JP4799106B2 - Delay time input device and delay time input method - Google Patents

Description

  The present invention relates to a delay time input device and a delay time input method used for broadcasting and the like, and more particularly to a time delay processing function of a volume adjustment (mixing) device.

  In audio recording and editing work involving video such as television broadcasting, time delay of video with respect to audio occurs due to various factors. The delay time added to the sound to ensure consistency with respect to the difference between the video and the sound is determined by the operator (operator) by determining the time interval caused by the difference between the video and the sound, and is sent to the time delay processing unit of the sound adjustment device. Must be set. In particular, in live broadcast, it is required to instantly specify the time interval and set a delay time.

  Conventionally, such a delay time is set mainly by a method in which an operator directly inputs a numerical value by himself or herself using a keyboard or the like, or by rotating an encoder in increments of one step (rotation angle). ) Has been used to increase or decrease the numerical value according to.

  Also, by changing the time interval per step from several milliseconds to several hundred milliseconds according to the rotation speed of the encoder, if the encoder is rotated slowly, a fine time interval can be set. There is also known a technique in which the delay time is set to be large even at the same rotation angle when the rotation is performed quickly.

Further, as described in Patent Document 1, a means for measuring the relative delay difference between the video signal and the audio signal is separately incorporated in the video / audio delay adjusting device itself, and the time generated between the video and the audio by this means. There has also been a technique for automatically setting a delay time by measuring the interval without bothering humans.
JP 2005-101782 A

  Among the various conventional techniques as described above, the method in which the operator directly inputs a numerical value by himself / herself using a keyboard or the like for the delay time grasped based on the difference between the audio signal and the video signal is as follows. Accurate identification depends largely on the operator's own ability. In other words, it is natural that a person with abundant experience in numerical input can specify the delay time more accurately than an inexperienced person, but this method specifies the delay time by human sense. However, even an experienced operator often has errors in the order of several milliseconds that are difficult to judge depending on human senses, and lacks accuracy.

  Further, such a method by numerical input requires a new numerical input even when the input delay time is further finely adjusted. Each time, the operator determines the delay time himself and inputs it to the keyboard or the like. To carry out the work in stages, the operator was burdened with a great burden.

  On the other hand, using the rotation of the encoder to increase or decrease the value in increments of 1 step is just an adjustment of the rotation angle of the encoder, and the operation of changing the delay time grasped by the operator to a value is also possible. Since the input operation of the delay time is not necessary and a simple rotation operation is required, the operation itself is simplified as compared with the numerical value input.

  However, in the time delay processing unit that performs processing for adding the delay time of the specified video to the sound, it is required that the delay time is detected in units of several milliseconds when performing the sound output. In many cases, the delay time is several seconds. In such a case, if the delay time per step is fixed to several milliseconds, it is difficult to set a long delay time in units of several seconds, and it takes time to finally output an accurate delay time. Cost.

  Further, in the method of changing the time interval per step from several milliseconds to several hundred milliseconds according to the rotational speed of the encoder, even if the rotational angle of the adjustment knob is the same, the rotational speed Since it can be adjusted between several milliseconds and several hundred milliseconds, it can be used to set a long delay time in units of several seconds, compared to the method in which the delay time per step is fixed as described above. There is.

  However, according to this method, it is difficult for the operator to predict how much the value will change at what rotation speed. Adjustments by the operator were difficult, such as exceeding the numerical value. Further, as a configuration for realizing such a method, a configuration for detecting a rotation speed and changing a delay time per step assigned to the same rotation angle is also necessary.

  Further, in the case of the configuration described in Patent Document 1, a means for automatically detecting the delay time of the video signal with respect to the audio signal, such as a relative delay difference measurement unit, is required. There were drawbacks that made it more complicated.

  The present invention has been proposed in order to solve the above-described problems of the prior arts, and the object of the present invention is to be able to quickly and accurately set the delay time of video with respect to audio by a simple method. It is an object to provide a delay time input device and a delay time input method.

  In order to achieve the above object, according to the first aspect of the present invention, an operator grasps a time delay processing unit that performs a delay process on an audio signal in order to eliminate a delay of the video signal with respect to the audio signal. In a delay time input device for inputting a delay time between the audio signal and the video signal by using an encoder, an encoder having an operation unit that can be rotated and pressed, and a rotation amount of the operation unit are detected and rotated. Based on a predetermined delay time assigned for one step of movement, a rotary time setting unit that calculates a delay time associated with the rotation amount of the operation unit, and a start signal and an end signal output by the pressing operation of the operation unit The internal clock counter unit for starting and ending counting of the internal clock according to the start signal and the end signal from the reception unit, and the internal clock An elapsed time calculation unit that calculates an elapsed time between the start signal and the end signal based on a count value by the counter unit, a delay time calculated by the rotary time setting unit, and an elapsed time calculation unit And an addition unit that adds the elapsed time and outputs the result to the time delay processing unit.

  According to a second aspect of the present invention, in the first aspect of the present invention, the operation section transmits a start signal by a first press and transmits an end signal by a second press.

  According to a third aspect of the present invention, in the first aspect of the present invention, the operation unit transmits a start signal by pressing, and transmits an end signal by releasing the operation unit continuously pressed. It is characterized by that.

  According to a fourth aspect of the present invention, in the first, second, or third aspect of the present invention, the operation unit includes a knob that rotates the encoder and a button that outputs a start signal and an end signal. It is formed in the body.

  According to a fifth aspect of the present invention, the invention of the first aspect is grasped from the viewpoint of a method, and a time delay processing unit that performs a delay process on an audio signal in order to eliminate a delay of the video signal with respect to the audio signal. On the other hand, in the delay time input method in which the delay time between the audio signal and the video signal ascertained by the operator is input using an encoder, the operation unit is provided with an encoder that can be rotated and pressed. A predetermined delay time is assigned to one step of the movement amount, and a delay time setting start and end are assigned to the pressing operation of the operation unit, and the delay time set by the pressing operation of the operation unit and the rotation amount of the operation unit And adding the delay time according to the output time, and outputting the added delay time to the time delay processing unit.

  As described above, according to the present invention, the delay time in units of several seconds can be roughly specified by the pressing (or releasing) operation of the operation unit by the operator, and the fine delay time in units of several milliseconds. Fine adjustment is possible by turning the operation unit for each step. As a result, even when a relatively long delay time is set, the delay time can be input accurately with a simple operation. In particular, the input of the delay time due to the pressing operation of the operation unit is performed by the operator pressing (or releasing) the operation unit in accordance with the cue portion of the audio signal and the video signal. Compared with the case where the input is performed by rotating the input, there is an advantage that the operation timing can be easily taken and the input accuracy is high and there is no skill even in the case of a relatively long delay time.

  Next, the best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described with reference to FIGS.

[1. Configuration of Embodiment]
FIG. 1 shows an overall configuration of a delay time input device according to the present embodiment. This delay time input device includes a rotary encoder 10 having a rotating and pressing type operation unit 11 and a press of the operation unit 11. A pressing time setting unit 20 that calculates an elapsed time according to an operation, a rotating time setting unit 30 that also calculates a delay time according to a rotating operation of the operation unit 11, the pressing time setting unit 20, and the rotating time. The time delay processing unit 40 is configured to receive the elapsed time and the delay time calculated by the setting unit and to perform a predetermined time delay process on the audio signal.

  The operation unit 11 is composed of, for example, a substantially frustoconical knob, and the knob can turn left and right (forward and reverse) about the axis of the encoder 10 and protrudes and retracts along the axial direction of the encoder 10. It is configured freely. A spring 12 is provided on the outer periphery of the shaft portion of the knob constituting the operation portion 11 so that when the operation portion 11 is pushed in the axial direction, it automatically returns to the original protruding position.

  The pressing time setting unit 20 includes a receiving unit 21 to which a start signal generated by the first pressing operation of the operation unit 11 and an end signal generated by the second pressing operation are input, and an internal clock A generator 22 is provided. An internal clock counter unit 23 is provided on the output side of the receiving unit 21 and the clock generating unit 22, and the counter unit 23 starts counting the internal clock by the start signal from the receiving unit 21 and counts by the end signal. finish. An elapsed time calculation unit 24 is provided on the output side of the internal clock counter unit 23, and the elapsed time calculation unit 24 performs the first pushing operation of the operation unit 11 based on the count value from the counter unit 23. To the second pushing operation is calculated.

  The rotation time setting unit 30 includes a step number detection unit 31 that detects the rotation amount of the operation unit 11, that is, the number of rotation steps, and the step number detected by the step number detection unit 31 and the operation unit in advance. A delay time calculation unit 32 is provided that calculates a delay time corresponding to the rotation amount of the operation unit 11 based on the delay time associated with the rotation amount per step.

[2. Operation of the embodiment]
The operation in this embodiment will be described below.
When the delay time of the video signal relative to the audio signal confirmed by the operator is so long as to reach several seconds, the operation unit 11 of the encoder 10 is pressed at the timing when the predetermined audio signal is confirmed. When the operation unit 11 is pressed for the first time, the encoder 10 outputs a start signal to the receiving unit 21 of the push-type time setting unit 20, and the counter unit 23 is supplied from the internal clock generation unit 22 according to the start signal. Start counting the clocks generated.
That is, FIG. 2 is a diagram illustrating the relationship between the operation of the operation unit 11 and the elapsed time calculation in the pressing time setting unit 20. As shown in FIG. 2, when the operation unit 11 is pressed for the first time, a start signal is output from the encoder 10, and the counter unit 23 starts counting the number of clocks by this start signal.

  At this time, since the operation portion 11 is provided with the spring 12 on the outer periphery of the shaft portion, the operation portion 11 returns to the normal state (full stroke) immediately even if the first pressing is performed. It becomes possible to perform the second pressing.

  When the operator presses the operation unit 11 for the second time at the time of confirming the video signal corresponding to the audio signal that has been pressed for the first time of the operation unit 11, an end signal is output from the encoder 10, and the counter 23 The internal clock count ends. Then, the elapsed time calculation unit 24 in the time elapsed detection unit 20 reaches the first to second times of the operation unit 11 from the count clock number and the clock frequency counted from the start to the end counted by the counter unit 23. The elapsed time of the pressing operation is calculated, and this is output as delay time information to the time delay processing unit 40 via the addition unit 40.

  In this way, when the operator hears the start sound of the audio signal output from the speaker or the like, the operation unit 11 is pressed for the first time, and the operator visually recognizes the video signal corresponding to the audio signal. By performing the second pressing of the operation unit 11 at the time, the time interval until the first pressing and the second pressing are performed is calculated as the elapsed time in the pressing type time setting unit 20, and the calculated time is calculated here. The time is output to the time delay processing unit 40.

  On the other hand, after the delay time is input by the pressing operation of the operation unit 11 by the operator as described above, when the input delay time is further finely adjusted in units of several milliseconds, the operation unit 11 moves the shaft portion. Since it is configured to be rotatable at the center, the operation unit 11 is rotated, and a delay time corresponding to the rotation amount is input to finely adjust the delay time set by the pressing operation.

  That is, when the operation unit 11 is rotated, the rotation direction and the rotation amount in either the forward or reverse direction are sent to the step number detection unit 31 of the rotation type time setting unit 30 and detected by the step number detection unit 31. The delay time calculation unit 32 calculates a delay time based on the number of positive or negative steps and a delay time pre-assigned per rotation amount step, and the calculated delay time is a time delay processing unit 40. Is output. In the time delay processing unit 40, the delay time set by the rotary time setting unit 30 is added to or subtracted from the delay time set by the push-type time setting unit 20, whereby the delay time is set. Fine adjustments are made.

  As a result, the time delay processing unit 40 adds both of the delay time information output from the pressing time setting unit 20 and the rotary time setting unit 30 to the actual input sound as a delay time. Output audio.

[3. Effects of the embodiment]
According to the present embodiment, the delay time can be input by a simple operation in which the operator presses the operation unit 11 in accordance with the timing of the deviation between the audio signal and the video signal. It is possible to input the delay time easily and quickly compared to the technique of inputting by changing the rotation speed of the part. In addition, it is possible to put a long time interval between the first and second pressing operations by pressing operation, so even if the delay time is long, the operability does not change, and in units of a few seconds There is an advantage that a long delay time can be dealt with by only two pressing operations.

  Furthermore, in the present embodiment, since the fine adjustment can be performed by rotating the operation unit 11 for a short delay time of several milliseconds, the pressing operation is performed for the long delay time, and the rotation operation is performed for the fine adjustment. By inputting with, it becomes possible to input a more accurate delay time with a simple operation.

  Further, by performing fine adjustments by pressing operation and rotation of the operation unit 11 twice with the knob which is the same operation unit 11, the operation unit 11 which gives a start and end instruction to the counter unit 23 is placed in one place. Thus, it is possible to prevent an operation error such as a pressing error due to a mistake in the operation unit 11.

[4. Other Embodiments]
In addition, this invention is not limited to the above embodiment, The following other embodiment is also included.
(1) Instead of outputting the start signal and the end signal by the pressing operation as described above twice as the operation unit 11, the start signal is output by pressing the operation unit, and the pressing operation is continued as it is. It is also possible to use one that outputs an end signal by canceling.
(2) As the operation unit 11, instead of making the rotary knob itself freely movable as described above, a push type, slide type or rocker type switch is provided in the vicinity of the rotary type knob. A signal that outputs a start signal and an end signal may be used.

The block diagram which shows the whole structure of the delay time input device in one Embodiment of this invention. The figure which shows the relationship between operation | movement of the operation part in the delay time input device of embodiment of FIG. 1, and the elapsed time calculation process in a press type time setting part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Encoder 11 ... Operation part 12 ... Spring 20 ... Press type time setting part 21 ... Reception part 22 ... Clock generation part 23 ... Counter part 24 ... Elapsed time calculation part 30 ... Rotary type time setting part 31 ... Step number detection part 32 ... Delay time calculation unit 40 ... Time delay processing unit

Claims (5)

Using an encoder, the delay time between the audio signal and the video signal ascertained by the operator is input to a time delay processing unit that performs a delay process on the audio signal in order to eliminate the delay of the video signal with respect to the audio signal. In the delay time input device,
An encoder having an operation unit which can be rotated and pressed;
A rotational time setting unit that detects a rotation amount of the operation unit and calculates a delay time associated with the rotation amount of the operation unit based on a predetermined delay time assigned for one rotation amount step;
A receiving unit that inputs a start signal and an end signal output by the pressing operation of the operation unit; an internal clock counter unit that starts and ends counting of an internal clock according to the start signal and the end signal from the receiving unit;
An elapsed time calculation unit that calculates an elapsed time between the start signal and the end signal based on a count value by the internal clock counter unit;
An addition unit that adds the delay time calculated by the rotary time setting unit and the elapsed time calculated by the elapsed time calculation unit and outputs the result to the time delay processing unit. Delay time input device.   The delay time input device according to claim 1, wherein the operation unit transmits a start signal by a first press and transmits an end signal by a second press.   The delay time input device according to claim 1, wherein the operation unit transmits a start signal when pressed, and transmits an end signal by releasing the pressed operation unit continuously.   The said operation part is formed separately in the knob which rotates an encoder, and the button which outputs a start signal and an end signal, The Claim 2 or Claim 3 characterized by the above-mentioned. Delay time input device. Using an encoder, the delay time between the audio signal and the video signal ascertained by the operator is input to a time delay processing unit that performs a delay process on the audio signal in order to eliminate the delay of the video signal with respect to the audio signal. In the delay time input method,
An encoder that allows the operation unit to rotate and be pressed is provided, and a predetermined delay time is assigned to one rotation amount of the operation unit, and a delay time setting start and end is assigned to the pressing operation of the operation unit. The delay time set by the pressing operation of the operation unit and the delay time according to the rotation amount of the operation unit are added, and the added delay time is output to the time delay processing unit. Delay time input method.

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