CN106658166B - Television program channel searching method, switching method and system - Google Patents
Television program channel searching method, switching method and system Download PDFInfo
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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 encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
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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 encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
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Abstract
The invention relates to a television program channel searching method, a switching method and a system, wherein the television program channel searching method comprises the following steps: selecting a current channel searching type from a wireless program type and a cable program type which are arranged according to a preset sequence, and taking the current channel searching type as a first program type; setting modulation modes of a tuner and demodulation equipment according to the current channel searching type and a preset channel searching area; searching television signals for a plurality of frequency points to be searched of the current channel searching type, and demodulating the searched television signals according to a modulation mode; acquiring program data of the television signal which is successfully demodulated, generating program information according to the program data and the corresponding frequency point to be searched, and storing the program information in a television program list; and taking the next program type as a new current channel searching type, and returning to the step of setting the modulation mode until the current channel searching type is the last program type. Therefore, the method can completely search and store different program types at one time, is simple to operate and is convenient for users to use.
Description
Technical Field
The invention relates to the technical field of televisions, in particular to a television program channel searching method, a television program channel switching method and a television program channel switching system.
Background
There are two general ways of receiving signals in a television system: wireless reception and wired reception. The television system needs to search for television programs of corresponding types according to the current signal receiving mode. For example, if the current mode is a wireless receiving mode, the search of wireless television programs can be carried out; if the current mode is the cable receiving mode, the search of the cable television program is carried out.
In a conventional television system, a user is generally required to select a current radio television program or cable television program in a menu, and the channel search storage or program switching is performed correspondingly according to a mode selected by the user. In this way, when the user needs to switch from the wireless television program to the cable television program or from the cable television program to the wireless television program, the user needs to select the television program type on the menu through the remote controller, and the operation is complicated.
Disclosure of Invention
In view of the above, there is a need to provide a method, a system and a program searching system for searching and switching tv programs, which are simple in operation and convenient for users to use.
A TV program searching method comprises the following steps:
selecting a current channel searching type from wireless program types and cable program types which are arranged according to a preset sequence, and taking the current channel searching type as a first program type;
setting modulation modes of a tuner and demodulation equipment according to the current channel searching type and a preset channel searching area;
acquiring a plurality of frequency points to be searched of the current channel searching type, searching television signals for the frequency points to be searched, and demodulating the searched television signals according to the modulation mode;
acquiring program data of the television signal which is successfully demodulated, generating program information according to the program data and the corresponding frequency point to be searched, and storing the program information in a television program list;
and when the current channel searching type is not the last program type, selecting the next program type as a new current channel searching type according to the preset sequence, and returning to the step of setting the modulation modes of the tuner and the demodulation equipment according to the current channel searching type and the preset channel searching area.
A television program search system, comprising:
the program type acquisition module is used for selecting a current channel searching type from wireless program types and cable program types which are arranged according to a preset sequence, and taking the current channel searching type as a first program type;
the modulation mode setting module is used for setting modulation modes of a tuner and a demodulation device according to the current channel searching type and a preset channel searching area;
the television program searching module is used for acquiring a plurality of frequency points to be searched of the current channel searching type, searching television signals for the frequency points to be searched and demodulating the searched television signals according to the modulation mode;
the program information storage module is used for acquiring program data of the television signal which is successfully demodulated, generating program information according to the program data and the corresponding frequency point to be searched and storing the program information in a television program list;
and a program type updating module for selecting the next program type as a new current channel searching type according to the preset sequence when the current channel searching type is not the last program type, and controlling the modulation mode setting module to set the modulation modes of the tuner and the demodulation device again according to the current channel searching type and the preset channel searching area.
According to the television program channel searching method and system, the current channel searching type is selected from the wireless program type and the cable program type which are arranged according to the preset sequence, and the current channel searching type is taken as the first program type; and then, carrying out a channel searching preparation process: setting modulation modes of a tuner and demodulation equipment according to the current channel searching type and a preset channel searching area; and then executing a channel searching process: searching television signals for a plurality of frequency points to be searched of the current channel searching type, and demodulating the searched television signals according to a modulation mode; the data storage process is finally executed: and acquiring program data of the successfully demodulated television signal, generating program information according to the program data and the corresponding frequency point to be searched, and storing the program information in a television program list. And when the current channel searching type is not the last program type, selecting the next program type as a new current channel searching type according to a preset sequence, and circularly executing a channel searching preparation process, a channel searching process and a data storage process until the current channel searching type is the last program type. Therefore, in the channel searching process, complete channel searching and storage can be performed on different program types at one time, a user does not need to use a menu to switch the channel searching, the operation is simple, and the user can use the channel searching conveniently.
A television program switching method comprises the following steps:
receiving a channel selection signal;
searching corresponding program information from a television program list according to the channel selection signal;
and receiving and demodulating a television signal corresponding to the program type according to the program information to obtain and display a television program, wherein the program type comprises a wireless program type and a cable program type.
A television program switching system comprising:
the signal receiving module is used for receiving a channel selection signal;
the information searching module is used for searching corresponding program information from a television program list according to the channel selection signal;
and the program display module is used for receiving and demodulating the television signals corresponding to the program types according to the program information to obtain and display the television programs, wherein the program types comprise wireless program types and cable program types.
According to the television program switching method and system, the corresponding program information is searched from the television program list according to the channel selection signal by receiving the channel selection signal, and the television signal of the corresponding program type is received and demodulated according to the program information to obtain and display the television program; wherein the program types include a wireless program type and a cable program type. Therefore, the television signal can be selected from the program information of different program types according to the channel selection signal, so that the program types of the television programs obtained by receiving the television signals and demodulating according to the program information are various, when a user needs to switch and watch the television programs of different program types, only the channel selection is needed, the program types do not need to be reselected through a menu, the operation is simple, and the use by the user is convenient.
Drawings
FIG. 1 is a flowchart illustrating a method for searching TV programs according to an embodiment;
FIG. 2 is a flowchart illustrating a method for searching TV programs according to another embodiment;
FIG. 3 is a flowchart illustrating a method for switching TV programs according to an embodiment;
FIG. 4 is a flowchart of a television program switching method in another embodiment;
FIG. 5 is a block diagram of a TV program searching system according to an embodiment;
fig. 6 is a block diagram of a tv program switching system according to an embodiment.
Detailed Description
Referring to fig. 1, a method for searching tv programs in an embodiment includes the following steps.
S110: and selecting a current channel searching type from the wireless program types and the cable program types which are arranged according to a preset sequence, and taking the current channel searching type as a first program type.
The wireless program type refers to wireless television programs received according to a wireless receiving mode, and the cable program type refers to cable television programs received according to a cable receiving mode. In this embodiment, the wireless program types include a wireless analog television program and a wireless digital television program, and the difference between the two types is that the formats of television signals are different, the format of the television signal of the wireless analog television program is an analog signal, and the format of the television signal of the wireless digital television program is a digital signal. Similarly, the cable program types include cable analog television programs and cable digital television programs. The preset sequence can be set according to actual needs. For example, in this embodiment, the preset sequence is arranged in sequence as a wireless analog television program, a wireless digital television program, a cable analog television program, and a cable digital television program. The first selected current channel searching type may be any one of a plurality of program types, or may be the first selected current channel searching type in a preset sequence.
S130: and setting modulation modes of a tuner and demodulation equipment according to the current channel searching type and a preset channel searching area.
The preset channel searching area refers to a preset area corresponding to the television signal. The preset channel searching area comprises any one of China, the United states and Europe. The tuner and the demodulation device are devices for receiving and processing Television signals, and the Modulation modes of the tuner and the demodulation device include NTSC (National Television Standards Committee), ATSC (Advanced Television systems Committee), PAL (Phase alternating Line Phase inversion), VSB (Vestigial Side Band Modulation), DVBT (Digital Video Broadcasting-Terrestrial Digital Television Broadcasting), DTMB (Digital Television Terrestrial Broadcasting transmission System frame structure, channel coding and Modulation) and QAM (Quadrature Amplitude Modulation). The modulation modes of the tuner and the demodulation device are unified, and need to be determined according to the current channel search type and the preset channel search area, and the modulation mode, the current channel search type and the preset channel search area can be obtained by table lookup or by searching the corresponding relationship between the modulation mode, the current channel search type and the preset channel search area. For example, when the current channel searching type is a wireless analog television program, if the preset channel searching area is china or europe, the modulation mode is set to be the PAL system; if the preset channel searching area is the United states, setting the modulation mode as the NTSC system; when the current channel searching type is a wireless digital television program, if the preset channel searching area is the United states, setting the modulation mode to be an 8VSB system, if the preset channel searching area is the Europe, setting the modulation mode to be a DVBT system, and if the preset channel searching area is the China, setting the modulation mode to be a DTMB system; when the current channel searching type is a cable analog television program, if the preset channel searching area is the United states, the modulation mode is set to be the NTSC system, and if the preset channel searching area is the China or the Europe, the modulation mode is set to be the PAL system; when the current channel searching type is a cable digital television program, if the preset channel searching area is the United states, Europe or China, the modulation mode is set to be QAM.
S150: acquiring a plurality of frequency points to be searched of the current channel searching type, searching television signals for the frequency points to be searched, and demodulating the searched television signals according to a modulation mode.
Each current channel searching type is corresponding to a plurality of frequency points to be searched in advance, and television signal searching is carried out on the frequency points to be searched, namely whether television signals corresponding to the current channel searching type exist on the frequency points is detected, and specifically, the television signals are searched through a high-frequency head according to preset intermediate frequency and bandwidth. If the television signal is searched, demodulating the television signal in a demodulation mode corresponding to the modulation mode through a high-frequency head and demodulation equipment, wherein if the demodulation is successful, the channel searching for the frequency point is successful; if no television signal exists or a television signal exists on the frequency point to be searched but the demodulation is not successful, the channel searching failure is indicated for the frequency point.
S170: and acquiring program data of the successfully demodulated television signal, generating program information according to the program data and the corresponding frequency point to be searched, and storing the program information in a television program list.
The program data includes parameters, such as modulation, required to demodulate the television signal. The program information comprises program data and frequency points to be searched corresponding to the program data, and the program information is stored, so that when a television program needs to be displayed subsequently, the corresponding television signal can be demodulated according to the program data in the program information. In this embodiment, all program data are stored in the same television program list.
S190: and when the current channel searching type is not the last program type, selecting the next program type as a new current channel searching type according to a preset sequence, and returning to the step S130.
The current channel searching type is not the last program type, which indicates that the channel searching of all program types is not finished yet, and at the moment, the channel searching is switched to the next program type until the channel searching of all wireless program types and cable program types is finished.
The television program searching method selects the current searching type from the wireless program type and the cable program type which are arranged according to the preset sequence, and takes the current searching type as the first program type; and then, carrying out a channel searching preparation process: setting modulation modes of a tuner and demodulation equipment according to the current channel searching type and a preset channel searching area; and then executing a channel searching process: searching television signals for a plurality of frequency points to be searched of the current channel searching type, and demodulating the searched television signals according to a modulation mode; the data storage process is finally executed: and acquiring program data of the successfully demodulated television signal, generating program information according to the program data and the corresponding frequency point to be searched, and storing the program information in a television program list. And when the current channel searching type is not the last program type, selecting the next program type as a new current channel searching type according to a preset sequence, and circularly executing a channel searching preparation process, a channel searching process and a data storage process until the current channel searching type is the last program type. Therefore, in the channel searching process, complete channel searching and storage can be performed on different program types at one time, a user can directly switch between television programs corresponding to different program types when in use, switching of program channel searching in a menu is not required, operation is simple, and the user can use the device conveniently.
In an embodiment, step S130 further includes, before the step S, a step of setting a channel searching area: displaying a plurality of selectable regions; and receiving a region selection instruction of a user, and acquiring a corresponding selectable region as a preset channel searching region according to the region selection instruction.
The selectable regions may include at least two of china, the united states and europe. By displaying the selectable area, the user can select one area as a preset channel searching area according to actual needs, and searches and demodulates the corresponding television signal according to the preset channel searching area. For a user who is located at the boundary position of two areas and can receive multi-area television signals, the user can independently select which area television signal is searched, and the independent selectivity of the user is improved.
In an embodiment, referring to fig. 2, after step S130 and before step S190, steps S161 to S164 are further included.
S161: the total number of wireless program types and cable program types is obtained.
The total number can be obtained by summing the number of the wireless program types and the number of the cable program types. In the present embodiment, the total number is 4.
S162: and acquiring the current serial number of the current channel searching type and the previous serial number of the current serial number by taking the serial number as the first program type in the preset sequence.
The current sequence number may be used to indicate the number of program types currently completing the search, and the sequence number previous to the current sequence number may be used to indicate the number of program types completing the search before the current search type.
S163: and calculating the percentage of the current sequence number to the total number and the percentage of the previous sequence number of the current sequence number to the total number to respectively obtain an upper threshold value and a lower threshold value.
The lower threshold value corresponds to a channel searching completion proportion when program information of a program type before the current channel searching type is stored, and the upper threshold value corresponds to a channel searching completion proportion when the program information of the current channel searching type is stored. By obtaining the upper threshold and the lower threshold, a variable range of the channel search completion ratio in the channel search process of the current channel search type can be obtained.
S164: and outputting the channel searching progress information according to the upper threshold and the lower threshold.
The channel searching progress information is used for prompting the current channel searching progress of the user, and can be output to a display for displaying. The channel searching progress information may be numerical range information determined according to a lower threshold and an upper threshold, for example: the total number is 4, when the current channel searching type is the first program type, the lower threshold value is 0%, the upper threshold value is 25%, and the corresponding channel searching progress information is 0% -25%; when the current channel searching type is a second program type, the lower threshold value is 25%, the upper threshold value is 50%, and the corresponding channel searching progress information is 26% -50% "; when the current channel searching type is the third program type, the lower threshold value is 50%, the upper threshold value is 75%, and the corresponding channel searching progress information is 51% -75%; when the current channel searching type is the fourth program type, the lower threshold is 75%, the upper threshold is 100%, and the corresponding channel searching progress information is 76% -100%. It is understood that in other embodiments, the channel searching progress information may be in other forms, for example, an arithmetic difference series with a lower threshold as a starting value, an upper threshold as an ending value, and a preset value as an arithmetic difference value may be output in order from small to large to be displayed.
Through outputting the information of the station searching progress, the user can be informed of the current station searching progress in time, the situation that the user exits from the station searching remotely at any time because of not knowing the progress is avoided, one party can improve the convenience of the user to use, and the other party can improve the stability of the station searching. In the present embodiment, steps S161 to S164 are executed after step S150; it is understood that in other embodiments, steps S161 to S164 may also be performed simultaneously with step S150.
In one embodiment, step S150 includes steps (a1) to (a 3).
Step (a 1): when the format of the television signal corresponding to the current channel searching type is an analog signal, acquiring a plurality of frequency points in a preset frequency range as frequency points to be searched.
The format of the television signal corresponding to the current channel searching type is an analog signal, namely, the current channel searching type is a wireless analog television program or a cable analog television program. The preset frequency range can be specifically set according to actual needs. Typically, analog signals correspond to valid television signals having a minimum frequency of 49.75Mhz and a maximum frequency of 855.25 Mhz. In this embodiment, the preset frequency range is 44.25Mhz-863.25Mhz, and includes frequency ranges of 49.75Mhz and 855.25Mhz, so that the search range is wide, omission does not occur, and the integrity of the channel search of the television program can be improved.
The frequency points to be searched may be all frequency points within a preset frequency range, or may be a plurality of frequency points selected at preset intervals. For example, in this embodiment, 44.25Mhz (megahertz) is used as the first frequency point to be searched, the preset interval is 1Mhz, and a plurality of frequency points to be searched are selected from the preset frequency range.
Step (a 2): and when the format of the television signal corresponding to the current channel searching type is a digital signal, acquiring the frequency point in the preset channel table as the frequency point to be searched.
The format of the television signal corresponding to the current channel searching type is a digital signal, namely, the current channel searching type is a wireless digital television program or a cable digital television program. The preset channel table includes physical channel numbers and frequency points, and each physical channel number corresponds to one frequency point.
Step (a 3): and searching the television signal for the frequency point to be searched, and demodulating the searched television signal according to the modulation mode.
When the format of the television signal is an analog signal, searching channels by scanning frequency points in a preset frequency range; and when the format of the television signal is a digital signal, searching the channel by searching a preset channel table. Therefore, the frequency points to be searched are determined according to the format of the television signal of the current channel searching type, the searching of different frequency points is realized, and the channel searching accuracy is high.
Referring to fig. 3, a method for switching television programs in an embodiment includes the following steps.
S210: a channel selection signal is received.
The channel selection signal is input by a user through a key or a remote controller, and can be digital information directly or a control instruction for indicating channel addition or subtraction.
S230: and searching corresponding program information from the television program list according to the channel selection signal.
In this embodiment, all program information is stored in the same television program list. And if the channel selection signal is a control instruction for indicating channel addition or subtraction, traversing the television program list according to the control instruction by taking the storage position of the program information corresponding to the currently displayed television program in the television program list as a starting point to search the corresponding program information. For example, if a channel selection signal is sent by a user operating a channel added key on a remote controller, a television program list is searched, next program information of program information corresponding to a currently displayed television program is acquired, a television signal corresponding to the next program information is received and demodulated to obtain the television program, and then the television program is displayed, so that program switching is realized. If the channel selection signal is digital information and the program information contains a corresponding program channel number, the corresponding program channel number can be acquired according to the digital information, and the corresponding program information is searched from a television program list storing the program information according to the program channel number.
S250: and receiving and demodulating the television signals of the corresponding program types according to the program information to obtain and display the television programs.
Wherein the program types include a wireless program type and a cable program type. There is a corresponding relationship between the program information and the program type, that is, the television program received and demodulated according to the program information may be a wireless program type or a cable program type.
The program information includes parameters required for demodulating the television signal. The specific method of receiving the television signal received in real time according to the program information and demodulating the television program can be implemented by using the existing known technology, for example, writing the frequency point to be searched and the program data in the program information into a tuner or a demodulation device, so that the tuner demodulation device receives the television signal at the frequency point to be searched and completes demodulation by using the modulation mode specified by the program information.
The television program switching method searches corresponding program information from a television program list according to the channel selection signal by receiving the channel selection signal, receives and demodulates television signals of corresponding program types according to the program information to obtain and display television programs; wherein the program types include a wireless program type and a cable program type. Therefore, the television signal can be selected from the program information of different program types according to the channel selection signal, so that the program types of the television programs obtained by receiving the television signals and demodulating according to the program information are various, when a user needs to switch and watch the television programs of different program types, only the channel selection is needed, the program types do not need to be reselected through a menu, the operation is simple, and the use by the user is convenient.
In one embodiment, the format of the television signal includes a digital signal and an analog signal. The program information corresponding to the television signal with the format of the analog signal comprises a frequency point to be searched and a corresponding modulation mode; the program information corresponding to the television signal with the format of the digital signal comprises a frequency point to be searched, a corresponding modulation mode and a program channel number. The modulation mode is set by the tuner and the demodulation device. In this embodiment, the program information corresponding to the television signal formatted as an analog signal may further include other parameters required for demodulating the television signal, such as an AFC (automatic frequency tracking) parameter. The program data corresponding to the television signal formatted as a digital signal may also include other parameters that need to be used to demodulate the television signal, such as program parameters PID (Packet Identifier), audio track, etc.
In an embodiment, referring to fig. 4, before step S210, step S201 to step S203 are further included.
S201: and adopting labels respectively corresponding to the wireless program type and the cable program type to mark the program information in the television program list according to the corresponding program types.
The tags corresponding to the wireless program genre and the cable program genre indicate that one tag corresponds to each program genre. For example, the label corresponding to the wireless analog tv program is "wireless analog", the label corresponding to the wireless digital tv program is "wireless digital", the label corresponding to the cable analog tv program is "cable analog", and the label corresponding to the cable digital tv program is "cable digital". According to the program type corresponding to the program information, the program information can be marked.
S202: and classifying and sequencing various program information according to the labels according to the preset sequence of the arrangement of the wireless program types and the cable program types.
The preset sequence is the arrangement sequence of the wireless program type and the cable program type. Program information is classified, and the program information of the same label belongs to the same class. The tags correspond to the wireless program types and the cable program types, so that the tags can be determined according to the preset sequence, and the program information marked by the tags can be sequenced. For example, the preset sequence is arranged in sequence as a wireless analog television program, a wireless digital television program, a cable analog television program, and a cable digital television program, and correspondingly, the sequence of the tags is wireless analog, wireless digital, cable analog, and cable digital, and various program information is arranged according to the sequence.
S203: and sequencing the program information of the same type with the television signal format being a digital signal according to the sequence of the program channel numbers from small to large, and sequencing the program information of the same type with the television signal format being an analog signal according to the sequence of the frequency points to be searched corresponding to the program information from small to large to obtain a sequenced television program list.
When the format of the television signal is a digital signal, the program information comprises program channel numbers, so that the same type of program information can be directly sequenced according to the program channel numbers. When the format of the television signal is an analog signal, the program information of the same type is directly sequenced according to the sequence of the frequency points to be searched from small to large, and the sequence number obtained by sequencing can be used as the program channel number corresponding to the frequency points to be searched.
In this embodiment, step S230 includes: and searching corresponding program information from the sorted television program list according to the channel selection signal.
The program information stored in the television program list is marked by adopting the label, and the program information is sorted and sorted, so that the stored program information is stored according to the arranged sequence, and the subsequent searching and calling are facilitated.
Referring to fig. 5, the tv program searching system in an embodiment includes a program type obtaining module 110, a modulation mode setting module 130, a tv program searching module 150, a program information storing module 170, and a program type updating module 190.
The program type obtaining module 110 is configured to select a current channel searching type from the wireless program types and the cable program types arranged according to a preset sequence, and use the current channel searching type as a first program type.
The modulation mode setting module 130 is configured to set modulation modes of the tuner and the demodulation device according to the current channel searching type and a preset channel searching area.
The tv program searching module 150 is configured to obtain a plurality of frequency points to be searched of a current channel searching type, search for a tv signal for the frequency points to be searched, and demodulate the searched tv signal according to a modulation mode.
The program information storage module 170 is configured to obtain program data of the television signal that is successfully demodulated, generate program information according to the program data and the corresponding frequency point to be searched, and store the program information in a television program list. In this embodiment, all program data are stored in the same television program list.
The program type updating module 190 is configured to select a next program type as a new current channel searching type according to a preset sequence when the current channel searching type is not the last program type, and control the modulation mode setting module 130 to set the modulation modes of the tuner and the demodulation device again according to the current channel searching type and the preset channel searching area.
In the television program searching system, the program type obtaining module 110 selects a current program searching type from the wireless program types and the cable program types arranged according to the preset sequence, and the current program searching type is taken as a first program type; and then, carrying out a channel searching preparation process: the modulation mode setting module 130 sets modulation modes of a tuner and a demodulation device according to the current channel searching type and a preset channel searching area; and then executing a channel searching process: the television program searching module 150 searches a plurality of frequency points to be searched of the current channel searching type for television signals and demodulates the searched television signals according to a modulation mode; the data storage process is finally executed: the program information storage module 170 obtains program data of the television signal successfully demodulated, generates program information according to the program data and the corresponding frequency point to be searched, and stores the program information in the television program list. When the current channel searching type is not the last channel searching type, the program type updating module 190 selects the next program type as the new current channel searching type according to the preset sequence, and controls the modulation mode setting module 130 to execute the corresponding function until the current channel searching type is the last program type. Therefore, in the channel searching process, complete channel searching and storage can be performed on different program types at one time, a user can directly switch between television programs corresponding to different program types when in use, switching of program channel searching in a menu is not required, operation is simple, and the user can use the device conveniently.
In one embodiment, the tv program searching module 150 includes a first obtaining unit (not shown), a second obtaining unit (not shown), and a searching and demodulating unit (not shown).
The first acquisition unit is used for acquiring a plurality of frequency points in a preset frequency range as frequency points to be searched when the format of the television signal corresponding to the current channel searching type is an analog signal.
Typically, analog signals correspond to valid television signals having a minimum frequency of 49.75Mhz and a maximum frequency of 855.25 Mhz. In this embodiment, the preset frequency range is 44.25Mhz-863.25Mhz, and includes frequency ranges of 49.75Mhz and 855.25Mhz, so that the search range is wide, omission does not occur, and the integrity of the channel search of the television program can be improved.
The second obtaining unit is used for obtaining the frequency points in the preset channel table as the frequency points to be searched when the format of the television signal corresponding to the current channel searching type is a digital signal.
The searching and demodulating unit is used for searching the television signals for the frequency points to be searched and demodulating the searched television signals according to the modulation mode.
When the format of the television signal is an analog signal, searching channels by scanning frequency points in a preset frequency range; and when the format of the television signal is a digital signal, searching the channel by searching a preset channel table. Therefore, the frequency points to be searched are determined according to the format of the television signal of the current channel searching type, the searching of different frequency points is realized, and the channel searching accuracy is high.
In an embodiment, the television program searching system further includes a number obtaining module (not shown), a serial number obtaining module (not shown), a ratio calculating module (not shown), and a progress prompting module (not shown).
The number acquisition module is used for acquiring the total number of the wireless program types and the cable program types.
The sequence number acquisition module is used for acquiring a current sequence number of the current channel searching type and a previous sequence number of the current sequence number by taking the sequence number as a first program type in a preset sequence.
The proportion calculation module is used for calculating the percentage of the current serial number and the total number and the percentage of the previous serial number of the current serial number and the total number to respectively obtain an upper threshold value and a lower threshold value.
And the progress prompting module is used for outputting the channel searching progress information according to the upper threshold and the lower threshold.
Through outputting the information of the station searching progress, the user can be informed of the current station searching progress in time, the situation that the user exits from the station searching remotely at any time because of not knowing the progress is avoided, one party can improve the convenience of the user to use, and the other party can improve the stability of the station searching.
Referring to fig. 6, the television program switching system in an embodiment includes a signal receiving module 210, an information searching module 230, and a program displaying module 250.
The signal receiving module 210 is used for receiving a channel selection signal.
The information searching module 230 is configured to search the corresponding program information from the television program list according to the channel selection signal.
The program display module 250 is configured to receive and demodulate a television signal corresponding to a program type according to the program information, so as to obtain and display a television program. Wherein the program types include a wireless program type and a cable program type.
In the television program switching system, the signal receiving module 210 receives a channel selection signal, the information searching module 230 searches corresponding program information from a television program list according to the channel selection signal, and the program display module 250 receives and demodulates a television signal of a corresponding program type according to the program information to obtain and display a television program. Wherein the program types include a wireless program type and a cable program type. Therefore, the television signal can be selected from the program information of different program types according to the channel selection signal, so that the program types of the television programs obtained by receiving the television signals and demodulating according to the program information are various, when a user needs to switch and watch the television programs of different program types, only the channel selection is needed, the program types do not need to be reselected through a menu, the operation is simple, and the use by the user is convenient.
In one embodiment, the format of the television signal includes a digital signal and an analog signal. The program information corresponding to the television signal with the format of the analog signal comprises a frequency point to be searched and a corresponding modulation mode; the program information corresponding to the television signal with the format of the digital signal comprises a frequency point to be searched, a corresponding modulation mode and a program channel number. In this embodiment, the program information corresponding to the television signal formatted as an analog signal may further include other parameters required for demodulating the television signal, such as an AFC parameter. The program data corresponding to a television signal formatted as a digital signal may also include other parameters needed to demodulate the television signal, such as program parameters PID, audio tracks, etc.
Correspondingly, in this embodiment, the television program switching system further includes a program type marking module (not shown), a program information classifying module (not shown), and a similar program sorting module (not shown).
The program type marking module is used for marking the program information in the television program list according to the corresponding program type by adopting the labels respectively corresponding to the wireless program type and the cable program type.
The program information classification module is used for classifying and sequencing various program information according to the labels according to the preset sequence of the arrangement of the wireless program types and the cable program types.
The program sorting module of the same kind is used for sorting the program information of the same kind with the television signal format being a digital signal according to the sequence of the program channel numbers from small to large, and sorting the program information of the same kind with the television signal format being an analog signal according to the sequence of the frequency points to be searched corresponding to the program information from small to large, so as to obtain a sorted television program list.
In this embodiment, the information searching module 230 is configured to search the ordered television program list for corresponding program information according to the channel selection signal.
The program information stored in the television program list is marked by adopting the label, and the program information is sorted and sorted, so that the stored program information is stored according to the arranged sequence, and the subsequent searching and calling are facilitated.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A method for searching TV programs is characterized by comprising the following steps:
selecting a current channel searching type from wireless program types and cable program types which are arranged according to a preset sequence, and taking the current channel searching type as a first program type;
setting modulation modes of a tuner and demodulation equipment according to the current channel searching type and a preset channel searching area;
acquiring a plurality of frequency points to be searched of the current channel searching type, searching television signals for the frequency points to be searched, and demodulating the searched television signals according to the modulation mode;
acquiring program data of the television signal which is successfully demodulated, generating program information according to the program data and the corresponding frequency point to be searched, and storing the program information in a television program list;
when the current channel searching type is not the last program type, automatically selecting the next program type as a new current channel searching type according to the preset sequence, and returning to the step of setting the modulation modes of the tuner and the demodulation equipment according to the current channel searching type and the preset channel searching area until the channel searching of all wireless program types and wired program types is completed;
the method comprises the following steps of setting a tuner and a demodulation device according to the current channel searching type and a preset channel searching area, and also comprises the following steps of: displaying a plurality of selectable regions; and receiving a region selection instruction of a user, and acquiring a corresponding selectable region as a preset channel searching region according to the region selection instruction.
2. The method as claimed in claim 1, wherein said obtaining a plurality of frequency points to be searched of the current channel searching type, searching the frequency points to be searched for television signals, and demodulating the searched television signals according to the modulation mode comprises:
when the format of the television signal corresponding to the current channel searching type is an analog signal, acquiring a plurality of frequency points in a preset frequency range as the frequency points to be searched;
when the format of the television signal corresponding to the current channel searching type is a digital signal, acquiring a frequency point in a preset channel table as the frequency point to be searched;
and searching the television signal for the frequency point to be searched, and demodulating the searched television signal according to the modulation mode.
3. The method as claimed in claim 1, wherein, after the step of setting the modulation modes of the tuner and the demodulator according to the current channel searching type and the preset channel searching region, and before the step of selecting the next program type as the new current channel searching type according to the preset sequence and returning to the step of setting the modulation modes of the tuner and the demodulator according to the current channel searching type and the preset channel searching region, the method further comprises:
acquiring the total number of the wireless program types and the cable program types;
acquiring a current serial number of the current channel searching type and a previous serial number of the current serial number by taking a serial number as a first program type in the preset sequence;
calculating the percentage of the current sequence number to the total number and the percentage of the previous sequence number of the current sequence number to the total number to respectively obtain an upper threshold value and a lower threshold value;
and outputting the channel searching progress information according to the upper threshold and the lower threshold.
4. The method according to any of claims 1 to 3, wherein the radio program types include radio analog television programs and radio digital television programs.
5. A television program search system, comprising:
the program type acquisition module is used for selecting a current channel searching type from wireless program types and cable program types which are arranged according to a preset sequence, and taking the current channel searching type as a first program type;
the modulation mode setting module is used for setting modulation modes of a tuner and a demodulation device according to the current channel searching type and a preset channel searching area;
the television program searching module is used for acquiring a plurality of frequency points to be searched of the current channel searching type, searching television signals for the frequency points to be searched and demodulating the searched television signals according to the modulation mode;
the program information storage module is used for acquiring program data of the television signal which is successfully demodulated, generating program information according to the program data and the corresponding frequency point to be searched and storing the program information in a television program list;
a program type updating module, configured to, when the current channel searching type is not the last program type, automatically select a next program type according to the preset sequence as a new current channel searching type, and control the modulation mode setting module to set the modulation modes of the tuner and the demodulation device again according to the current channel searching type and a preset channel searching region until channel searching of all wireless program types and cable program types is completed;
the method comprises the following steps of setting a tuner and a demodulation device according to the current channel searching type and a preset channel searching area, and also comprises the following steps of: displaying a plurality of selectable regions; and receiving a region selection instruction of a user, and acquiring a corresponding selectable region as a preset channel searching region according to the region selection instruction.
6. The TV program searching system as claimed in claim 5, wherein said TV program searching module comprises:
a first obtaining unit, configured to obtain, when a format of a television signal corresponding to the current channel search type is an analog signal, a plurality of frequency points within a preset frequency range as the frequency points to be searched;
a second obtaining unit, configured to obtain, when the format of the television signal corresponding to the current channel searching type is a digital signal, a frequency point in a preset channel table as the frequency point to be searched;
and the searching and demodulating unit is used for searching the television signals for the frequency points to be searched and demodulating the searched television signals according to the modulation mode.
7. The system of claim 5, further comprising:
the number acquisition module is used for acquiring the total number of the wireless program types and the cable program types;
a sequence number obtaining module, configured to obtain a current sequence number of the current channel search type and a previous sequence number of the current sequence number by using a sequence number as a first program type in the preset sequence;
a proportion calculation module, configured to calculate a percentage of the current sequence number to the total number and a percentage of a previous sequence number of the current sequence number to the total number, and obtain an upper threshold and a lower threshold, respectively;
and the progress prompting module is used for outputting the channel searching progress information according to the upper threshold and the lower threshold.
8. The system of any one of claims 5 to 7, wherein the radio program types include radio analog television programs and radio digital television programs.
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| CN108600857B (en) * | 2018-04-25 | 2020-09-25 | 海信视像科技股份有限公司 | Method for indicating state of TV signal source and smart television |
| CN108882012A (en) * | 2018-06-28 | 2018-11-23 | 广州视源电子科技股份有限公司 | Program searching method, system, equipment and television set |
| CN114697590B (en) * | 2022-03-01 | 2024-04-30 | 深圳创维－Rgb电子有限公司 | Channel searching method, system, intelligent terminal and computer readable storage medium |
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| JP4626737B2 (en) * | 2000-12-05 | 2011-02-09 | 船井電機株式会社 | Digital / analog television signal receiver |
| CN1278545C (en) * | 2003-11-04 | 2006-10-04 | 台达电子工业股份有限公司 | TV-set channel searching method |
| EP1706995A2 (en) * | 2003-12-22 | 2006-10-04 | THOMSON Licensing | Method and apparatus for performing selectable channel search |
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| CN101662602A (en) * | 2009-03-16 | 2010-03-03 | 青岛海信电器股份有限公司 | Method and system for sorting television channels |
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| CN102186040A (en) * | 2011-05-13 | 2011-09-14 | 四川长虹电器股份有限公司 | Quick channel searching method for digital analog television integrated machine |
| CN104735541A (en) * | 2015-03-24 | 2015-06-24 | 天津通信广播集团有限公司 | Search interface for displaying search content of digital television |
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