarization, left-hand circular polarization and dextrorotation entelechy
Change.And sampling rate determines the levels of precision of signal, and numerical value in units of kSymb/s represents.As for forward error correction parameter
It is then that the control errors for preventing error code and being added in original signal are digital, uses and realize automatic error-correcting and and then raising letter
Number transmission reliability.In the present embodiment, the pattern of forward error correction parameter can be 12,23,34,56,78,89,35,45 and
910。
It is noted that when signal source 100 is second generation satellite television broadcasting, in video frequency transmitter 110
Data processing unit 116 parses the frequency point information in the signal source 100, and produces corresponding channel parameter list and will more wrap
Include and roll down information and pilot tone parameter, wherein it is to be represented with numerical value and can be set to 0.35,0.25 or 0.20 to roll down information, and lead
To the specific frequency as benchmark when frequency sound parameter is then modulated signal, and can be divided into have pilot tone with without two kinds of moulds of pilot tone
Formula, as shown in table (1).
Table (2)
Upper table (2) is the channel parameter list according to another embodiment of the present invention, and it lists each parameter name and its correspondingly
Use range.Refer to table (2), the signal source of the present embodiment is ground TV broadcast or second generation ground TV broadcast,
And the overall operation flow of the audio/video player system 10 suitable for Fig. 1 and audio/video player system Fig. 4.The present embodiment with it is above-mentioned each
Embodiment is similar, therefore same action mode repeats no more with explanation.Its difference is, when signal source is terrestrial television
When broadcast or second generation ground TV broadcast, the data processing unit 116 in video frequency transmitter 110 parses the signal source
Frequency point information in 100, and produce corresponding channel parameter list will further include transmission mode parameter, guard spacing parameter, with
And forward error correction parameter.In the present embodiment, transmission mode parameter is to represent the carrier number in orthogonal frequency-division multiplex singal frame,
It can be 2k, 4k, 8k, 1k, 16k and 32k.Guard spacing parameter can be 14,18,116,132,1128,19128 and
19256.And forward error correction parameter uses realization certainly then to the control errors number for preventing error code and being added in original signal
Move error correction simultaneously and then improve the reliability of signal transmission.In the present embodiment, the pattern of forward error correction parameter can be 12,35,23,
34th, 45,56 and 78.
It is noted that when signal source 100 is second generation ground TV broadcast, in video frequency transmitter 110
Data processing unit 116 parses the frequency point information in the signal source 100, and produces corresponding channel parameter list and will more wrap
Include physical layer pipe parameter, second generation terrestrial broadcast system identification code, single-input single-output and multiple input single output handoff parameter.
Physical layer pipe parameter is identifying each physical layer pipe.Second generation terrestrial broadcast system identification code is to identification signal source
100 be the second generation terrestrial broadcast system for belonging to what type.And the handoff parameter of single-input single-output and multiple input single output is then
It is the pattern that input and output are represented by a numerical value, multiple input single output is expressed as when described numerical value is 1, and 0
It is expressed as single-input single-output.
According to described above, when the signal source difference of the Video transmission system in the present embodiment, equally can directly lead to
Signal source is crossed to obtain channel parameter list and effectively lift speed and correctness that client terminal device obtains channel parameter list,
Wherein described channel parameter list basis signal source difference and can possess different channel datas.
For another viewpoint, the present invention proposes a kind of video frequency transmitter, and it is applied to above-mentioned audio/video player system.Depending on
Frequency transmitting device includes signal source receiving unit, network connection unit and data processing unit.Signal source receiving unit
The antenna of box for example, on machine.Network connection unit is, for example, wired network adapter, wireless network card or relevant device.Data processing unit
Controller or processor for example, in server.By the start of each part of this video frequency transmitter, above-mentioned video can be completed
The operating process of server in play system.Because the present embodiment is similar to the various embodiments described above, thus same action mode with
Explanation repeats no more.
For another viewpoint, the present invention proposes a kind of video play device, and it is applied to above-mentioned audio/video player system.Depending on
Frequency playing device includes client network connection unit and data resolution unit.Client network connection unit is, for example, wired network
Card, wireless network card or relevant device.Data resolution unit is, for example, the controller or processor of client.Pass through this video playback
The start of each part of device, the operating process of client terminal device in above-mentioned audio/video player system can be completed.Due to the present embodiment with
The various embodiments described above are similar, therefore same action mode repeats no more with explanation.
In summary, audio/video player system of the invention, video frequency transmitter and video play device, it is passed by video
Defeated device obtains transmission of video crossfire from signal source, and the channel data of all frequencies is obtained from transmission of video crossfire,
To produce corresponding channel parameter list.Particularly, it is corresponding produced by video frequency transmitter when signal source is not unique
Channel parameter list will may include different channel datas.Thereby, when video play device sends frequency to video frequency transmitter
When track data is asked, video play device can quickly and correctly obtain channel parameter list, and foundation from video frequency transmitter
Channel parameter list and channel playing request is sent to video frequency transmitter, use the selection channel to be watched and broadcasting, and
It so can need not effectively lift video play device by linking outer net or the prefabricated frequency of search and obtain channel parameter row
The speed and correctness of table.In addition, the audio/video player system of the present invention, which is also applicable to video frequency transmitter, services multiple videos
The situation of playing device.
Although the present invention is disclosed above with embodiment, so it is not limited to the present invention, any art
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when a little change and retouching can be made, thus it is of the invention
Protection domain when being defined depending on appended claims institute defender.
Claims (18)
- A kind of 1. audio/video player system, it is characterised in that including：Server, transmission of video crossfire is obtained from signal source；AndAt least one client terminal device, the wherein server mutually interconnect with least one client terminal device in LAN Line,Wherein, the server obtains frequency point information, channel identification letter corresponding to each frequency point information from the transmission of video crossfire Breath and its modulation intelligence, to produce the channel parameter list for possessing each channel data in the transmission of video crossfire, as the visitor Family end device to the server send channel data request when, the server transmits the channel parameter list at least one to this Client terminal device, so that the client terminal device sends channel playing request according to the channel parameter list to the server, from And select the specific channel in the transmission of video crossfire and play.
- 2. audio/video player system as claimed in claim 1, it is characterised in that wherein the channel parameter list comes including the signal The identification code in source, the frequency point information, channel identification information, the modulation intelligence in the signal source corresponding to each frequency point information.
- 3. audio/video player system as claimed in claim 2, it is characterised in that wherein the channel identification information includes program identification The various parameters of code, Program Association Table, Program Map Table and video and audio stream data.
- 4. audio/video player system as claimed in claim 2, it is characterised in that wherein each frequency point information include specific frequency with And corresponding bandwidth information.
- 5. audio/video player system as claimed in claim 2, it is characterised in that when the signal source is satellite television broadcasting and the During one of two generations satellite television broadcasting, the wherein channel parameter list further includes preposition identifier, polarization information, sampling rate And forward error correction parameter.
- 6. audio/video player system as claimed in claim 5, it is characterised in that when the signal source is that second generation satellite television is wide Sowing time, wherein the channel parameter list, which further include, rolls down information and pilot tone parameter.
- 7. audio/video player system as claimed in claim 2, it is characterised in that when the signal source is ground TV broadcast and the During one of two generation ground TV broadcasts, wherein the channel parameter list further include transmission mode parameter, guard spacing parameter, And forward error correction parameter.
- 8. audio/video player system as claimed in claim 7, it is characterised in that when the signal source is that second generation terrestrial television is wide Sowing time, wherein the channel parameter list further include physical layer pipe parameter, second generation terrestrial broadcast system identification code, single input list Output and multiple input single output handoff parameter.
- 9. audio/video player system as claimed in claim 1, it is characterised in that the server is according to the selection of client terminal device demand The species in signal source, or multi-signal source is integrated to obtain compound transmission of video crossfire.
- 10. audio/video player system as claimed in claim 1, it is characterised in that the server is box on digital television.
- 11. audio/video player system as claimed in claim 1, it is characterised in that the client terminal device is that possess to link the local One of box on the mobile device of network function, computer installation and another digital television.
- A kind of 12. video frequency transmitter, it is characterised in that including：Signal source receiving unit, transmission of video crossfire is received from signal source；Network connection unit, by LAN with least one client terminal device line；AndData processing unit, the signal source receiving unit and the network connection unit are coupled, parse the transmission of video crossfire To obtain frequency point information, channel identification information and its modulation intelligence corresponding to each frequency point information, possess to produce and store The channel parameter list of each channel data in the transmission of video crossfire,Wherein, when at least one client terminal device sends channel data request to the video frequency transmitter, the data processing Unit transmits the channel parameter list at least one client terminal device, so that at least one client terminal device foundation should Channel parameter list and channel playing request is sent to the video frequency transmitter, it is specific in the transmission of video crossfire so as to select Channel simultaneously plays.
- 13. video frequency transmitter as claimed in claim 12, it is characterised in that wherein the channel parameter list includes the signal The identification code in source, the frequency point information, channel identification information, the modulation intelligence in the signal source corresponding to each frequency point information.
- 14. video frequency transmitter as claimed in claim 13, it is characterised in that wherein the channel identification information is known including program The various parameters of other code, Program Association Table, Program Map Table and video and audio stream data.
- 15. video frequency transmitter as claimed in claim 12, it is characterised in that further include：Data storage element, is coupled and the controlled data processing unit is to store the channel parameter list.
- 16. video frequency transmitter as claimed in claim 12, wherein the signal source receiving unit is according to the client terminal device The species in demand selection signal source, or multi-signal source is integrated to obtain compound transmission of video crossfire.
- A kind of 17. video play device, it is characterised in that including：Client network connection unit, by LAN with video frequency transmitter line, wherein the video frequency transmitter from Signal source receives transmission of video crossfire；AndData resolution unit, the client network connection unit is coupled, the data resolution unit is sent to the video frequency transmitter Channel data is asked, and the channel parameter for possessing each channel data in the transmission of video crossfire is received from the video frequency transmitter List, channel playing request is sent to the video frequency transmitter according to the channel parameter list, so as to select the transmission of video Specific channel in crossfire simultaneously plays,Wherein the channel parameter list is known including channel corresponding to the frequency point information in the transmission of video crossfire, each frequency point information Other information and its modulation intelligence.
- 18. video play device as claimed in claim 17, it is characterised in that wherein the channel identification information is known including program The various parameters of other code, Program Association Table, Program Map Table and video and audio stream data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294606.6A CN104284206B (en) | 2013-07-12 | 2013-07-12 | Audio/video player system, video frequency transmitter and video play device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310294606.6A CN104284206B (en) | 2013-07-12 | 2013-07-12 | Audio/video player system, video frequency transmitter and video play device |
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| CN104284206A CN104284206A (en) | 2015-01-14 |
| CN104284206B true CN104284206B (en) | 2018-03-23 |
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| CN201310294606.6A Active CN104284206B (en) | 2013-07-12 | 2013-07-12 | Audio/video player system, video frequency transmitter and video play device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105025352A (en) * | 2015-07-21 | 2015-11-04 | 深圳市茁壮网络股份有限公司 | Digital television channel data packaging method and rapid searching method |
| CN105635839B (en) * | 2015-12-28 | 2019-03-29 | 深圳Tcl数字技术有限公司 | Smart television method for switching network and device |
| CN108833906B (en) * | 2018-06-11 | 2020-07-10 | 深圳创维数字技术有限公司 | Transmission method, system, server and storage medium for cable television signal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103067746A (en) * | 2011-10-20 | 2013-04-24 | 安美世纪（北京）科技有限公司 | System and method for hotel video service |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020049980A1 (en) * | 2000-05-31 | 2002-04-25 | Hoang Khoi Nhu | Controlling data-on-demand client access |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103067746A (en) * | 2011-10-20 | 2013-04-24 | 安美世纪（北京）科技有限公司 | System and method for hotel video service |
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