TW200948051A - Automatic switching apparatus and automatic switching method - Google Patents

Abstract

Disclosed is an automatic switching apparatus which switches automatically between a first signal representing a sound and an image, and a second signal represent a sound and an image, the second signal being operable to be a backup signal for the first signal, includes: switching means for receiving the first signal and the second signal, and for outputting any one of the first signal and the second signal based on a control signal; detection means for detecting a state, in which a first sound level is lower than a second sound level by a level not smaller than a judgment level, the switching means outputting a signal of the first sound level out of the first signal and the second signal; and switching control means for outputting the control signal for instructing to switch an output of the switching means to the signal of the second sound level.

Description

200948051 VI. Description of invention: [Reciprocal reference of related application] This application is based on Japanese Patent Application No. 2008-020823 and its application date is January 31, 2008, and its disclosure content is borrowed. This is incorporated by reference in its entirety. BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to an apparatus and method for automatic switching, and more particularly to a method for outputting a signal including an image and sound or an alternate signal thereof. [Prior Art] 设备 设备 The equipment in the TV (TV) broadcasting station uses a digital interface (serial digital interface) signal (hereinafter referred to as SDI signal) as the connection interface of the video device (standard name: SMPTE259M/292M) ).多 In the SDI signal, the audio signal is multiplexed into the (^ankmg) area of the video signal. Therefore, the video signal and sound can be simultaneously transmitted using the SDI signal. ^ Japanese Patent Publication No. 2〇〇3_2〇9712 and Japanese public patents! ^1948 discloses the transmission, including the active transmission system (hereinafter referred to as the active system), the standby two, the system called the standby (four) system, and the switching unit. When the audio / ίί / 夕二信传, to other Guangshi, cut fresh elements between the current system: the final uf 仏 and the audio / video multiplex signal from the standby system, and output The selected audio/video multiplex signal.笸^日^ Publicly open the public period for the number 712 or the Japanese public patent bulletin letter issued by the letter of the letter of the age of wealth. # In the current (four) towel generation video exchange unit will output the signal from the current system of audio / video Work ===_Multi-work letter*. The transmission system can be switched to the video signal by the switching status of the transmission system. In addition to detecting the video signal, the picture, and the status of the audio signal, the state of the audio signal needs to be extracted to cut the video signal. A block diagram of the audio/video multiplex signal 200948051 is switched according to the related art for the automatic switching device. The active system (hereinafter referred to as SYS1) includes an audio unit q. sound

The input level of the SYSH touch audio signal 45 is compared with J J 40, and detection information indicating the comparison result is generated. The heart > deficient value - the standby system (hereinafter referred to as SYS2) includes the audio detecting unit 42. The sound 42 compares the analog audio signal 4 input level 46' in SYS2 and produces side information of the result of the sample. K is used as a reference value Ο ❹ If the input level of the analog audio signal 45 is not less than the reference value for determination, the 4 frequency detecting units 41 and 42 respectively generate the stems, "the input level of the audio signal 45 is less than the judgment" ^^ If the analog sound frequency side unit 41 is used, the reference value 46 for determination used by the reference value 46 # 兀 42 is used. The information of the side of the detection unit 41 and the output of the detection unit 41 and 42 is as follows. For example, when the audio control unit 4 is used, the audio side unit 42 outputs the sound measurement i = change control. Unit 43 generates the indication by: ==^ control when two:: signal: sound; sound: "when 'and city' and based on the audio/video multiplexed by the switching control unit and sys2 from SYS1 audio/video The signal cuts the signal 'and switches between them. α from SYS2 audio / video multiplex signal according to the relevant technology, when the sound of SYS1 and so on and SYS2 sound 7 ^ 彳 5 准 position due to audio noise pollution or class number quasi-phase scale, audio side unit 41 200948051 and 42 may detect errors. Therefore, it is possible to switch between the audio/view b of SYS1 and the audio/video multi-wang signal of SYS2. = Lower Reference® 7B shows that when the analog audio signal 45 is detected by audio noise, it is detected. Assuming that only SYS1 is contaminated, the peak of the second peak becomes greater than the normal value when the audio signal 45 is contaminated like the second peak of the money in the figure (marked J is A). When the normal value is slightly smaller than the reference value for determination, the pollution effect of the audio noise is increased to the peak value of the analog audio signal 45, and the peak value becomes greater than the judgment value ^ = therefore 'although the sound noise should be determined if the noise is not contaminated The display shows "No Sound" but the Shangfeng is still incorrectly judged to display "Having Sound". In addition, if ^ ❹ ❹ ! 5 News 3 is the fourth peak from the left of the = (marked as "B"), the peak value of the four peaks becomes smaller than the normal value. When the normal value is slightly larger than the judgment ί reference value, the peak value of the _ _ signal 45 is subtracted from the pollution effect of the audio noise, and the peak value of the ^ becomes the reference value for the secret determination. Therefore, although the audio noise peak is judged to indicate "having a voice", the peak is incorrectly judged to be 2, ^, ,, and sound. The state of the signal in SYS1 is transmitted sequentially from left to right. ί Liang ί is available, none, and yes, and the state of the signal in sys2 is transmitted sequentially from left to right. Yes, No, Yes, Yes, and Have. Cat/, ^^^70: The timing chart shown will explain the sound of the city when the audio noise is polluted. In the towel, fake scale _ honest pollution SYS2. When the audio noise contaminates the audio signal of SYS2, the voice unit 42 generates new detection information indicating "with sound", and the frequency signal detection switch 42 provides the switching control unit 43 to indicate "having sound". Detection information. The switching control unit 43 switches the output of the signal from sysi to the sound, and then the signal of SYS2 is switched to the signal of SYS1 in the section where SYS1 displays "with sound" and SYS2 displays "none." Signal pollution, the output signal is cut by the signal of SYS1. Due to the noise of audio noise, the above output signal is =. In the example shown in Figure 7C, if the audio noise is not contaminated, only Jwa#唬It should be switched to the signal of SYS2. 200948051 [Summary] The device and method for automatically switching signals are provided. The audio noise pollution of the side unit causes the sound signal based on the sound signal to include: switching the signal of the first signal, the automatic switching device The protection device is configured to receive the first signal and the second signal, and is used for any of the signals; and the second signal; and the detecting device is not less than the judgment=' 'The first sound level is lower than the second sound position ^^ ί; and the switching control device is for outputting the signal that the output of the control device is switched to the second sound level. The automatic cutting representing the sound state In another method, the method is used to include a standby signal for the first signal in the method, the automatic switching level is not c;:=;;;:!::== two r is used to refer to

Sr; switching control step 丄 second sound operation; and output step 彳°唬 output any one of the first signal and the second signal. [Embodiment] An automatic switching device (first exemplary embodiment) in accordance with an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing automatic switching #(4) according to a first exemplary embodiment of the present invention. Block diagram. The automatic switching device can usually be referred to as an automatic boring machine. Change the condition of the device ^ device 7 comfort - eight (multiplexer Chuan, 峨 ^ 2, early 7L 13, early detection 14 and switching control unit 15. Detection unit 200948051 Η contains DMPX_A (demultiplexed H) 16 , DMPX_A 17 and no sound detection circuit 18 〇 usually can be called MPX-A11 as the first multiplex device. The multiplexer of the A/D conversion unit for the tone signal. /' Another stupid in sysi (current system) When recording bit image signal V1 and analog Μ, MPX-A11 converts analog sound health A1 into digital audio MPX-A U and increases the number of bribes to digital image _ V1, H ^ multiplex, number. ΜΡΧ·Α U provides Sound and image multiplex 2曰1 ❹ B^ DMPX·. Further-(4), the sound-image multiplex signal from Μρχ_Αη can usually be called the first signal representing the image and sound. Α 12 is called the second multiplexed skirt. The multiplexer of the A/D conversion unit for the tone signal. I, vocal... ί, when receiving the digital image domain V1 by λ, 2 (standby system) and the analog sound Hong A1, ΜΡΧ -Α 转换 Convert the analog sound signal A1 to d ^f to increase the number of sounds. The sound of the domain is like the V1 sound. It ttrPn 12 provides sound. The multiplex signal to the sound of the cut-h The multiplex signal is called the first-numbered signal, which is produced by X-Al2, which is generated by the fresh A 11 . The 2x1 switching unit 13 can be called the switching juxta. ·The sound-image multiplex signal generated by Α11 (hereinafter 彳_二细,钱(四)f ϋ ς ς 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 通常 侧 侧 侧 侧 侧 侧 侧 侧 侧<Measure a state in which 纟a is the sound level of the signal from the domain sound j outputted by the second signal to the second signal. The second and the first kth error detection t detecting unit 14 _- 曰 曰 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' The abnormal state: the sound level of the second signal is more than the hiding, the detection of the following is greater than or greater than the identification of the bullying. The sound level of the ^th is lower than the first level tff unit 15 is called the switching control device. When measuring the state below 7C 14 side, the output signal of the switching control switch 7C is switched to 2χ1, and the second 15 is 2x1, the switching unit U is from the first signal. The signal of the first: 准 The second level of 22 or greater than the criterion of the criterion is lower than the sound level of the signal output by the ί Ji - (4) and the second signal that is not switched by 2x1. The knife is changed from the first detection to the 13th. In the error state, the output of the switching control unit is switched from the first signal to the second signal two-switching unit 13 when the flute switching control unit !5 switches the 2χ1 switching unit 13 = to the first signal. For example, when the abnormal state is detected, when the switching control-switching signal is switched to the 2x1 switching unit 13 and the detecting unit 14 outputs the wrong state, the switching control unit 15 rims - Further detecting the error and detecting unit U outputting the first switching signal to the 2X1 switching unit 13 ο speaking in the ίη: switching signal, the 2x1 switching unit 13 outputs the first signal to take the second switching letter - Depending on the inclusion of Figure 1, DMPX-A 16 can generally be referred to as a first demultiplexing device. , MPX_A U provides the sound; image multiplex signal (the - ϊ ΐΓ ΐΓ ΐΓ Ι 声音 声音 , , , , , , , 转换 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供 提供A 17 is called the second demultiplexing device. 17^12 provides the sound image with multiple I signal (second apostrophe) into the digital sound field, and the scalar signal is replaced by the analog sound 9 200948051

Tone signal 2. DMPtA can generally classify the analog sound signal 2 to the silent side circuit 18. Silent Lie: Ϊ 9 detection circuit 18 is called a no-sound detection device. Signal), class-to-class ratio!: Road 18 is based on analog sound signal 1 (sound 3 in the first signal (number (the sound signal in the second signal) and 1/2 selection information picture 2 is _^: 1 change signal), the side error state and the abnormal state. It should be to the block diagram of the example of the sound detection circuit 18 in Fig. 1. The pair in Fig. 2 has the same figure as the zero parts according to Fig. 2 Reference No. 1 in 1 电路 Circuit (10). Specific shot; It! Detecting circuit 18 includes comparison circuit 18A and state detection circuit 23, 24 circuit 18 includes rectifier circuit 21, rectifier circuit 22, peak detector 18B contains (4) The soundless copper level setting circuit 3G, the measuring circuit 26, the logic circuit 27, the counters 28, 29. The comparison circuit 18 is referred to as a comparison device. When comparing the first switching signal (1/2 selection information 3), the comparison circuit 18 Α ratio And ι ί ϋ (the sound level of analog sound signal 1) and the sound level of the first critical and second comparative first signal (the sound level of analog sound signal 2) m + i ώ: more progress and stone 'the first The second critical value is greater than the first critical value to the g level, the m critical value and the second critical value side are determined to be no = When the second switching signal (1/2 selects information 3), the comparison circuit seems to compare the quasi-fresh two-turn value, and the sound comparison circuit 18 that rides the second signal provides a comparison result to the state detecting circuit 18Β. The measurement circuit 18 is referred to as a state detection device. The state detection circuit 18 detects a state as an error state, in which the comparison result issued by the comparison circuit represents: the sound position of the _th signal is at the first critical The value, and the sound level of the second signal is higher than the second threshold. For example, the 'status circuit 18 Β continues—the predetermined time side of the segment is one of the states, in which the comparator circuit 18 is used. The released treble level is lower than the first and the boundary value, and the second signal is 200948051. The 'state detection circuit 18 Β detects the state as one of the abnormal states, and the state is 'compared by the comparison circuit 18 发布. The result represents: the second = phoneme is lower than the first threshold, and the sound level of the first signal is higher than the threshold, and the 'state detection circuit 18 Β continues—the predetermined time of the segment is detected. a state, In this state, the comparison circuit 18 indicates that the sound level of the second signal is lower than the first threshold value, and the sound level is higher than the second threshold value. ❹ 整流 Normally, the rectifier circuit 21 can be used. It is called a rectifying device. The rectifying circuit rectifies the class and provides a rectified analog sound signal to the peak detecting circuit 3 to wire the stream circuit 22. The money circuit 22 rectifies the analog sound, and Provide rectified analog sound signal 2 to peak two fixed = can set the silk sound side setting as the scale side position accurate setting fen i sound detection level setting circuit 3G base ^ 1/2 selection information 3 ( A switch is made to determine the peak side circuit 23 and the first threshold (e.g., _56 dB) and the second threshold (e.g., _53 dB). Circuit—Na Xinlin, no sound gamma level setting the third threshold value in the path 23 and setting the peak _ 30 when receiving the 4 second switching signal, no sound detection level setting circuit 24 road 23 And the slave circuit _ circuit ^ can refer to the peak side circuit 23 as a high bee detecting device. The peak detection circuit 23 _ is analogous to the level of the sound signal 1 (the sound of the first signal, the threshold value set by the level setting circuit 30. The peak value of the level 1 counter 25 ° further, when the analog sound signal gate When the value is (ie, there is sound), the peak detecting circuit 23 outputs "1". 11 200948051 When the level of the analog sound signal 1 is lower than the output of the alpha detecting circuit 23, "〇" is displayed. When there is no sound), the peak Π Π 高峰 peak peak 24 is called Gao Ruoer W ^ 冋 gamma circuit 24 compare analog sound, _ device. Level) and the level of the sound detection level is set to 7 (first The signal sound circuit 24 outputs the comparison result to the counter %^ threshold. The level of the high bee detection ^ 2 is higher than the critical value (that is, there is sound) when the step is more advanced ^ when the analog sound signal is added, when the analog sound The level of signal 2 = 贞 / then circuit 24 rotates "! The detection circuit 24 outputs "〇". When the money is at the critical value (that is, there is no sound), the peak ❹ can usually refer to the counter 25 as the counting and charging. 1" (that is, there is sound), the counter I f ^ is the time that the Shangfeng sampling circuit 23 is connected. 1" (that is, there is a sound) A pre-pass can be used to refer to the counter 26 as a count 妒罟. When "1" is received (that is, there is a sound), the count = the time set by the Ma Feng anger circuit 24 is received. Keep L (that is, have a sound) for a period of 10 shifts. If you receive "1" (that is, there is a sound) - then 'the counters 25 and 26 remain "1". The logic circuit 27 can be called a decision device. ❹ sysi aTM and 〇UT2). Figure 2 shows 1^, de-paid, ] Γουτι'°r SYS1 is not working. 〇" corresponds to the pre-test to know the error status (only SYsil can be used, 28 is called the counting device. When receiving 0UT1 = "〇" (only scheduled ^ 曰), the counter 28 remains "0" (only SYS1 has no sound) - Segment syU can be called count split. When receiving 0UT2=“〇” (only when there is no sound day), counter 29 remains “〇” (only SYS2 has no sound) for a period of 12 200948051 Scheduled time [2] The two devices 28 and 29 remain "〇" for 60 seconds. The output of the S1 is added to the switching control unit 15 S2. The gift of the ceremony & 29 is supplied to the city control element is As an example, an exemplary embodiment of the present invention is shown in the following. An example of the operation of the rider 7 is described below. The digital sound and the analog sound are trusted by the MPX_A 11

The form of the Li it r multiplex signal is output. For example, the sound-image multi-sound 曰7唬1 is received by the no-sound detection circuit 18 (S10 磬: ίί17 is received, and the analog sound signal 2 is demultiplexed. The analog sound 曰 諕 1 is detected by no sound. The circuit 18 receives (S101). The W-no-detection circuit 18 selects the information based on the analog sound signals 1 and 2 and the W selection s', and the system does not have the information s = the system is received by the switching control unit 15. And S2 = the control unit 15 generates an i/2 selection information η signal or a second switching signal based on the information S1 and S2. 1/2 selection information 3 is switched by 2xl (j 13 is received, and then system switching is performed. In addition, '1/2 selection information 3 is fed back to no sound detection circuit 18. ^ Figure 2, analog sound signal 丨And 2 are respectively rectified by the no-detection circuit 18 and the whole circuit 21 and 22. Then, the rectified analog signal and the 2 are respectively received by the peak detecting circuits 23 and 24. The peak detecting circuit 23 The output is received by counter 25. The output of peak detector 24 is received by counter 26. Each of counters 25 and 26 has a function to maintain a sound for 10 seconds, for example, when a sound is detected once. Each of the outputs of 25 and 26 is received by logic circuit 27. The logic circuit 27 counter outputs the difference between the sound and the no sound in sysi and the sound in SYS2 based on the outputs of 25 and 26, respectively. And the difference between no sounds. The output of the logic circuit 27 is received by the counters 28 and 29 which are kept different for a predetermined period of time. For example, the counters 28 and 29 are kept different (no sound) 6 〇 ^. Further, the output S1 Contains only SYS1 With the result of voice, and outputs s2 containing sound only results of non SYS2. Ο

Referring to Fig. 1, switching control unit 15 switches the output of 2x1 switching unit 13 based on output S1 and output S2. Referring to Fig. 2, the output signal 3 (1/2 selection information) of the switching control unit 15 is also received by the no-sound detection circuit 18. Specifically, the 1/2 selection information 3 is received by the silent sound detection level setting circuit 30. ', ''', when receiving the 1/2 selection information 3 corresponding to the first switching signal, the helmet sound detecting level setting circuit 30 sets the first of the first critical history detecting circuit 24 in the peak detecting circuit 23. The second critical value (S102). When receiving the I/2 selection information 3 corresponding to the second switching signal, the level setting circuit 30 sets the second value of the peak detection circuit 23 and sets the peak detection circuit. The first critical value in 24 (si 〇 2). In an exemplary embodiment of the present invention, the first critical value and the second critical value (the silent detection level) are set to -56 dB and _53 respectively (13. The difference therebetween is, for example, when the 2X1 switching unit 13 outputs (4) The sound of the scene ^ scene ^ ^ ^ (4) H then f ^ 6dB set in the peak gamma circuit B ^ corresponding to SYS1, and ^ face to SYS2 riding gamma circuit 24 towel. Shame, SYS1 (four) '& The reference level of SYS2. Therefore 'the difference between the SYS1 and SYS2 J is not on the difference _, the secret SYS1 does not sound S1 indicates that only SYS1 has no sound (only SYS2 has sound), the ordering system At the same time, the ' 1/2 election service is also set by the fine line of the sound quality to the 200948051 threshold. - The setting is set in the middle of the peak circuit 24 corresponding to SYS2, and will be detected according to an exemplary embodiment. Unit 14 彳 彳 状 状 状 状 状 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 输出 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元 单元The unit does not output the signal. The switching status of the output of the 兀13 is switched to the reference level of 2x1 ❺// according to the 2x1 switching order below the sound level - no In the case where the g 2x1 switching unit 13 outputs the second signal, the sound signal level of the sound U 仏 of the second signal is not less than the determination bit. The level of quasi-level (si〇4) -, 至 to the time = sr switches the output of the 2x1 switching unit 13 according to the output state of the 2x1 switching unit 13. The sound level is lower than the second cut (four) sample, when The round "two · 准 ΐ ΐ 音 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = The level is compared with the first threshold, and at the same time, the sound level of the second signal is compared with the second threshold. In the case where the comparison circuit 18A receives the second switching signal ^ selection information 3), the comparison circuit 18A compares the first The sound of the signal is compared with the first threshold, and at the same time, the sound level of the second signal is compared with the first threshold. In this case, if the output of the switching control unit 15 is fed back, the status of the change can be changed. According to an exemplary embodiment, a threshold for detecting no sound is used The first threshold value and the second threshold value are used. In this case, if the output of the switching control unit 15 is fed back, the threshold for detecting no sound can be changed. Ο According to an exemplary embodiment, the state detecting circuit 18B detects For a predetermined period of time, as a state of an error state, in which the comparison result issued by the comparison circuit 18A indicates that the sound level of the first signal is lower than the first critical value, and the sound level of the second signal Further, the state detecting circuit 18B detects a state which is an abnormal state for a predetermined period of time. In this state, the comparison result issued by the comparing circuit 18A is output. The sound level of the 4th number is lower than the first critical value, and the sound level of the first signal is higher than the second critical value. °~ In general, sound noise rarely lasts for a long time. Therefore, unnecessary switching of system switching can be reduced due to noise pollution. (Second Exemplary Embodiment) Next, a second exemplary embodiment of the present invention will be described below. Referring to FIG. 4A, the second exemplary embodiment is the same as the first exemplary embodiment in the following: the soundless detecting circuit 18C shown in FIG. 4B is used as the sound detecting circuit 18 shown in FIG. The 1/2 selection information 3 (the first switching signal or the second switching signal) is not fed back to the no-sound detection circuit i8c by the switching control unit 15. As shown in FIG. 4B, the no-sound detection circuit 18 (including the arithmetic circuit 18C1 and the comparison determination circuit 18C2). The arithmetic circuit i8ci includes the rectification circuits 31, 32 and the low pass filter (LPF) 33, 34. And a shunt circuit 35. The comparison determining circuit 18C2 includes a comparator 36, and a low-pass filter 37, Hong. 16 ratio between the 200948051 level, the sound level of the shirt, the two signals, and the sound level of the second signal. The sound is different from the t-difference-signal two-determination device. The sound solution in the second position—the sound level of the non-domain is low. ❹===ϊ: The sound level of the signal is lower than the comparison of the money position. The decision circuit 丨8C2 is based on the __ result and the _! erroneous state, the second ratio t bt=(if=) the comparison of the susceptibility is the sound level of the first signal to the second level 'the ratio two signals The sound ====== The rectifier circuit 31 has a level greater than _ in Fig. 2. % jy is wide: the function of the circuit 22 is the same. 5 and % is called the city wave device. The low frequency machine 33 DC The DC^t passes through the high-frequency components in the outputs of the rectifying circuits 31 and 32, and only causes the wheel to advance: the predetermined level (8) can be increased to a low level. The pass filters 33 and 34 are: to prevent the cause of the output of the benefits 33 and 34 from being approximately large, for example, the predetermined bit #35 is referred to as a shunt device. The shunt circuit 35 provides the sound level of the No. 4 (input) The sound level of the segmented-signal (input 17 200948051 is the comparative judgment device. When the first-comparison value (such as G.5), the first sound level is smaller than when the second signal is Represents the error state. "〇". Normally, the low pass is discussed as 82. About the short-term noise of S1. It is called the wave device. The low-pass filter 37 removes the wave about the communication filter 38. The low-wave detector 38 removes - = J : 5 ^ and SYS2 has sound. P SYS1 is 6dB lower than SYS2 ' Determines S2 of the sound detection circuit 18A, switches the control unit 15 6dB, and the degree of reduction of SyUH, that is, The SYS1 reduces the greening of the exemplary embodiment, and the operation example of the monthly system switching device is described below with reference to the flowchart in Fig. 5. The price image signal* and the analog sound signal are connected by the WX-A11. Image multiplex signal. Sound and image multiplex signal is cut by 2x1 φ ^ΐΓιΓίϊί fiber The received sound, image and multiplex signal is multiplied by the sound money 1. The analog sound signal 1 is received by the no sound detection circuit 18C (S2〇1). The digit in the SYS2 The image signal and the analog sound signal are received by the MPX-A 12 and output as a sound-image multiplex signal. The sound _ image multiplex signal is received by the switch 13 13 , for example, via a fiber optic cable. The multiplex signal is received by DMPX-A 17/kg and the analog sound signal 2 is multiplexed. The analog tone signal 2 is received by the no-sound detection circuit 18C (S2〇1). , the specific signal, the signal 1 is received by the no-sound detection circuit 18C. Specifically, the analog sound signal 1 is received by the rectifier circuit 31. The low pass filter 33 removes the high frequency component from the output of the full stream circuit 31 and produces an 18 200948051 DC component which is the sound level of the first signal. Specifically, the analogy ί ^ H is received by the no-sound gamma path 18c. The analog sound day #υ 2 is removed from the output of the circuit 32 of the rectifier circuit 32 by the high-frequency component f % by the rectified DC component. The sound level of the first signal as the sound level of the first ## and the second letter 35 are generated, and the nth syllabus is calculated to enter the shunt circuit (S202). . The ratio of the sound level a to the sound level of the second signal ❹

The ratio (10) 2 is based on the calculated ratio between the ratio and the first comparison value. The comparison value indicates the gate of the first signal = the second circuit board is based on the calculated ratio and the second comparison value. State, the second comparison value indicates that the second signal level is low--(four), the sound is in the position of the level. When the error state is detected, the switching control unit 15 switches the unit 1 to The first signal is switched to the second signal (8) kiss. Further, when the side-to-normal tap switching control unit 15 switches the output of the 2x1 switching unit 13 from the second signal to the first signal (S206). In addition to the two cases mentioned above, no signal switching is performed (phantom 7). According to the exemplary embodiment, the comparison decision circuit 18C2 measures the error state and the abnormal state based on the result of the calculation of the arithmetic circuit 18C1 and the comparison result between the first comparison value and the second comparison value. Therefore, even if a slight sound level difference due to noise pollution occurs, the unnecessary switching operation on the system switching can be reduced. (Third Exemplary Embodiment) Further, MPX-A 11 and MPX-A 12 can be omitted by the automatic switching device according to each of the above-described exemplary embodiments. Fig. 6 is a block diagram showing an example of an automatic switching device according to a third exemplary embodiment. The automatic cutting of MPX-A 11 and MPX-A 12 19 200948051 described in the first exemplary embodiment. Further, the parts corresponding to those in Fig. 1 have the same figure! The intermediate phase_1 test is shown in Fig. 6. The automatic switching device receiving unit 13, the detecting unit, and the switching control mode have the following effects. ❹ ❹ According to the related technology, the problem of system switching is performed as necessary to make the sound 彳贞$丨| In addition, there is a slight sound level difference caused by non-sound noise pollution. 16卩^ The necessary cuttings occur. Further, the configuration described in the non-standard embodiment of the present invention is merely to appropriately change the critical value, the determination level, or the like, and the like. In addition to the month, the target f= caused the problem of sui and sys2 due to the influence of sound noise. Therefore, for example, when a lot of mistakes are issued in a short time = warmth causes the problem of frequent Nina _ _ 1 "& second:" can be converted to "audio", "speech" or the like. The word "shadow" can be interpreted as "video", or the like. The name of the brother is for the actor who is familiar with the record. The thief is familiar with this technique and can make π孰采+:^明°再再的'''’’’’’’’’’’’’’’ In the case of the = ίί== skill, the application to other exemplary implementations is limited to the exemplary implementations described herein, but will be defined by the restrictions imposed on A, the scope, and the equivalents. Maximum range. /, hit if into - step, we should pay attention to the inventor's intention: even in the trial period Η patent application axis is positive, still (four) towel material 剌 ride has quite = room 20 200948051 [simple description of the chart] The present invention and its advantages will become gambling from the above detailed description, in conjunction with the accompanying drawings, in which the schematic diagram of the spoofing feature diagram in accordance with the _ formula is shown as an example of the automatic switching apparatus according to the first exemplary embodiment. 2 is an example of the operation of the silent-free side circuit according to the first exemplary embodiment, and the operation of the second embodiment is based on the second exemplary embodiment. The measurement circuit 5 ί ί ί ί 图 ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί ί 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 依据 自动 自动 自动 自动 自动 自动 自动 自动Block diagram of the automatic switching device of technology [Key component symbol description] 1 analog sound signal _ 2 analog sound signal ♦

3 1/2 selection information π MPX-A

12 MPX-A 13 2x1 switching unit 14 detection unit 15 switching control unit

16 DMPX-A

17 DMPX-A 18 No sound detection circuit 18A Comparison circuit 18B State detection circuit 18C No sound detection circuit 200948051 18C1 18C2 21 22 23 24 25 26 27 28 © 29 30 31 32 33 34 35 36 37 US 38 — 41 42 43 44 45 46 5101 5102 5103 Arithmetic circuit comparison decision circuit rectifier circuit rectifier circuit peak detection circuit peak detection circuit counter counter logic circuit counter counter no sound detection level setting circuit rectifier circuit rectifier circuit low pass filter low pass Waveper shunt circuit comparator low-pass filter low-pass filter audio detection unit audio detection unit switching control unit 2x1 switching unit analog audio signal determination reference value first audio signal from the first audio/video multiplex signal Multiplex, and the second audio signal is demultiplexed by the second audio/video multiplex signal to select the first audio-video multiplex signal as the output signal, the first audio signal level is lower than the first threshold, and the second audio frequency Signal bit 22 200948051 S104 is higher than the second threshold. The first audio signal level is higher than the second threshold, and the second sound The signal level is lower than the first threshold value. 5105 5106 5107 5108 S201 Selecting the second audio-video multiplex signal as the output signal to maintain the state of the output signal selection. Selecting the first audio-video multiplex signal as the output signal to maintain the state of the output signal selection. The first audio signal is demultiplexed by the first audio-video multiplex signal, and the second audio signal is demultiplexed by the second audio-video multiplex signal 5202 ❹ 5203 5204 5205 5206 5207 to calculate the ratio of IN1 to IN2, Wherein IN1 is the DC component of the first audio signal, and IN2 is the ratio of the DC component IN1 to IN2 of the second audio signal is lower than the ratio of the first comparison value IN1 to IN2 is higher than the second comparison value, and the second audio-video is selected. The worker signal selects the first audio-video multiplex signal as the output signal as the output signal to maintain the state of the output signal selection ❹ 23

Claims (1)

200948051 VII. Patent application scope: An automatic switching device, which is a standby signal between a signal representing a sound and a second signal of a sound and a second signal, and the automatic switching signal can be used as a switching device. The system is configured to receive the first 1 gas containing: the second signal and output the first signal and the second signal, and the reference level is lower than the second sound level is not less than = In the state, the first sound ί is outputted by the first signal and the second signal to: = change; the device to (2) = how to indicate that the _ 2. if set, the signal - the sound bit准贞=1=The difference between the _testing device system 疋Now at least one of the sound levels of the determination level 丨°諕] The f control signal indicates the switch to the first 俨, Β When the sound of the second signal is lower than the second signal of the second signal and the sound is set to be switched to determine the level of the rim 7 determination, the control signal indicates that the control signal indicates a state of the switching number; Quasi-below the second of the first signal and the sound of the second signal (four) is performed _ to become Switching the positioning on time, a state of the system. 3. The scope of the patent application is as follows: The detecting device comprises: an automatic switching device, wherein the comparing device comprises: a --step I: ',: the sound-comparing portion of the 苐-signal, which is used Comparing the second signal - the sound 24 200948051 level and a second threshold value, the difference between the threshold values corresponds to the threshold value and the second critical state detecting device, which is used for _ = quasi; The comparison result of the r comparison part "to prepare for your W丨曰不τ knife to change to the first one, the first device is ready for use? The test device detects" === When the control signal indicates to switch to the first a signal indicating that the sound level of the first signal is lower than the first part to perform an insult reduction to switch the output to the second fresh day, the side device when the control signal indicates to switch to the second position ^ ",, and ❹ the first threshold value, and the state detecting device detects; the boundary value is lower than the running side to switch the output to the first signal". The detecting device 4 3 automatic switching device, the measuring device further includes a critical setting device &amp; The switching control device receives the control payment=4 setting for continuing the first-second time, the material/It is switched at the control signal to indicate the threshold value of the fourth (four) in the control signal, and the setting is lower than the first - Critical value. (4) In the case of the domain, the second threshold is set to 5. The automatic switching device of the jth item of the patent scope, wherein the detecting device comprises: a portion for using the sound level of the first signal The level of the position, the voice of the voice - Yang Xing, Hai Hai 4th, the sound of the operation - the ratio, and a comparative judgment department, which is at least 3 ratios and a first comparison value and - The lower comparison value of the comparison value indicates that the sound level of the first signal - and the sound level of the first first 彳 5 不 is not less than the one of the determination level 25 200948051, and the second The comparison value indicates that the sound level of the first signal of the second signal is not less than the pitch level is lower than = to be based on the sound level of the second signal; the sound level of the signal is large Calculating the ratio, the detection is performed to switch the output to the automatic shredding of item 5 of the range of Ο6·m, wherein the sound level and the i level are to the indication of the first signal. At least one of the 5 hoisting levels is calculated to calculate the ratio. 7. The automatic switching device of item 6 of the patent scope of the patent, the complex medium-level has the predetermined value of the impurity consumption as the pollution of the noise--, the first signal can be used for automatic switching between the 乜旒The first name Deng is used to receive the first signal and the second signal and the! The second signal outputs one of the first sound levels, the nickname, the singer, the singer, the singer, the singer, the singer, the singer, the singer, the singer, the singer, the singer, the singer, the singer, the singer Step: detecting a state in which: the first shoulder position and the flute-ϋ: ? is not less than a level of the determination level, and the first includes 9. Automatic switching as in item 8 of the patent application scope Method, 26 200948051, in order to switch to the first-wide when the control signal indicates that the sound level of the first signal is lower than the sound j 2 determination level of the second signal, The detecting is to switch the output: until the sound level is lower than the sound level of the first impurity, the detection is at least determined to be a state of switching the output to the first signal. ❹ 10. The automatic switching method of claim 8 of the patent scope further includes ... step 'for debt measurement: the first signal - the sound level and the ίίΐϊ first - comparison result, or one of the second signals The sound bit-different value comparison is one of the second comparisons S, which shows the sound bit ίϊί: the ί; the difference between the threshold value and the second rotation value corresponds to 0. A state detection step, When the control signal indicates switching to the first operation, the first self-definition value is lower than the second threshold value, and the first comparison result indicates that the sound level of the nickname is lower than the first threshold value, Detecting a state of the signal to be switched to the first signal; and indicating that the control signal indicates switching to the t-number, the second threshold is lower than the first threshold, and the comparison result displays the Lit signal When the sound level is lower than the second threshold, the detection is performed to become a state in which the knife is switched out to the first signal. η. The automatic switching method of claim </ RTI> </ RTI> further includes: a threshold setting step for receiving the control signal; and for using the control signal to switch to the first signal The threshold value is set lower than the value of the f; and is used to set the threshold value to be lower than the first threshold value when the control signal indicates switching to the second signal. 27 200948051 12. The automatic switching method of claim 8 of the patent scope further includes: a step of detecting the sound level of the first signal based on the sound level of the first signal or the ϊ 信号The value of the value (4) is greater than the ratio H-flavor value and the second comparison of the sound is: one of the quasi-sounds r_the-signal = ❹ 铜 copper step 'for the sound based on the second signal When the second comparison value is smaller than the first comparison value, the detection is performed to switch the wheel +^ and the sound position based on the second signal is used to lie on the object axis. ΐ 13. For the automatic switching method of claim 12, the method further includes: If the automatic switching method of claim 13 is applied, the bean has the estimated value of the predetermined value. - Noise 1 VIII, schema: 28