TW201445983A - Automatic selecting method for signal input source of playback system - Google Patents

Abstract

An automatic selecting method for signal input source of playback system is disclosed. The playback system includes a host, a player and a speaker. The host includes a plurality of signal input ports, in which one of the signal input ports is connected to the player. A processor in the host can select audio of one of the signal input port to be outputted to the speaker. The method includes controlling the player to output a predetermined audio to the host; detecting whether ambient sound includes the predetermined audio, if yes, it representing the signal input port of the host being connected to the signal output port of the player, if not, repetitively controlling the processing unit of the host to switch the signal input port and detecting the predetermined audio until the predetermined audio is detected. Thereby, the correct signal input source can be selected.

Description

Automatic selection method of signal input source of playback system

The present invention relates to a playback system, and more particularly to a method for automatically selecting a signal input source of a playback system.

With the advancement of technology, there are more and more types of players used in the home, such as DVD players, TV sets, TV games, CD players, MP3 players, and so on. These players are connected to the host of the playback system. In the case of televisions, these players are connected to the signal input port of the host of the TV (such as AV input port, fiber input port, HDMI, etc.) to transmit the video signal and sound signal of the player to the screen and speaker of the TV. Play. When the user wants to use one of the players, in addition to turning on the power of the player and the TV, it is necessary to manually select the signal input corresponding to the player on the remote control of the television remote control. Let the TV play the image and sound of the player.

This type of manual switching is still cumbersome for users who are familiar with digital products, and can still be used reluctantly. However, for users who are not familiar with operating digital products, such as the elderly, you may encounter the power to turn on the TV and the player, but do not know how to switch the TV to the correct signal input, resulting in no video or no TV. Sound output. If you can automatically select the source of the signal input, you can increase the convenience of use.

The main purpose of the present invention is to provide a method for automatically selecting a signal input source of a playback system, which can automatically select a source of signal input from a host.

In order to achieve the above object, the present invention provides a method for automatically selecting a signal input source of a playback system, the playback system including a host, a player and a speaker, wherein the host has a processing unit and a plurality of signal inputs, The player is electrically connected to one of the signal input ports of the host, and the speaker is electrically connected to the processing unit of the host, and the processing unit can receive the audio input by one of the signal inputs and output to the speaker for playing; The signal input source automatic selection method comprises the following steps: a, controlling the player to output a preset audio to the host; b, receiving the sound in the environment where the speaker is located; c, determining whether the received sound includes the pre- The audio message is set, if yes, the processing unit that maintains the host receives the current signal input and input audio, and if not, the processing unit that controls the host receives the input signal from another signal input, and repeats steps b and c.

Thereby, the signal input source automatic selection method can automatically switch the signal input source of the host to the signal input port connected to the used player, thereby increasing the convenience of use.

10‧‧‧ TV

12‧‧‧Host

121‧‧‧Processing unit

122‧‧‧Signal receiving module

124‧‧‧Signal input埠

14‧‧‧Speaker

20‧‧‧TV remote control

30‧‧‧ Player

32‧‧‧Signal receiving module

34‧‧‧ storage unit

36‧‧‧Signal output埠

40‧‧‧Video switching device

42‧‧‧Processing unit

422‧‧‧Electronic control module

424‧‧‧Filter module

424a‧‧‧Bandpass filter circuit

424b‧‧‧ Waveform detection circuit

424c‧‧‧ waveform shaping circuit

426‧‧‧Decoding module

428‧‧‧ Alignment module

44‧‧‧ button unit

46‧‧‧ memory

48‧‧‧Signal launch module

50‧‧‧ Radio Module

502‧‧‧Array microphone

504‧‧‧Signal amplification circuit

1 is a playback system to which a preferred embodiment of the present invention is applied.

2 is a flow chart of sound detection and control according to a preferred embodiment of the present invention.

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings. FIG. 1 is a playback system applied to an automatic selection method of a signal input source according to a preferred embodiment of the present invention. The playback system includes a television 10, a television remote controller 20, a player 30, and a video and audio switch. Device 40.

The television 10 has a main unit 12 and a speaker 14. The main unit 12 has a processing unit 121, a signal receiving module 122 and a plurality of signal input ports 124. In this embodiment, the speaker 14 is disposed on the host 12. The control unit 121 is electrically connected to the processing unit 121 of the host 12, and the host 12 can receive a control signal sent by the television remote controller 20 through the signal receiving module 122 to control the power of the host 12 or control the processing unit. 121 switches the signal input 埠124. The processing unit 121 receives the audio and video signals input from one of the signal input ports 124, and outputs the input audio to the speaker 14 to play the sound, and the image signal is output to the screen (not shown). . In this embodiment, the control signal is an infrared signal, but not limited thereto, and may be a wireless signal such as RF, Bluetooth, Zigbee, etc.; the signal input is a High Definition Multimedia Interface (HDMI). However, it is not limited to the limit, and it can also be a signal input port or a voice input port with a digital or analog source such as a fiber input port or an AV input port.

In this embodiment, the player 30 is a video player, but not limited thereto, and can also be a player that can output audio such as a video game, a CD player, an MP3 player, or the like. The player 30 has a signal receiving module 32, a storage unit 34 and a signal output port 36. The signal output port 36 is electrically connected to one of the signal inputs 124 of the host 12 of the television 10. The storage unit 34 stores a preset file, which is encoded into a file of the WAVE sound format by an encoded data to conform to the standard format of the sound output of the speaker 14 of the television 10. The player 30 receives a playback signal through the signal receiving module 32, and plays the preset file in the storage unit 34, and outputs a preset audio from the signal output unit 36. The preset audio is generated. The frequency of the audio is not audible to the human ear. In this embodiment, the frequency is between 15 kHz and 20 kHz. In practice, the frequency may be higher than 20 kHz or lower than 20 Hz.

The video switching device 40 includes a processing unit 42 and A button unit 44, a memory 46, a signal transmitting module 48, and a sound module 50 are electrically connected thereto. The processing unit 42 includes an electronic control module 422, a filter module 424, a decoding module 426, and a comparison module 428.

The button unit 44 is used for the user to control the host 12 of the television 10 and the player 30. In order to enable the video switching device 40 to control the host 12 to switch the signal input port 124, the control parameter corresponding to the control signal of the television remote controller 20 can be stored in the memory 46 of the video switching device 40 in advance. Therefore, after the button unit 44 is pressed, the electronic control module 422 obtains control parameters from the memory 46, and converts the control parameters into infrared control signals, and then sends the control signals to the host through the signal transmitting module 48 to be turned on. The power of the host 12 and the processing unit 121 controlling the host 12 select one of the signal inputs 124. The electronic control module 422 also transmits the broadcast signal to the player 30 through the signal transmitting module 48 to control the player 30 to play the preset file in the storage unit 34, and output the preset audio to The host 12 of the television 10 is the audio input from the signal input port 124 to which the player 30 is connected.

As shown in FIG. 1 and FIG. 2 , the sound receiving module 50 has an array microphone 502 and a signal amplifying circuit 504 . The sound receiving module 50 continuously receives ambient sound through the array microphone 502 and transmits the sound through the signal amplifying circuit 504 . After the amplification, an audio signal is output, and the array microphone 502 is used to increase the range and sensitivity of the radio. Since the sound in the environment includes frequencies that are audible and inaudible, the band-pass filter circuit 424a in the filter module 424 filters the audio signal to filter out unwanted frequency bands, and retains the The frequency band of the same frequency range of the audio is set, and then the waveform is removed by a waveform detecting circuit 424b and a waveform shaping circuit 424c, and a data signal is output after reshaping.

After receiving the data signal, the decoding module 426 decodes the data signal to obtain a decoded data and outputs the data. The comparison module 428 compares the decoded data with the encoded data, and determines the decoded data and the encoded resource. Whether the materials are the same: if so, the sound emitted by the speaker 14 includes the preset audio, that is, the currently selected signal input port 124 is the signal input port 124 to which the player 30 is connected. At this time, the processing unit 121 of the host 12 is maintained at the current signal input port 124, receives the audio input by the current signal input port 124, and the video switching device 40 sends a stop signal to the player 30 to stop playing. The preset file allows the user to perform other operations of the player 30.

If not, the sound generated by the speaker 14 does not include the preset audio, that is, the signal input 124 currently selected by the processing unit 121 of the host 12 is not the signal input port connected to the player 30. At this time, the video switching device 40 sends the control signal to the host 12 to control the processing unit 121 to switch to another signal input port 124. The processing unit 121 receives another audio input from the signal input unit 124, and the video switching device 40 performs sound reception, filtering, decoding, and comparison. If the decoded data and the encoded data are still different, the signal input is repeated. The switching of the 埠124 and the reception, filtering, decoding and comparison of the sound until the decoded data is identical to the encoded data.

Therefore, through the signal input source automatic selection method of the playback system of the present invention, whether the player 30 is connected to any of the signal inputs 124 of the host 12 of the television 10, the signal input source of the host 12 can be automatically switched to the source. The signal connected to the player 30 is input to 埠124. Even users who are unfamiliar with digital products can easily operate and effectively increase the convenience of use.

In the above, the host of the playback system is exemplified by the host of the television. In addition to the host of the television, the host of the playback system to which the present invention is applied may also be an audio amplifier, and the automatic selection method of the input source of the present invention is the same. The signal input 音响 of the sound amplifier can be automatically selected. In addition, the above description is only a preferred embodiment of the present invention, and the equivalent method variation of the specification and the scope of the application of the present invention should be included in the patent scope of the present invention. Inside.

Claims (7)

A method for automatically selecting a signal input source of a playback system, the playback system includes a host, a player and a speaker, wherein the host has a processing unit and a plurality of signal input ports, and the player is electrically connected to the host a signal input port, the speaker is electrically connected to the processing unit of the host, the processing unit can receive the audio input by one of the signal inputs and output to the speaker for playing; the automatic input method of the signal input source comprises the following steps : a, controlling the player to output a preset audio to the host; b, receiving the sound in the environment in which the speaker is located; c, determining whether the received sound is included in the received sound, and if so, maintaining the processing of the host The unit receives the current signal input and input audio. If not, the processing unit controlling the host receives the input signal from another signal input, and repeats steps b and c. The method for automatically selecting a signal input source of the playback system according to claim 1, wherein the preset audio is generated according to an encoded data; in step b, the received sound is converted into an audio signal, and the audio signal is converted into a The data is decoded; in step c, the manner of determining the preset audio is more than whether the encoded data matches the decoded data. The method for automatically selecting a signal input source of the playback system according to claim 2, wherein the step b further comprises: filtering the audio signal to retain the same frequency range of the audio signal as the preset audio, and converting to the decoding data. The method for automatically selecting a signal input source of the playback system according to claim 2, wherein the player has a preset file built therein, the preset file includes the encoded data for generating the preset audio; and the step a controls the playing. The preset file is played to output the preset audio to the host. The method for automatically selecting a signal input source of the playback system according to claim 1, comprising: obtaining a control signal for controlling a switching signal input of the processing unit of the host; and if the received sound does not include the preset audio in step c, Sending the control signal controls the processing unit of the host to switch the signal input port to receive another audio input and input audio. The method for automatically selecting a signal input source of the playback system according to claim 1, wherein the step c further comprises stopping outputting the preset audio. The method for automatically selecting a signal input source of the playback system according to claim 1, wherein the sound frequency corresponding to the preset audio is between 15 kHz and 20 kHz.