CN104320701A - Switching method and device for signal source - Google Patents
Switching method and device for signal source Download PDFInfo
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- CN104320701A CN104320701A CN201410435950.7A CN201410435950A CN104320701A CN 104320701 A CN104320701 A CN 104320701A CN 201410435950 A CN201410435950 A CN 201410435950A CN 104320701 A CN104320701 A CN 104320701A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 230000000007 visual effect Effects 0.000 abstract description 7
- 230000002452 interceptive effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
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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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44213—Monitoring of end-user related data
- H04N21/44222—Analytics of user selections, e.g. selection of programs or purchase activity
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
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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
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Databases & Information Systems (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Social Psychology (AREA)
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a switching method for a signal source. The switching method for the signal source comprises the following steps: when a detection instruction is detected, detecting whether a signal is input into each signal source channel of multimedia playing equipment or not; acquiring a video signal in a signal source channel into which the signal is input; encoding and caching the acquired video signal in an internal memory according to a preset caching rule; and when a signal source switching instruction is detected, reading out the corresponding video signal in the switched signal source channel from the internal memory, and displaying the video signal. The invention further discloses a switching device for the signal source. According to the switching method and device for the signal source disclosed by the invention, image information generated after switching can be displayed alternatively during switching of the signal source channels, so that visual stay during switching of the signal source channels is reduced greatly, and the visual effect of the multimedia playing equipment is enhanced.
Description
Technical field
The present invention relates to field of display devices, particularly relate to changing method and the device of signal source.
Background technology
Current television set, as parlor recreation terminal, not only bears the use of the amusement function of television set own, and simultaneously because television set has multiple peripheral hardware signal port, therefore television set is also the display terminal as various peripheral hardware.Along with peripheral product gets more and more, function is more and more abundanter, and user's switching signal source is play different video content and also become frequent.But current television set is when each switching signal source, all need the broadcasting process of the signal source before exiting switching, call the initialization data of the signal source after switching again, then the video data of the signal source after switching just is shown, cause like this handoff procedure of signal source slowly and Signal aspects slow, thus form vision stop at switching signal source, cause poor visual effect.
Summary of the invention
Main purpose of the present invention is that solution multimedia play equipment causes the technical problem of poor visual effect because switching signal source procedure is slow and Signal aspects is slow.
For achieving the above object, the invention provides a kind of changing method of signal source, the changing method of described signal source comprises the following steps:
When detecting detection instruction, whether each signal source passage detecting multimedia play equipment has signal to input;
Obtain the vision signal in the signal source passage having signal to input;
By obtain signal input signal source passage in Video signal encoding be cached to internal memory;
When detecting signal source switching command, from described internal memory, reading out the vision signal that the signal source passage after switching is corresponding, and show described vision signal.
Preferably, before the step of the vision signal in the signal source passage that described acquisition has signal to input, the changing method of described signal source also comprises:
The signal source passage inputted there being signal identifies.
Preferably, described acquisition have signal to input signal source passage in the step of vision signal comprise:
Obtain the vision signal in preset duration in the signal source passage having signal to input.
Preferably, described by obtain the step that the Video signal encoding in the signal source passage of signal input is cached to internal memory and comprise:
By obtain signal input signal source passage in encoding video signal;
Judge that whether the vision signal after described coding is identical with the vision signal be buffered in advance in internal memory;
If the vision signal after described coding is identical with the described vision signal be buffered in advance in internal memory, then the vision signal after described coding is deleted, and be buffered in the vision signal in internal memory in advance described in keeping;
If the vision signal after described coding is different from the described vision signal be buffered in advance in internal memory, be then buffered in the vision signal in internal memory described in the vision signal after described coding being replaced in advance.
Preferably, the instruction that the instruction produced when described detection instruction is instruction or the start of described multimedia play equipment of described multimedia play equipment timing generation or signal source button produce when triggering.
In addition, for achieving the above object, the present invention also provides a kind of switching device shifter of signal source, and the switching device shifter of described signal source comprises:
Detection module, for when detecting detection instruction, whether each signal source passage detecting multimedia play equipment has signal to input;
Acquisition module, for obtaining the vision signal in the signal source passage of signal input;
Cache module, for by obtain signal input signal source passage in Video signal encoding be cached to internal memory;
Read module, for when detecting signal source switching command, reading out the vision signal that the signal source passage after switching is corresponding, and showing described vision signal from described internal memory.
Preferably, the switching device shifter of described signal source also comprises:
Identification module, for identifying the signal source passage having signal to input.
Preferably, described acquisition module also for obtain signal input signal source passage in vision signal in preset duration.
Preferably, described cache module comprises:
Coding unit, for by obtain signal input signal source passage in encoding video signal;
Whether judging unit is identical with the vision signal be buffered in advance in internal memory for the vision signal after judging described coding;
Holding unit, identical with the described vision signal be buffered in advance in internal memory for the vision signal after described coding, then the vision signal after described coding is deleted, and be buffered in the vision signal in internal memory in advance described in keeping;
Replacement unit, different from the described vision signal be buffered in advance in internal memory for the vision signal after described coding, be then buffered in the vision signal in internal memory described in the vision signal after described coding being replaced in advance.
Preferably, described detection instruction or described multimedia play equipment timing produce instruction described multimedia play equipment start time produce instruction or signal source button trigger time produce instruction.
The switching method and apparatus of signal source of the present invention, by the detection of the signal input state (namely with/without signal input) of each signal source passage to multimedia play equipment, and the vision signal in the whole signal source passages having signal to input detected is carried out being cached in internal memory in advance, when user selects switching signal source channels, the vision signal directly reading buffer memory in advance from the signal source passage after switching shows, the vision signal eliminating the signal source passage after by switching is cached to the process of internal memory, thus the picture signal that can show sooner during signal source passage bridge after switching, vision when significantly reducing switching signal source channels stops, improve the visual effect of multimedia play equipment.
Accompanying drawing explanation
Fig. 1 is the flow chart of changing method first embodiment of signal source of the present invention;
Fig. 2 is the flow chart of changing method second embodiment of signal source of the present invention;
Fig. 3 is the flow chart of the refinement of step S30 in Fig. 1;
Fig. 4 is the high-level schematic functional block diagram of switching device shifter first embodiment of signal source of the present invention;
Fig. 5 is the high-level schematic functional block diagram of switching device shifter second embodiment of signal source of the present invention;
Fig. 6 is the refinement high-level schematic functional block diagram of cache module in switching device shifter the 3rd embodiment of signal source of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of changing method of signal source, the changing method of this signal source runs in multimedia play equipment (such as television set).
With reference to the flow chart that Fig. 1, Fig. 1 are changing method first embodiment of signal source of the present invention.
In a first embodiment, the changing method of this signal source comprises:
Step S10, when detecting detection instruction, whether each signal source passage detecting multimedia play equipment has signal to input;
Multimedia play equipment detecting real-time detects instruction, multimedia play equipment is when detecting detection instruction, whether each signal source passage detecting multimedia play equipment has signal to input, to confirm which signal source passage has signal to input, and which signal source passage no signal input.Multimedia play equipment does not detect detection instruction, does not carry out any operation or continue detecting detecting instruction.In the present embodiment, detection signal source channels inputs with or without signal, status signal by signal source passage feedback is determined, such as, when signal source passage has signal to input, the status signal of feedback is the first level (such as high level), and during the input of signal source passage no signal, the status signal of feedback is the second electrical level (such as low level) contrary with the first level state.
In the present embodiment, 1, to detect instruction can be the instruction that multimedia play equipment timing produces, and namely realizes the timing detection whether having signal to input to each signal source passage of multimedia play equipment; Such as, produce one detect instruction every 1 second, then timing detected once in 1 second.2, detecting instruction also can for the instruction produced when multimedia play equipment is started shooting, and whether namely multimedia play equipment just produces one when starting shooting and detects instruction, then have signal input to detect to each signal source passage during start.3, detect instruction can also be signal source button (such as, signal source channel selecting menu key) instruction that produces when triggering, namely when user presses signal source button, produce and detect instruction, whether have signal input to detect to each signal source passage.The generation detecting instruction can comprise one or more modes in above-mentioned three kinds of modes, produces and detects instruction and produce detection instruction when signal source button triggers, can exist simultaneously when namely multimedia play equipment timing produces detection instruction, start.
Step S20, obtains the vision signal in the signal source passage having signal to input;
When determining that the signal source passage of multimedia play equipment has signal to input, obtain the vision signal in one section of duration in this signal source passage (the signal source passage having signal to input), obtain the video data in the signal source passage all having signal to input respectively.When the signal source passage no signal input of multimedia play equipment, the vision signal do not obtained in this no signal input signal source channels can be performed, or do not do any operation, or whether continue to detect other signal source passages there is signal to input.
Step S30, by obtain signal input signal source passage in Video signal encoding be cached to internal memory;
After vision signal in the signal source passage having signal to input acquisition, call the coded program of this signal source passage, the Video signal encoding of acquisition is become video flowing, then the video flowing be encoded into is cached to internal memory (such as, Double Data Rate SDRAM) in relevant position (buffer address that different signal source passage is corresponding different), for multimedia play equipment reading displayed.
Step S40, when detecting signal source switching command, reads out the vision signal that the signal source passage after switching is corresponding from internal memory, and display video signal.
When user's switching signal source channels, multimedia play equipment detects signal source switching command, the vision signal that the signal source passage after switching is corresponding is read out: if the signal source passage after switching is the signal source passage having signal to input from internal memory, signal source passage after then namely the reading out switching video flowing be buffered in internal memory carries out Image semantic classification, and (Image semantic classification comprises image reading, image decoding, audio-visual synchronization process and display format adjustment), after completing Image semantic classification, display data are delivered to the CPU of multimedia play equipment, shown by CPU display channel, if the signal source passage after switching is the signal source passage of no signal input, then due in internal memory without the vision signal of signal source passage of this no signal of buffer memory input, therefore read less than signal, namely no signal shows.
The changing method of the signal source that the present embodiment proposes, by the detection of the signal input state (namely with/without signal input) of each signal source passage to multimedia play equipment, and the vision signal in the whole signal source passages having signal to input detected is carried out being cached in internal memory in advance, when user selects switching signal source channels, the vision signal directly reading buffer memory in advance from the signal source passage after switching shows, the vision signal eliminating the signal source passage after by switching is cached to the process of internal memory, thus the letter of the image after switching during signal source passage bridge, can be shown sooner, vision when significantly reducing switching signal source channels stops, improve the visual effect of multimedia play equipment.
Further, in a first embodiment, in step S20, the step obtaining the vision signal in the signal source passage having signal to input comprises: obtain the vision signal in preset duration in the signal source passage having signal to input.
The length of the vision signal obtained can preset, reasonably can set according to the surplus resources size of the CPU of concrete multimedia play equipment, such as more in the process of multimedia play equipment operation, when cpu resource is less, the duration of the vision signal obtaining the signal source passage having signal to input can be arranged smaller (such as 3 seconds, 5 seconds), thus the demand reduced the cpu resource of multimedia play equipment, reduce the burden of the CPU of multimedia play equipment, the use of multimedia play equipment is run more smooth and easy.
The changing method of the signal source of the present embodiment, by obtain have signal to input signal source passage in the duration of vision signal can sets itself, revise setting accordingly under can running burden according to the difference of multimedia play equipment, thus ensure that the operation smoothly of multimedia play equipment uses.
With reference to the flow chart that Fig. 2, Fig. 2 are changing method second embodiment of signal source of the present invention.
In a second embodiment, before step S20, the changing method of signal source also comprises:
Step S50, the signal source passage inputted there being signal identifies.
When detecting that the signal source passage of multimedia play equipment has signal to input, then by this signal source passage (the signal source passage having signal to input) mark out.The mode of mark can be multiple, such as, and 1, the option that this signal source passage is corresponding on interactive interface can be carried out high brightness and highlight or color background display etc.; 2, printed words such as " having/have signal " can be demonstrated by option corresponding on interactive interface for this signal source passage.In addition, the changing method of this signal source, also can when the signal source passage no signal input of multimedia play equipment, the option that signal source passage no signal inputted is corresponding on interactive interface carries out dull gray brightness display, or the option of the signal source passage correspondence on interactive interface no signal inputted carries out shielding (not showing); Or, option corresponding on interactive interface for the signal source passage of the signal source passage having signal to input and no signal input can be divided into two classes separately display (such as, being divided into " having signal " and " no signal " separately to show) by the changing method of this signal source.
The changing method of the signal source of the present embodiment, by the signal source having signal to input passage is identified, user can clearly be known, and which signal source passage has signal to input, avoid user when switching signal source channels, (include the signal source passage of signal input and the signal source passage of no signal input) between each signal source passage blindly handover operation, thus when making user's switching signal source passage, be switched to the signal source passage wanting to watch more accurately and efficiently.
With reference to the flow chart that Fig. 3, Fig. 3 are the refinement of step S30 in Fig. 1.
In the third embodiment, the step S30 of the changing method of this signal source comprises:
Step S301, by obtain signal input signal source passage in encoding video signal;
Call the coded program of the signal source passage of obtained vision signal, obtained Video signal encoding is become video flowing.
Step S302, judges that whether the vision signal after encoding is identical with the described vision signal be buffered in advance in internal memory;
By the vision signal (namely this signal source passage having signal to input has been buffered in the video flowing in internal memory) be buffered in advance in internal memory corresponding with the signal source passage that in internal memory, this has signal to input for the vision signal after coding is compared, to determine whether the vision signal in this signal source passage having signal to input upgrades, namely see that whether the vision signal after coding is identical with the described vision signal be buffered in advance in internal memory.
Step S303, if the vision signal after coding is identical with the vision signal be buffered in advance in internal memory, then deletes the vision signal after coding, and the vision signal that maintenance is buffered in internal memory in advance;
If comparison result is identical, illustrating that the vision signal in this signal source passage having signal to input does not upgrade, now without the need to using the vision signal after coding, the vision signal after coding is deleted, and the vision signal that maintenance is buffered in internal memory is in advance constant.
Step S304, if the vision signal after coding is different from the vision signal be buffered in advance in internal memory, then replaces the vision signal after coding the vision signal be buffered in advance in internal memory.
If comparison result is not identical, illustrate that the vision signal in this signal source passage having signal to input has renewal, then need to upgrade the vision signal be buffered in advance in internal memory that in internal memory, this signal source passage having signal to input is corresponding, use when being switched to signal source passage that this has signal to input to make multimedia equipment, what read is that up-to-date vision signal shows; Now this vision signal be buffered in advance in internal memory is useless, therefore the vision signal after coding is replaced the vision signal be buffered in advance in internal memory, be about to the vision signal be buffered in advance in internal memory remove, vision signal buffer memory after coding is formed the up-to-date vision signal be buffered in advance in internal memory, and whether the vision signal after encoding next time just compares identical with the up-to-date vision signal be buffered in advance in internal memory.
The changing method of the signal source of the present embodiment, vision signal in the signal source passage having signal to input by detection is with or without renewal, when upgrading, by replacing the vision signal be buffered in advance in internal memory corresponding in internal memory after the Video signal encoding newly obtained, avoid useless vision signal taking internal memory; Simultaneously without when upgrading, directly keep the vision signal be buffered in advance in internal memory corresponding in internal memory constant, the vision signal after coding is deleted, and does not carry out buffer memory, effectively reduce taking the cpu resource of multimedia play equipment.
The present invention further provides a kind of switching device shifter of signal source, the switching device shifter of this signal source runs in multimedia play equipment (such as television set).
With reference to the high-level schematic functional block diagram that Fig. 4, Fig. 4 are switching device shifter first embodiment of signal source of the present invention.
In a first embodiment, the switching device shifter of signal source comprises:
Detection module 10, for when detecting detection instruction, whether each signal source passage detecting multimedia play equipment has signal to input;
Detection module 10 is detected and is detected instruction, and detection module 10 is when detecting detection instruction, and whether each signal source passage detecting multimedia play equipment has signal to input, to confirm which signal source passage has signal to input, and which signal source passage no signal input.Detection module 10 does not detect detection instruction, does not carry out any operation or continue detecting detecting instruction.In the present embodiment, detection signal source channels inputs with or without signal, status signal by signal source passage feedback is determined, such as, when signal source passage has signal to input, the status signal of feedback is the first level (such as high level), and during the input of signal source passage no signal, the status signal of feedback is the second electrical level (such as low level) contrary with the first level state.
In the present embodiment, 1, to detect instruction can be the instruction that multimedia play equipment timing produces, and namely realizes the timing detection whether having signal to input to each signal source passage of multimedia play equipment; Such as, produce one detect instruction every 1 second, then timing detected once in 1 second.2, detecting instruction also can for the instruction produced when multimedia play equipment is started shooting, and whether namely multimedia play equipment just produces one when starting shooting and detects instruction, then have signal input to detect to each signal source passage during start.3, detect instruction can also be signal source button (such as, signal source channel selecting menu key) instruction that produces when triggering, namely when user presses signal source button, produce and detect instruction, whether have signal input to detect to each signal source passage.The generation detecting instruction can comprise one or more modes in above-mentioned three kinds of modes, produces and detects instruction and produce detection instruction when signal source button triggers, can exist simultaneously when namely multimedia play equipment timing produces detection instruction, start.
Acquisition module 20, for obtaining the vision signal in the signal source passage of signal input;
When determining that the signal source passage of multimedia play equipment has signal to input, acquisition module 20 obtains the vision signal in this signal source passage (the signal source passage having signal to input) in one section of duration, obtains the video data in the signal source passage all having signal to input respectively.When the signal source passage no signal input of multimedia play equipment, acquisition module 20 can not obtain the vision signal in this no signal input signal source channels, or do not do any operation, or whether allow detection module 10 continue to detect other signal source passages there is signal to input.
Cache module 30, for by obtain signal input signal source passage in Video signal encoding be cached to internal memory;
After vision signal in the signal source passage having signal to input acquisition, call the coded program of this signal source passage, the Video signal encoding of acquisition is become video flowing, then the video flowing be encoded into is cached to internal memory (such as, Double Data Rate SDRAM) in relevant position (buffer address that different signal source passage is corresponding different), for multimedia play equipment reading displayed.
Read module 40, for when detecting signal source switching command, reads out the vision signal that the signal source passage after switching is corresponding from internal memory, and display video signal.
When user's switching signal source channels, read module 40 detects signal source switching command, the vision signal that the signal source passage after switching is corresponding is read out: if the signal source passage after switching is the signal source passage having signal to input from internal memory, signal source passage after then namely read module 40 the reads out switching video flowing be buffered in internal memory carries out Image semantic classification, and (Image semantic classification comprises image reading, image decoding, audio-visual synchronization process and display format adjustment), after completing Image semantic classification, display data are delivered to the CPU of multimedia play equipment, shown by CPU display channel, if the signal source passage after switching is the signal source passage of no signal input, then due in internal memory without the vision signal of signal source passage of this no signal of buffer memory input, therefore read module 40 reads less than signal, and namely no signal shows.
The switching device shifter of the signal source that the present embodiment proposes, by the detection of the signal input state (namely with/without signal input) of each signal source passage to multimedia play equipment, and the vision signal in the whole signal source passages having signal to input detected is carried out being cached in internal memory in advance, when user selects switching signal source channels, the vision signal directly reading buffer memory in advance from the signal source passage after switching shows, the vision signal eliminating the signal source passage after by switching is cached to the process of internal memory, thus the letter of the image after switching during signal source passage bridge, can be shown sooner, vision when significantly reducing switching signal source channels stops, improve the visual effect of multimedia play equipment.
Further, acquisition module 20 also for obtain signal input signal source passage in vision signal in preset duration.
The length of the vision signal that acquisition module 20 obtains can preset, reasonably can set according to the surplus resources size of the CPU of concrete multimedia play equipment, such as more in the process of multimedia play equipment operation, when cpu resource is less, the duration of the vision signal obtaining the signal source passage having signal to input can be arranged smaller (such as 3 seconds, 5 seconds), thus the demand reduced the cpu resource of multimedia play equipment, reduce the burden of the CPU of multimedia play equipment, the use of multimedia play equipment is run more smooth and easy.
The switching device shifter of the signal source of the present embodiment, by obtain have signal to input signal source passage in the duration of vision signal can sets itself, revise setting accordingly under can running burden according to the difference of multimedia play equipment, thus ensure that the operation smoothly of multimedia play equipment uses.
With reference to the high-level schematic functional block diagram that Fig. 5, Fig. 5 are switching device shifter second embodiment of signal source of the present invention.In a second embodiment, the switching device shifter of signal source also comprises:
Identification module 50, for identifying the signal source passage having signal to input.
This signal source passage (the signal source passage having signal to input) when detecting that the signal source passage of multimedia play equipment has signal to input, then identifies out by identification module 50.The mode that identification module 50 identifies can be multiple, such as, and 1, the option that this signal source passage is corresponding on interactive interface can be carried out high brightness and highlight or color background display etc.; 2, printed words such as " having/have signal " can be demonstrated by option corresponding on interactive interface for this signal source passage.In addition, the identification module 50 of the switching device shifter of this signal source also can when the signal source passage no signal input of multimedia play equipment, the option that signal source passage no signal inputted is corresponding on interactive interface carries out dull gray brightness display, or the option of the signal source passage correspondence on interactive interface no signal inputted carries out shielding (not showing); Or, option corresponding on interactive interface for the signal source passage of the signal source passage having signal to input and no signal input can be divided into two classes separately display (such as, being divided into " having signal " and " no signal " separately to show) by the identification module 50 of the switching device shifter of this signal source.
The switching device shifter of the signal source of the present embodiment, by identification module 50, the signal source passage having signal to input is identified, user can clearly be known, and which signal source passage has signal to input, avoid user when switching signal source channels, (include the signal source passage of signal input and the signal source passage of no signal input) between each signal source passage blindly handover operation, thus when making user's switching signal source passage, be switched to the signal source passage wanting to watch more accurately and efficiently.
With reference to the refinement high-level schematic functional block diagram that Fig. 6, Fig. 6 are cache module in switching device shifter the 3rd embodiment of signal source of the present invention.
The technical scheme of the 3rd embodiment is based on the technical scheme of the first embodiment.In the third embodiment, cache module 30 comprises:
Coding unit 31, for by obtain signal input signal source passage in encoding video signal;
Coding unit 31 calls the coded program of the signal source passage of obtained vision signal, and obtained Video signal encoding is become video flowing.
Judging unit 32, for comparing the vision signal be buffered in advance in internal memory corresponding with this signal source passage in internal memory for the vision signal after coding;
Judging unit 32 is by comparing the vision signal (namely this signal source passage having signal to input has been buffered in the video flowing in internal memory) be buffered in advance in internal memory corresponding with the signal source passage that in internal memory, this has signal to input for the vision signal after coding, to judge whether the vision signal in this signal source passage having signal to input upgrades.
Whether holding unit 33 is identical with the described vision signal be buffered in advance in internal memory for judging the vision signal after encoding;
Holding unit 33 is by comparing the vision signal (namely this signal source passage having signal to input has been buffered in the video flowing in internal memory) be buffered in advance in internal memory corresponding with the signal source passage that in internal memory, this has signal to input for the vision signal after coding, to determine whether the vision signal in this signal source passage having signal to input upgrades, namely see that whether the vision signal after coding is identical with the described vision signal be buffered in advance in internal memory.
Replacement unit 34, different from the vision signal be buffered in advance in internal memory for vision signal in encoded, then the vision signal after coding is replaced the vision signal be buffered in advance in internal memory.
If comparison result is not identical, illustrate that the vision signal in this signal source passage having signal to input has renewal, then need to upgrade the vision signal be buffered in advance in internal memory that in internal memory, this signal source passage having signal to input is corresponding, use when being switched to signal source passage that this has signal to input to make multimedia equipment, what read is that up-to-date vision signal shows; Now this vision signal be buffered in advance in internal memory is useless, therefore the vision signal after coding is replaced the vision signal be buffered in advance in internal memory by replacement unit 34, be about to the vision signal be buffered in advance in internal memory remove, vision signal buffer memory after coding is formed the up-to-date vision signal be buffered in advance in internal memory, and whether the vision signal after encoding next time just compares identical with the up-to-date vision signal be buffered in advance in internal memory.
The switching device shifter of the signal source of the present embodiment, vision signal in the signal source passage having signal to input by detection is with or without renewal, when upgrading, by replacing the vision signal be buffered in advance in internal memory corresponding in internal memory after the Video signal encoding newly obtained, avoid useless vision signal taking internal memory; Simultaneously without when upgrading, directly keep the vision signal be buffered in advance in internal memory corresponding in internal memory constant, the vision signal after coding is deleted, and does not carry out buffer memory, effectively reduce taking the cpu resource of multimedia play equipment.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a changing method for signal source, is characterized in that, the changing method of described signal source comprises the following steps:
When detecting detection instruction, whether each signal source passage detecting multimedia play equipment has signal to input;
Obtain the vision signal in the signal source passage having signal to input;
By obtain signal input signal source passage in Video signal encoding be cached to internal memory;
When detecting signal source switching command, from described internal memory, reading out the vision signal that the signal source passage after switching is corresponding, and show described vision signal.
2. the changing method of signal source as claimed in claim 1, it is characterized in that, before the step of the vision signal in the signal source passage that described acquisition has signal to input, the changing method of described signal source also comprises:
The signal source passage inputted there being signal identifies.
3. the changing method of signal source as claimed in claim 1, it is characterized in that, the step of the vision signal in the signal source passage that described acquisition has signal to input comprises:
Obtain the vision signal in preset duration in the signal source passage having signal to input.
4. the changing method of the signal source according to any one of claim 1-3, is characterized in that, described by obtain the step that the Video signal encoding in the signal source passage of signal input is cached to internal memory and comprise:
By obtain signal input signal source passage in encoding video signal;
Judge that whether the vision signal after described coding is identical with the vision signal be buffered in advance in internal memory;
If the vision signal after described coding is identical with the described vision signal be buffered in advance in internal memory, then the vision signal after described coding is deleted, and be buffered in the vision signal in internal memory in advance described in keeping;
If the vision signal after described coding is different from the described vision signal be buffered in advance in internal memory, be then buffered in the vision signal in internal memory described in the vision signal after described coding being replaced in advance.
5. the changing method of signal source as claimed in claim 1, is characterized in that, the instruction produced when the instruction produced when described detection instruction is instruction or the start of described multimedia play equipment of described multimedia play equipment timing generation or signal source button trigger.
6. a switching device shifter for signal source, is characterized in that, the switching device shifter of described signal source comprises:
Detection module, for when detecting detection instruction, whether each signal source passage detecting multimedia play equipment has signal to input;
Acquisition module, for obtaining the vision signal in the signal source passage of signal input;
Cache module, for by obtain signal input signal source passage in Video signal encoding be cached to internal memory;
Read module, for when detecting signal source switching command, reading out the vision signal that the signal source passage after switching is corresponding, and showing described vision signal from described internal memory.
7. the switching device shifter of signal source as claimed in claim 6, it is characterized in that, the switching device shifter of described signal source also comprises:
Identification module, for identifying the signal source passage having signal to input.
8. the switching device shifter of signal source as claimed in claim 6, is characterized in that, described acquisition module also for obtain signal input signal source passage in vision signal in preset duration.
9. the switching device shifter of the signal source according to any one of claim 6-8, is characterized in that, described cache module comprises:
Coding unit, for by obtain signal input signal source passage in encoding video signal;
Whether judging unit is identical with the vision signal be buffered in advance in internal memory for the vision signal after judging described coding;
Holding unit, identical with the described vision signal be buffered in advance in internal memory for the vision signal after described coding, then the vision signal after described coding is deleted, and be buffered in the vision signal in internal memory in advance described in keeping;
Replacement unit, different from the described vision signal be buffered in advance in internal memory for the vision signal after described coding, be then buffered in the vision signal in internal memory described in the vision signal after described coding being replaced in advance.
10. the switching device shifter of signal source as claimed in claim 6, it is characterized in that, the instruction produced when the instruction produced when described detection instruction is instruction or the start of described multimedia play equipment of described multimedia play equipment timing generation or signal source button trigger.
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| CN201410435950.7A CN104320701B (en) | 2014-08-29 | 2014-08-29 | The switching method and device of signal source |
| PCT/CN2014/085882 WO2016029502A1 (en) | 2014-08-29 | 2014-09-03 | Signal source switching method and device |
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| CN104320701B (en) | 2018-03-02 |
| WO2016029502A1 (en) | 2016-03-03 |
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