CN110708486A - Television system and signal processing method thereof - Google Patents
Television system and signal processing method thereof Download PDFInfo
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- CN110708486A CN110708486A CN201810653273.4A CN201810653273A CN110708486A CN 110708486 A CN110708486 A CN 110708486A CN 201810653273 A CN201810653273 A CN 201810653273A CN 110708486 A CN110708486 A CN 110708486A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
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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
Abstract
The invention provides a television system, which comprises a selection circuit, a signal processing circuit, a control circuit and a setting circuit. The selection circuit selects and outputs an input video signal from a plurality of video signals according to a play instruction. The signal processing circuit applies a signal processing program to the input video signal according to an effect set value to generate a processed video signal for playing. The setting circuit comprises a register for temporarily storing the effect setting value and provides the effect setting value to the signal processing circuit. The control circuit includes a look-up table. In response to a storage requirement, the control circuit obtains the effect setting value stored in the register from the setting circuit and stores the effect setting value into the lookup table as a desired playing effect corresponding to the current input video signal.
Description
Technical Field
The present invention relates to television systems, and more particularly to playback effect control techniques in television systems.
Background
Television systems are important devices that are essential in most homes. In recent years, many tv systems are on the market that can not only play programs provided by tv providers, but also connect to internet or external storage devices to play multimedia files provided by these sources. The video and audio signals with different content properties have proper playing effects respectively. For example, the playing effect is that a scene which is rapidly changed in a sports program is suitable for being played in a smooth picture mode, and is suitable for being matched with larger volume and multi-channel sound effect to create a realistic sensation; the travel program with the theme of introducing natural scenery is suitable for being played in a fine picture mode, and usually does not need too much volume and special sound effect. Various audiovisual signals provided to a television system may have a predetermined playback effect. In the current television system, for example, if a certain television program is selected for viewing, the playing effect is not preferred by the user, and the setting needs to be manually modified through a remote controller or a control panel.
Fig. 1 shows a functional block diagram of a conventional television system. The instruction decoding circuit 105 is responsible for receiving and decoding a control signal and generating a corresponding instruction. For example, the control signal may be a signal sent manually by a user via a remote control or control panel of the television system. The selection circuit 110 is controlled by the play command generated by the command interpretation circuit 105, and is responsible for selecting one of the plurality of audio/video signals (e.g., a certain television program) as an input audio/video signal. The setting circuit 120 is controlled by the playback effect setting command generated by the command interpreting circuit 105, and accordingly provides an effect setting value, i.e. the image contrast, image chroma, image brightness, volume, sound effect, etc. desired by the user. The setting circuit 120 is provided with a register 120A for storing the current latest effect setting value; the setting circuit 120 updates the content of the register 120A every time a new playback effect setting command is received. The signal processing circuit 130 applies a signal processing procedure (e.g., increasing the gray level of the pixels to increase the brightness, and decreasing the amplitude of the audio signal to decrease the volume … …) to the input audio/video signal according to the effect setting value provided by the register 120A, thereby generating a processed audio/video signal for the audio/video playback device 140 to play.
In the current tv system, when the user changes the input video signal through the playing command, the setting circuit 120 may use the preset playing effect of the new input video signal as the initial value of the effect setting value, or may continue to use the effect setting value of the previous input video signal. For example, if the user switches to the sports program provided by the television provider during watching a movie file stored in the external storage device, the effect setting originally set for the movie file, for example, the 16:9 picture setting, may be continuously applied to the sports program after switching by the signal processing circuit 130. Then, the user must modify the content of the buffer 120A again through the playing effect setting instruction to change the effect setting value to the setting suitable for the sports program. At this time, if the user switches the input video signal from the sports program back to the previously interrupted movie file again, the effect setting value set for the sports program may be applied to the movie file by the signal processing circuit 130. As can be seen from the above description, the conventional method has a disadvantage that the user may need to issue a new playback effect setting command again for a new input video signal each time to achieve the desired playback effect.
Disclosure of Invention
In order to solve the above problems, the present invention provides a new television system and a signal processing method thereof.
An embodiment of a television system according to the invention comprises a selection circuit, a signal processing circuit, a control circuit, and a setting circuit. The selection circuit is used for selecting and outputting an input video signal from a plurality of video signals according to a play instruction. The signal processing circuit is used for applying a signal processing program to the input video signal according to an effect set value so as to generate a processed video signal for playing. The setting circuit is used for the signal processing circuit to access, and comprises a register for temporarily storing the effect setting value. In response to a storage requirement, the control circuit obtains the effect setting value stored in the register from the setting circuit and stores the effect setting value into a lookup table as a desired playing effect corresponding to the input video signal.
Another embodiment according to the present invention is a signal processing method for use in a television system. The signal processing method comprises the following steps: (a) applying a signal processing program to an input video signal according to an effect set value to generate a processed video signal for playing; and (b) in response to a storage request, storing the currently adopted effect setting value into a lookup table as a desired playing effect corresponding to the input video signal.
The advantages and spirit of the present invention can be further understood by the following detailed description of the invention and the accompanying drawings.
Drawings
Fig. 1 shows a functional block diagram of a conventional television system.
Fig. 2 is a functional block diagram of a television system according to an embodiment of the present invention.
It is noted that the drawings include functional block diagrams that represent various functional blocks that can be associated with one another. The drawings are not detailed circuit diagrams, and the connecting lines are merely used to represent signal flows. The various interactions between functional elements and/or processes need not be achieved through direct electrical connections. Moreover, the functions of the individual elements need not be distributed as shown in the drawings, and the distributed blocks need not be implemented by distributed electronic elements.
Description of the symbols
105. 205: instruction interpretation circuit
110. 210: selection circuit
120. 220, and (2) a step of: setting circuit
120A, 220A: buffer memory
130. 230: signal processing circuit
140. 240: video and audio playing device
250: control circuit
250A: lookup table
260: interrogation circuit
Detailed Description
An embodiment of a television system according to the present invention is a functional block diagram shown in fig. 2. The television system 200 includes an instruction decoding circuit 205, a selecting circuit 210, a setting circuit 220, a signal processing circuit 230, an audio/video playing device 240, a control circuit 250, and an inquiry circuit 260. How each circuit operates is described below.
The instruction decoding circuit 205 is responsible for receiving and decoding a control signal and generating a corresponding instruction. For example, the control signal may be a signal sent manually by a user through a remote control or a control panel of the television system 200, or may be a signal automatically generated by the television system 200 according to a default schedule. First, the play command generated by the command interpretation circuit 205 is mainly used to control the selection circuit 210 to select and output an input video signal from a plurality of video signals, i.e. a video signal to be played on the video playback device 240. For example, the audio/video signals may include, but are not limited to, television programs provided by the television provider, audio/video streams from the internet, and multimedia files provided by an external storage device.
The playback effect setting command generated by the command interpreting circuit 205 is used to change the effect setting value provided by the setting circuit 220, such as but not limited to, a picture mode (e.g., smooth mode, clear mode, etc.), an image resolution, an image contrast, an image chroma, an image brightness, an image color temperature, a noise suppression, a volume, and a sound effect. The register 220A of the setting circuit 220 is used for storing the current latest effect setting value. The setting circuit 220 updates the content of the register 220A every time a new playback effect setting command is received.
The signal processing circuit 230 applies a signal processing procedure to the input video signal according to the effect setting value provided by the register 220A to generate a processed video signal, and provides the processed video signal to the video playback device 240 for playback. It should be noted that the detailed method for performing the signal processing procedure according to the effect setting value is known by those skilled in the art, and is not described herein.
The control circuit 250 is controlled by the store request and the search request. The storage request may be generated by the instruction interpreting circuit 205 directly after analyzing the control signal (denoted as storage request a in the figure), may be generated by the setting circuit 220 in response to the playback effect setting instruction (denoted as storage request b in the figure), or may be triggered by the control circuit 250 itself in response to the playback instruction. Alternatively, the search request may be generated directly after the command interpreting circuit 205 parses the control signal, or may be triggered by the control circuit 250 itself in response to the play command. The response of the control circuit 250 when the store request or the search request occurs is first described below, and various generation mechanisms of the store request and the search request are further described below.
The control circuit 250 can know which video signal the current input video signal is from the play command. When a storage request occurs, the control circuit 250 obtains the effect setting value currently used by the signal processing circuit 230 from the register 220A, and stores the effect setting value in the lookup table 250A as a desired playing effect corresponding to the current input video signal. For example, if the storage request is triggered when the user watches a movie file stored in an external storage device, the control circuit 250 stores the effect setting currently used by the signal processing circuit 230 as the desired playing effect corresponding to the movie file.
The lookup table 250A is designed to store a plurality of different sets of audiovisual signals and their desired playback effects. For the multimedia files stored in the external storage device, the control circuit 250 may record the identification information field corresponding to the multimedia file in the lookup table as a device identifier of the external storage device and a file name of the multimedia file. For a tv program, the control circuit 250 may record the identification information field corresponding to the tv program in the lookup table as a channel identifier and a program name of the tv program.
When a search request occurs, the control circuit 250 searches the lookup table 250A for whether there is a desired playback effect corresponding to the current input av signal. If the control circuit 250 finds that the look-up table 250A stores the expected playing effect corresponding to the current input video signal, the expected playing effect can be directly output to the setting circuit 220, or the expected playing effect can be output to the setting circuit 220 after the user agrees. Once the setting circuit 220 receives the desired playing effect provided by the control circuit 250, the content of the buffer 220A is updated to the desired playing effect; the signal processing program applied to the input video signal by the signal processing circuit 230 is accordingly adjusted.
One embodiment of the storage requirement generated by the instruction interpretation circuit 205 is to set a specific key on the remote controller of the television system 200; whenever the user presses the button, the command interpretation circuit 205 generates a storage request a to the control circuit 250. In practice, the specific key may also be converted into an option in the operation menu of the television system 200 for the user to select.
In another embodiment, each time the query circuit 260 learns that the user selects a new input video signal through the play command, a message play request is sent, and the request signal processing circuit 230 adds a message window in the picture corresponding to the processed video signal to query the user whether to store the currently used effect setting value for the input video signal to be stopped from being played. If the user selects to grant the store via the remote controller, the instruction decoding circuit 205 generates a store request a.
An embodiment of the storage requirement triggered by the control circuit 250 itself is that, whenever the control circuit 250 knows that the user selects a new input video signal through the play command, the storage requirement is automatically triggered, that is, the last effect setting value adopted by the signal processing circuit 230 stored in the buffer 220A is taken out and stored in the lookup table 250A as the expected play effect corresponding to the input video signal to be stopped.
One embodiment of generating the storage requirement b by the setting circuit 220 is to send the storage requirement b to the control circuit 250 every time the setting circuit 220 receives a new playing effect setting command, so that the control circuit 250 stores the new effect setting value in the look-up table 250A as the desired playing effect corresponding to the current input video signal.
One embodiment of the command interpretation circuit 205 generating the search request is to set a specific key on the remote controller of the television system 200; upon detecting that the user presses the button, the command interpretation circuit 205 sends the search request to the control circuit 250. In practice, the specific key may also be converted into an option in the operation menu of the television system 200 for the user to select.
In another embodiment, each time the query circuit 260 learns that the user selects a new input video signal through the play command, a message play request is sent, and the request signal processing circuit 230 adds a message window in the frame corresponding to the processed video signal to query whether the user wants to restore the desired play effect that may have been previously stored for the input video signal to be played. If the user selects to approve the recovery via the remote controller, the command interpretation circuit 205 generates a search request notification to the control circuit 250.
When the search request is generated after the command interpretation circuit 205 interprets the control signal, if the control circuit 250 finds that the look-up table 250A does not store the expected playing effect corresponding to the current input video signal, the control circuit 250 may send the search result to the query circuit 260. In response to the search result, the query circuit 260 sends a message playing request, and the request signal processing circuit 230 adds a message window in the picture corresponding to the processed video signal to notify the user of the search result.
One embodiment of the control circuit 250 triggering the search request is that the control circuit 250 automatically triggers the search request to search whenever it knows that the user selects a new input video signal through the play command. In one embodiment, as long as the control circuit 250 finds the corresponding desired playing effect in the look-up table 250A, the desired playing effect is output to the setting circuit 220, thereby updating the content of the register 220A.
In another embodiment, if the control circuit 250 finds the corresponding desired playback effect in the lookup table 250A after triggering the lookup request, the lookup result is sent to the query circuit 260. In response to the search result, the query circuit 260 sends a message playing request, and the request signal processing circuit 230 adds a message window in the picture corresponding to the processed video signal to query the user whether to adopt the found desired playing effect for the new input video signal. If the user selects to approve the application via the remote controller, the command interpretation circuit 205 sends a command to notify the control circuit 250 to output the desired playback effect to the setting circuit 220.
Unlike the setting circuit 120 in fig. 1, the effect setting value provided by the setting circuit 220 is also affected by the desired playing effect output by the control circuit 250 in addition to the playing effect setting instruction from the user. By triggering the storage requirement, the user can store the favorite playing effect of the user aiming at the specific audio-video signal, even if the input audio-video signal is changed midway and a new playing effect is selected, when the specific audio-video signal is played again, the user can obtain the previously favorite complete playing effect again through triggering the searching requirement without resetting through a playing effect setting instruction. By adopting the embodiment of the invention, if the user frequently switches between the two image sources, the user does not need to reset the playing effect of the two image sources respectively, so that the inconvenience of the prior art to the user is greatly reduced, the customized preference setting is realized, and better user experience is created.
In practice, the control circuit 250 and the interrogation circuit 260 may be implemented using a variety of control and processing platforms, including fixed and programmable logic circuits such as programmable gate arrays, application specific integrated circuits, microcontrollers, microprocessors, digital signal processors. In addition, the control circuit 250 and the interrogation circuit 260 may be designed to perform their tasks by executing processor instructions stored in a memory. Moreover, the scope of the present invention is not limited to a particular storage mechanism. The register 220A and the lookup table 250A may comprise one or more volatile or non-volatile memory devices, such as random access semiconductor memory, read only memory, magnetic and/or optical memory, flash memory, and the like.
Another embodiment according to the present invention is a signal processing method for use in a television system. The signal processing method comprises the following steps: (a) applying a signal processing program to an input video signal according to an effect set value to generate a processed video signal for playing; and (b) if a storage requirement is generated, responding to the storage requirement, storing the currently adopted effect setting value into a lookup table as a desired playing effect corresponding to the input video-audio signal. It will be understood by those skilled in the art that various operational variations described previously in the description of the television system 200 may be applied to the signal processing method, and the details thereof are not repeated.
The above detailed description of the embodiments is intended to more clearly describe the features and spirit of the present invention, and is not intended to limit the scope of the present invention by the embodiments disclosed above. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the claims appended hereto.
Claims (20)
1. A television system, comprising:
a selection circuit for selecting and outputting an input video signal from the plurality of video signals according to a play instruction;
a signal processing circuit, which is used for applying a signal processing program to the input video signal according to an effect set value so as to generate a processed video signal for playing;
a setting circuit for the signal processing circuit to access, which comprises a buffer for temporarily storing the effect setting value; and
a control circuit, which contains a lookup table, responding to a storage demand, obtaining the effect setting value stored in the register from the setting circuit and storing the result setting value into the lookup table as a desired playing effect corresponding to the current input video signal.
2. The television system of claim 1, wherein in response to a search request, the control circuit searches the lookup table for the expected playback effect corresponding to the input video/audio signal; the setting circuit updates the effect setting value in the register according to the expected playing effect when the control circuit provides the expected playing effect.
3. The television system of claim 2, further comprising:
an instruction interpretation circuit is used for interpreting a control signal triggered by a user and responding to the playing instruction, the storage requirement or the searching requirement.
4. The TV system as claimed in claim 3, wherein the control circuit is configured to automatically trigger the search request when the selection circuit is about to change the input AV signal via the play command.
5. The television system of claim 3, further comprising:
an inquiry circuit, which is used to send a message playing request when the playing instruction indicates that the selection circuit changes the input video signal, and ask the signal processing circuit to present a message window through the processed video signal, and ask the user whether to search the expected playing effect for the input video signal to be played; when the control signal is interpreted as that the user agrees to search the expected playing effect, the instruction interpretation circuit generates and sends the search requirement to the control circuit.
6. The television system of claim 3, further comprising:
an inquiry circuit, which is used to send a message playing request when the playing instruction indicates that the selection circuit changes the input video signal, and ask the signal processing circuit to present a message window through the processed video signal, and ask the user whether to store the effect setting value for the input video signal to be stopped playing;
when the control signal is interpreted that the user agrees to store the effect setting value, the instruction interpretation circuit generates and sends the storage requirement to the control circuit.
7. The television system of claim 1, wherein the control circuit automatically triggers the storage request when the playback command indicates that the selection circuit is about to change the input video signal.
8. The television system of claim 1, wherein the effect settings comprise one or more of the following play effects: picture mode, image resolution, image contrast, image chroma, image brightness, image color temperature, noise suppression, volume, sound effect.
9. The television system of claim 1, wherein one of the plurality of audiovisual signals corresponds to a multimedia file stored in an external storage device, and the control circuit stores a device identifier of the external storage device and a file name of the multimedia file in the look-up table as identification information of the multimedia file.
10. The television system of claim 1, wherein one of the plurality of audiovisual signals corresponds to a television program, and the control circuit stores a channel identifier and a program name of the television program in the look-up table as an identification of the television program.
11. The television system of claim 1, wherein the setup circuit generates and sends the storage request to the control circuit in response to a play effect setup command for adjusting the effect setup value.
12. A signal processing method for a television system, comprising:
(a) applying a signal processing program to an input video signal according to an effect set value to generate a processed video signal for playing; and
(b) if a storage demand is generated, the currently adopted effect setting value is stored into a lookup table in response to the storage demand and is used as a desired playing effect corresponding to the input video-audio signal.
13. The signal processing method of claim 12, comprising:
(c) if a search requirement is generated, responding to the search requirement, and searching whether the expected playing effect corresponding to the input video and audio signal exists in the search table; and
and updating the effect setting value according to the expected playing effect.
14. The signal processing method of claim 13, further comprising:
interpreting a control signal triggered by a user and responding to the storage requirement, the searching requirement or the playing instruction.
15. The signal processing method of claim 14, further comprising:
when the playing instruction is known that the input video signal will change, the search requirement is automatically triggered.
16. The signal processing method of claim 14, further comprising:
when the playing instruction indicates that the input video-audio signal is about to change, a message window is presented to inquire whether a user stores the effect set value aiming at the input video-audio signal to be stopped to play;
wherein the control signal is interpreted as the storage request generated when the user agrees to store the effect setting value.
17. The signal processing method of claim 14, further comprising:
when the playing instruction indicates that the input audio-video signal changes, a message window is presented to inquire whether a user needs to search the expected playing effect aiming at the input audio-video signal to be played;
wherein, the control signal is interpreted as the searching requirement generated when the user agrees to search the expected playing effect.
18. The signal processing method of claim 12, further comprising:
the storage requirement is automatically triggered when the input video signal is to be changed.
19. The signal processing method of claim 12, further comprising:
the storage requirement is generated whenever a play effect setting instruction for adjusting the effect setting value is received.
20. The signal processing method of claim 12, wherein the effect setting value comprises one or more of the following playback effects: picture mode, image resolution, image contrast, image chroma, image brightness, image color temperature, noise suppression, volume, sound effect.
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| CN201810653273.4A CN110708486A (en) | 2018-06-22 | 2018-06-22 | Television system and signal processing method thereof |
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| CN201810653273.4A CN110708486A (en) | 2018-06-22 | 2018-06-22 | Television system and signal processing method thereof |
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Application publication date: 20200117 |