JP2009104680A - Sound recording level setting device, program, sound recording device, and sound recording level setting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent automatic sound recording level setting from being adversely affected by sound related to device operation, in a sound recording device. <P>SOLUTION: The sound recording level setting device setting a sound recording level includes:operating means (step 51, 61) for receiving instruction operation to start and finish setting of the sound recording level, a detecting means (step 57) for detecting that a voice signal too large to be recorded by a temporary setting value is input when the sound recording level is set, reducing means (step 57-60) reducing the temporary setting value of the sound recording level by a predetermined level every time the excessive input is detected by the detecting means, and setting means (step 62-65) setting temporary value of the sound recording level a predetermined period before finish instruction operation is received by the operating means, as the setting value of the sound recording level. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a recording level setting device that sets a recording level based on a trial, a program that causes a computer to function as each means in the device, a recording device that uses the device, and a recording level setting method in the device.

  Conventionally, many techniques for automatically setting a recording level in a recording apparatus have been proposed. For example, automatic recording control (AGC) that lowers the recording level for a certain period of time when there is an excessive input during actual recording, and then gradually increases the recording level, or recording prior to actual recording. Once the level is set to the maximum, when there is an excessive input, the recording level is lowered by a predetermined amount, and this process is repeated until there is no excessive input (sound distortion due to excessive recording level). An automatic recording level setting for setting is known.

  According to the automatic gain control, there is an advantage that a constant recording level can always be maintained. However, when recording music or the like, it is not possible to record faithfully to the strength of the performance such as pianissimo or fortissimo. For this reason, in situations where live performances are recorded, automatic recording level setting in which a recording level is set in advance before recording is often employed. It is preferable to set an automatic recording level before actually starting recording so that the recording level does not change during recording.

  FIG. 10 shows an example of a live recording procedure using such automatic recording level setting. First, in step 101, automatic recording level setting is started by the user operating the recorder. Next, in step 102, the live performance is rehearsed. At this time, the performance of the fortissimo part is performed. During this time, the recording level is set appropriately by the recorder.

  Next, in step 103, the user sets the automatic recording level by operating the recorder, and in step 104, the user starts actual recording by operating the recorder. Start of production. The recording level set during the rehearsal in step 102 is not changed until the live performance is finished and the recording is stopped. When the live performance is finished, in step 106, the user operates the recorder to stop recording. This ends the live recording.

  As a technique related to recording, a technique for preventing recording of an operation sound of a switch operated by a user at the start of recording has been proposed (for example, see Patent Document 1). In this proposal, in order to prevent the operation sound of the switch for recording start and end from being recorded by the recording device, the recording is performed through the buffer, and the sound at the time of pressing and releasing the switch in the buffer is also recorded. The signal part is not recorded.

Japanese Patent Laid-Open No. 10-091197

  However, according to the conventional automatic recording level setting technique described above, an automatic recording level setting function is provided in a recorder 112 having a built-in microphone 111 for recording a conference or live performance as shown in FIG. In the case where it is provided, the sound related to the operation of the operation key 113 operated at the start and stop of the automatic recording level setting is affected, and it may not be possible to set an appropriate recording level. In other words, the recording level should be set based on the sound 114 that is the purpose of recording, but actually, the operation sound 115 or the like is picked up by the microphone 111, and the recording level is originally set in the recording level setting. There is a problem that the sound that should not be referred to prevents the setting of an appropriate recording level.

  FIG. 12 is a time chart showing this problem. T on the horizontal axis is time, and t1 to t10 indicate timing of each operation of the user. A period T1 from t1 to t5 is a user operation period for starting automatic recording level setting. During this period, t1 is when the set of the recorder 112 is lifted, t2 is when the operation key 113 for starting the automatic recording level setting with the operation key 113 is pressed, and t3 is automatically recorded by the recorder 112 in response to this press. When the recording level setting process is started, t4 is a time when the pressing of the operation key 113 is released, and t5 is a time when the set of the recorder 112 is placed in the original place.

  A period T3 from t6 to t10 is a user operation period for ending the automatic recording level setting. During this period, t6 is the time when the set of the recorder 112 is lifted, t7 is the time when the operation key 113 for ending the automatic recording level setting is pressed, and t8 is the automatic recording level setting process in response to this pressing. , T9 is the time when the pressing of the operation key 113 is released, and t10 is the time when the set of the recorder 112 is placed in the original place. A period T2 from t3 to t8 is a period during which the recording level setting process is actually performed. That is, the period from t2 to t3 and the period from t7 to t8 are delay periods from when the operation key 113 is pressed until the recording level setting process actually starts or ends.

  In the period T2 during which the recording level setting process is actually performed, a sound when the operation key 113 is released at t4, a sound when the recorder 112 is placed at t5, a sound when the set of the recorder 112 is lifted at t6, and Since the sound when the operation key 113 is pressed at t7 is picked up by the microphone 111 as the sound of “click”, “backlash”, “kotto”, etc., these sounds affect the automatic recording level setting and are set appropriately. May interfere.

  An object of the present invention is to prevent adverse effects of sound related to the operation of the recording apparatus on automatic recording level setting in the recording apparatus in view of the problems of the conventional technology.

  A recording level setting device according to a first aspect of the present invention is a recording level setting device for setting a recording level, an operating means for accepting an instruction operation for starting and ending recording level setting, and for recording the recording level, Detection means for detecting the input of an audio signal that is excessive for recording using the temporary setting value of the level, and the temporary setting value of the recording level each time an excessive input is detected by the detection means. It is characterized by comprising reduction means for reducing the quantity, and setting means for setting the recording level temporarily as a recording level setting value before a predetermined retroactive period of acceptance of the end instruction operation by the operating means.

  Here, for example, a band rehearsal corresponds to the demonstration. For example, the provisional setting value corresponds to a recording level whose initial value is the maximum. As an excessive input, if recording is performed with a temporary setting value of the recording level at the time of the input, the level is too high, and the level of the signal to be recorded exceeds a predetermined value, causing an input that causes distortion. Applicable. As the predetermined amount reduced by the reducing means, for example, a fixed amount such as [1 dB] or an amount corresponding to the degree of excess in the excessive input is applicable. For example, 2 [seconds] corresponds to the predetermined retroactive time.

  In this configuration, when the operation means accepts a recording level setting start instruction operation, recording level setting is started. When setting the recording level, the detecting means detects that an audio signal that is excessive for recording using the temporarily set value of the recording level is input based on the demonstration. The reduction means reduces the provisional set value of the recording level by a predetermined amount each time an excessive input is detected by the detection means. As a result, the temporarily set value of the recording level becomes a preferable value for recording. However, the setting means sets the temporary setting value of the recording level before the predetermined retroactive period of accepting the end instruction operation by the operating means as the recording level setting value. Therefore, the operation sound of the device such as “click”, “backlash”, “kotto”, etc. that may occur after the retroactive period or the sound at the time of the trial stop does not adversely affect the setting of the recording level.

  According to a second aspect of the present invention, there is provided a recording level setting device according to the first aspect, wherein a counter means that counts up every time a predetermined time elapses and resets every time the retroactive period elapses, and every time the predetermined time elapses. Storage means for storing a temporarily set value of the recording level at that time in a storage area corresponding to the count value by the counter means at that time.

  According to a third aspect of the present invention, there is provided a recording level setting device according to the first aspect, wherein the recording level is set at each time when the excessive input is detected by the timer means for measuring the elapsed time and the detection means. Storage means for storing a temporarily set value of the recording level together with a timer value by the timer means at that time.

  The recording level setting device according to a fourth aspect of the present invention is the recording level setting device according to the first aspect, wherein each time the excessive input is detected by the detecting means, the temporary setting value of the recording level at that time is measured, and the elapsed time from that time is measured. Storage means for storing the information in association with the timer.

  According to a fifth aspect of the present invention, there is provided a recording level setting apparatus according to the fourth aspect, further comprising means for stopping the time counting of the timer whose timer value exceeds the retroactive period.

  According to a sixth aspect of the present invention, there is provided a recording level setting apparatus according to any one of the first to fifth aspects, wherein the reduction of the temporary setting value of the recording level by the reduction means is performed after the start instruction operation by the operation means has been accepted. It is characterized by having a means to start after elapse of time.

  A program according to a seventh invention causes a computer to function as each means in the device according to any one of the first to sixth inventions.

  A recording apparatus according to an eighth invention is a recording means for recording based on an input audio signal, and a recording according to any one of the first to sixth inventions for setting a recording level for recording by the recording means. And a level setting device.

  A recording level setting method according to a ninth aspect of the present invention is a recording level setting method in a recording level setting device for setting a recording level, an operation accepting step for accepting an instruction operation for starting and ending recording level setting, and the recording When setting the level, a detection step for detecting the input of an audio signal that is excessive for recording using the provisional setting value of the recording level, and a recording level each time an excessive input is detected by the detection step. A reduction step of reducing the temporary setting value of the recording level by a predetermined amount, and a setting step of setting the temporary setting value of the recording level before the predetermined retroactive period of accepting the end instruction operation by the operation step as a setting value of the recording level. Features.

  According to the present invention, since the temporary setting value of the recording level before the predetermined retroactive period of accepting the end instruction operation by the operating means is set as the setting value of the recording level, “click”, “backlash”, “kotto”, etc. It is possible to prevent the operation sound related to the end instruction operation or the sound generated at the end of the trial from adversely affecting the recording level setting.

  FIG. 1 is a block diagram showing a configuration of a recording apparatus having an automatic recording level setting function according to an embodiment of the present invention. As shown in the figure, this apparatus displays various information under the control of the processing unit 11 that performs various processes such as control of each part of the apparatus and recording processing, the storage unit 12 accessed by the processing unit 11, and the control of the processing unit 11. From the display unit 13 to be performed, the operation unit 14 for the user to perform operation input to the processing unit 11, the audio input unit 15 that converts the sound to be recorded into an audio signal and supplies the audio signal to the processing unit 11, and the processing unit 11 Is provided with an audio output unit 16 for outputting the audio signal.

  The storage unit 12 is configured using a hard disk, a flash memory, a magnetic tape drive, an optical disk drive, or the like. The storage unit 12 stores recorded voice data. As the data format, for example, MP3, WMA, WAV or the like can be used. The voice input unit 15 includes a microphone that converts voice into a voice signal. The processing unit 11 accepts user instructions regarding automatic recording level setting start and end, recording start and end, and the like according to a predetermined program by a user interface function of the operation unit 14 and the display unit 13 and operates according to the instructions. I do. When the automatic recording level is set, the recording level is set based on the audio signal from the audio input unit 15. When recording, the audio signal from the audio input unit 15 is subjected to predetermined conversion and supplied to the storage unit 12. The storage unit 12 records the supplied audio signal on a recording medium.

  FIG. 2 is a flowchart showing automatic recording level setting processing by the processing unit 11. In this process, the audio signal input for a predetermined time immediately after the instruction operation for starting the automatic recording level setting is performed, for example 2 seconds, and for a predetermined time immediately before the instruction operation for ending is performed, for example 2 seconds. The automatic recording level setting is not taken into consideration. However, the period from when the user performs the start instruction operation for automatic recording level setting to when the end instruction operation is performed is the sum of the predetermined times immediately after the start instruction operation and immediately before the end instruction operation, for example, 4 seconds or more. It shall be.

  In this process, first, in step 21, the process waits for an instruction operation to start automatic recording level setting. When the instruction operation is performed, the process proceeds to step 22 where a start timer for counting the time until the automatic recording level setting is started is set. The time set in the start timer is, for example, 2 seconds, and the actual recording level setting operation is not performed during this period. Next, in step 23, it waits for the set time of the start timer to elapse.

  When the set time has elapsed, in step 24, the recording level setting is started. That is, the recording level setting process of FIG. 3 described later is started as a separate task. During this recording level setting period, a trial for setting the recording level is performed, and based on this trial, the recording level is set in the process of FIG. The recording level is set by updating the recording level setting value every time a predetermined excessive input is detected during the setting period.

  Next, in step 25, the counter c as a subscript of the memory array m (c) for storing the recording level is reset. The counter c is counted up every time the recording level is stored in the memory array m (c) (step 29) (step 30), and reset every time it exceeds 9 (step 31). That is, an array having 10 array elements is used as an array for storing recording levels.

  Next, in step 26, a storage timer is set for determining the timing for sequentially storing the recording levels in the memory array m (c). The time set in the storage timer is 0.2 seconds, for example, and every time this period elapses (step 28), the recording level is stored (step 29).

  Next, while repeating steps 27 and 28, it waits for the set time of the storage timer to elapse. However, if it is detected in step 27 that there has been an instruction operation for ending automatic recording level setting during this time, the process branches to step 32. When it is detected in step 28 that the set time of the storage timer has elapsed, the process proceeds to step 29, where the set value of the recording level at that time is stored in the memory array m (c). This set value is a set value of the recording level currently set in the process of FIG. 3 being executed as another task.

  Next, in step 30, the counter c is incremented, and in step 31, it is determined whether or not the value of the counter c exceeds 9. If it is determined that 9 is not exceeded, the process returns to step 26, and if it is determined that 9 is exceeded, the process returns to step 25.

  When branching to step 32, the recording level setting process of FIG. 3 being executed as another task is terminated. In step 33, the recording level setting value of about 2 seconds before is obtained based on the recording level setting value at each time point stored in the memory array m (c). Adopt as a set value. That is, the recording level setting value for 2 seconds before the time when the user performs the automatic recording level setting stop operation is invalidated. Thereafter, the process of FIG. 2 is terminated. Thereafter, the actual performance is recorded according to the recording level setting value finally adopted.

  FIG. 3 is a flowchart showing a recording level setting process performed in response to the start request in step 24 described above. In this process, when a recording level setting start request is received in step 35, the process proceeds to step 36 to set the recording level to the maximum. Next, until receiving an end request for recording level setting, every time an excessive input exceeding a predetermined level occurs, a predetermined amount, for example, a fixed amount such as 1 [dB], or an amount corresponding to an excess amount with respect to the predetermined level, Decrease the recording level setting. An excessive input means an input that is recorded as a signal exceeding a predetermined level if recording is performed with the set value of the recording level at the time of input.

  That is, in step 37, it is determined whether or not there is an excessive input. If it is determined that there is no excessive input, the process directly proceeds to step 39. If it is determined that there is an excessive input, the recording level setting value is set in step 38. After the predetermined amount is lowered, the process proceeds to step 39. In step 39, it is determined whether or not there is a request to end recording level setting. If it is determined that there is no request, the process returns to step 37. If it is determined that there is a request, recording level setting is ended.

  FIG. 4 shows the state of the memory array m (c) when the value of the counter c is counted up to 7 in the processing of FIG. At this time, m (6) is the latest data, and m (7) is the data about 2 seconds before. Thus, in step 33 in the process of FIG. 2, the value of the memory array m (c) corresponding to the value of the counter c at that time is the set value of the recording level about 2 seconds ago. This may be adopted as the final recording level setting value.

  According to the present embodiment, the audio signal input for a certain time after receiving the start instruction for the automatic recording level setting and for a certain time before receiving the stop instruction is excluded from consideration in the automatic recording level setting. In a recording scene or the like using a microphone built in the apparatus main body, it is possible to prevent noise related to an instruction operation for starting and ending automatic recording level setting from adversely affecting the recording level setting.

  FIG. 5 is a flowchart showing another example of the automatic recording level setting process. In this example, in order to exclude the audio signal input at a predetermined time before the instruction operation to end automatic recording level setting is performed, the recording level is set according to the occurrence of excessive input. When the value is decreased, the set value of the recording level before the decrease and the time information at that time are stored. There is no particular limitation on the capacity for storage. However, also in this case, the period from when the user performs the start instruction operation on the automatic recording level setting to when the user performs the end instruction operation is excluded from the recording level setting after the start instruction operation and before the end instruction operation. It shall be more than the sum of each predetermined time. In addition, it is assumed that an excessive input is detected at least once and processing for lowering the recording level is executed.

  In this process, first, in step 51, it waits for an instruction operation to start automatic recording level setting. When the instruction operation is performed, the process proceeds to step 52 where a start timer for counting the time until the automatic recording level setting operation is started is set. The time set in the start timer is, for example, 2 seconds, and the actual recording level setting operation is not performed during this period. Next, in step 53, it waits for the set time of the start timer to elapse.

  When the set time of the start timer elapses, in step 54, the counter c as a subscript of the memory array m (c, n) (n = 0 or 1) for storing the recording level is reset. The recording level is stored in m (c, 0), and the timer value of the storage timer for specifying the storage time is stored in m (c, 1) (step 58). The counter c is counted up every time this m (c, n) is stored (step 59).

  Next, in step 55, the storage timer is restarted. For example, the timer value is counted by starting from 0 and counting up every 0.1 seconds. Next, at step 56, the recording level is set to the maximum. This set value becomes the initial set value of the recording level.

  Next, the recording level storing process is performed while repeating steps 57 to 61. At that time, the recording level is stored and changed in steps 58 to 60 every time an excessive input is detected (step 57) until an instruction operation to end the automatic recording level setting is detected (step 61).

  That is, first, in step 57, it is determined whether or not there is an excessive input. If it is determined that there is an excessive input, the process proceeds to step 58. If it is determined that there is no excessive input, the process proceeds to step 61. An excessive input means an input that is recorded as a signal exceeding a predetermined level if recording is performed with the set value of the recording level at the time of input.

  In step 58, the recording level at that time is stored in m (c, 0), and the timer value of the storage timer at that time is stored in m (c, 1). Next, at step 59, the counter c is incremented. Further, in step 60, the recording level is lowered by a predetermined amount, and then the process proceeds to step 61. As the predetermined amount, for example, a fixed amount such as 1 [dB] or an amount corresponding to an excessive amount of excessive input with respect to a predetermined level is applicable.

  In step 61, it is determined whether or not there has been an instruction operation by the user to end the automatic recording level setting. If it is determined that the instruction operation has not been performed, the process returns to step 57 to continue the recording level storing process. If it is determined that the instruction operation has been performed, the recording level storing process is terminated, and the process proceeds to step 62.

  In step 62, the current timer value t of the storage timer is stored. Next, the latest recording level is acquired at least 2 seconds before the timer value t, and this is adopted as the official setting value of the recording level. That is, until it is determined in step 64 that t−m (c, 1) is 2 or more, the counter c is decremented in step 63 and it is determined that t−m (c, 1) is 2 or more. In step 65, the value of m (c, 0) at that time is adopted as the formal setting value of the recording level. Thereby, the automatic recording level setting process ends.

  FIG. 6 shows the contents sequentially stored in the memory array m (c, n) in step 58 described above. When an excessive input is detected for the first time in step 57, the maximum recording level (step 56) is recorded as the set value of the recording level in m (0, 0), and the timer of the storage timer at that time is recorded in m (0, 1). The value is stored (step 58). When an excessive input is detected for the second time, a level obtained by subtracting a predetermined level from the maximum recording level is stored in m (1, 0) as a set value of the recording level, and the storage timer at that time is stored in m (1, 1). The timer value is stored (step 58). In this way, every time an excessive input is detected, the recording level setting value and the timer value at that time are stored.

  Therefore, based on the memory array m (c, n), the latest recording level setting value is obtained at least 2 seconds before the point when the automatic recording level setting end instruction is issued by the processing of steps 62 to 65. Can do. Then, by setting the acquired setting value as the official recording level setting value, the recording level setting value at each time point when an excessive input is detected for 2 seconds before the instruction to end the automatic recording level setting is invalidated. It is possible to prevent the sound of lifting the recording device generated during the second or the operation sound of the recording device from adversely affecting the recording level setting.

  There are other possible methods for adopting the recording level setting value as a true setting value when the automatic recording level setting end instruction is given for a predetermined time. In the example of FIG. 5, in order to specify the storage time of the set value of each recording level, one timer that measures each storage time on the basis of the restart time of step 55 is used. A relative timer that individually measures each elapsed time from when the set value is stored (when each excessive input is detected) may be used. All the relative timers are counted up every fixed time, for example, every 0.1 second.

  FIG. 7 shows the storage contents of the memory array m (c, n) when the recording level setting value is stored using such a relative timer. c is a subscript of the array m that is counted up whenever there is an excessive input, and m (c, 0) is a set value of the recording level when each excessive input is detected as in the embodiment of FIG. Is stored in m (c, 1), the timer value of the relative timer indicating the elapsed time from the storage time of each corresponding set value. Thereafter, the timer value is counted up every time a fixed time, for example, 0.1 seconds elapses. Specifically, as shown in FIG. 7, the maximum recording level is stored in m (0,0), and a timer value indicating the elapsed time from the time when the excessive input is first detected is stored in m (0,1). Is memorized. m (1, 0) stores a level obtained by subtracting a predetermined level from the maximum recording level, and m (1, 1) stores a timer value indicating an elapsed time from the time when the excessive input is detected for the second time. Is memorized.

  Thus, every time an excessive input is detected, the set value of the recording level at that time is stored in m (c, 0), and the corresponding relative timer m (c, 1) is reset and counted. Will start. Therefore, when an instruction to end automatic recording level setting is given, the recording level at a time point that is a predetermined time after that point can be acquired based on the memory array m (c, n).

  FIG. 8 shows an application example of the recording level setting value storage method shown in FIG. FIG. 8 shows the contents of the memory array m (c, n) at a certain point in time. As shown in the figure, in this example as well as in the case of FIG. 7, every time an excessive input is detected, the set value of the recording level is stored in m (c, 0), and the relative timer m (c, 1) is stored. Starts timing and the counter c (subscript c) is incremented. However, in this example, in order to reduce the processing load, only the relative timer m (i, 1) (i <c) whose index i is smaller than the value of the counter c and the timer value is 2 seconds or less is used. The count-up target is set so that a timer whose timer value exceeds 2 seconds is not counted up.

  For example, the relative timers m (0, 1) to m (2, 1) in the figure have stopped counting up in 2.1 seconds because the timer value has exceeded 2 seconds. Since m (3, 1) to m (6, 1) does not exceed 2 seconds, the count-up is continuing. Since the value of index i (= 7) is equal to or greater than the value of counter c (= 7), m (7, 1) is not counted up yet, and its contents remain undefined. The contents of m (7, 0) are also undefined. According to this example, the relative timer m (c, 1) that does not need to be counted up is not counted up, so the load is reduced accordingly.

  FIG. 9 is a flowchart showing an example of automatic recording level setting processing corresponding to the storage method of FIG. 7 or FIG. This processing uses a relative timer m (c, 1) that individually measures the elapsed time from the recording time of each recording level as a timer for specifying the recording time of each recording level setting value. Different from the case of 5. The rest is the same as in FIG.

  That is, first, in step 91, an instruction operation for starting automatic recording level setting is waited. When the instruction operation is detected, the routine proceeds to step 92 where a start timer for counting the time until the automatic recording level setting is started, for example, 2 seconds, is set. Next, in step 93, it waits for the set time of the start timer to elapse. When the set time has elapsed, in step 94, the counter c which is a subscript of the memory array m (c, n) for storing the set value of the recording level is reset. In step 95, the recording level is set to the maximum.

  Next, a recording level storing process is performed while repeating steps 96 to 100. In this process, the recording level setting value is stored and changed each time an excessive input is detected (step 96) until an instruction operation to stop automatic recording level setting is detected (step 100). 99).

  That is, first, in step 96, it is determined whether or not there is an excessive input. If it is determined that there is an excessive input, the process proceeds to step 97. If it is determined that there is no excessive input, the process proceeds to step 90.

  In step 97, the set value of the recording level at that time is stored in m (c, 0), and the relative timer m (c, 1) is reset. Thereafter, the relative timer m (c, 1) is counted up, for example, every 0.1 second. Next, at step 98, the counter c is incremented. Further, in step 99, the recording level is lowered by a predetermined amount, for example, 1 [dB], and then the process proceeds to step 100.

  In step 100, it is determined whether or not there has been an instruction operation by the user to stop the automatic recording level setting. If it is determined that the instruction operation has not been performed, the process returns to step 96 to continue the recording level storing process. If it is determined that the instruction operation has been performed, the recording process of the recording level is terminated, and the process proceeds to step 101.

  When the processing proceeds to step 101, the latest recording level setting value two seconds or more ago is acquired and adopted as the official recording level setting value (steps 101 to 103). That is, the decrement of the counter c in step 101 is repeated until it is determined in step 102 that the timer value of the relative timer m (c, 1) is 2 seconds or more. Then, the value of m (c, 0) when it is determined that the timer value of m (c, 1) has exceeded 2 seconds for the first time is adopted as the formal setting value of the recording level in step 103. Thereby, the automatic recording level setting process ends.

  Note that the present invention is not limited to the above-described embodiment, and can be implemented with appropriate modifications. For example, in the above description, the predetermined time after the start instruction operation of the automatic recording level setting and before the end instruction operation is excluded from the target period of the automatic recording level setting. Only one of the later predetermined time or the predetermined time before the end instruction operation may be excluded from the target period for automatic recording level setting. The length of the predetermined time may be set by the user. In the embodiment of FIG. 2, the number of elements of the array m (c) is set to 10, and the recording level setting value is stored every 0.2 seconds. There is no limit.

It is a block diagram which shows the structure of the recording device provided with the automatic recording level setting function which concerns on one Embodiment of this invention. It is a flowchart which shows the automatic recording level setting process by the process part of the apparatus of FIG. It is a flowchart which shows the recording level setting process in the process of FIG. It is a figure which shows an example of the state of the memory array m (c) in the process of FIG. It is a flowchart which shows another example of an automatic recording level setting process. It is a figure which shows an example of the memory content of the memory array m (c, n) in the process of FIG. It is a figure which shows an example of the memory content of the memory arrangement | sequence m (c, n) in the case of performing the process similar to the memory | storage of the recording level setting value in the process of FIG. 5 using a relative timer. It is a figure which shows the example of application of the memory | storage method of the recording level setting value shown using FIG. It is a flowchart which shows an example of the automatic recording level setting process corresponding to the storage method of FIG. 7 or FIG. It is a flowchart which shows an example of the procedure of the live recording using automatic recording level setting. It is a figure which shows a mode that recording of a live performance etc. is performed with the conventional recorder with a built-in microphone. It is a time chart which shows the problem by the recording using the conventional recording device of FIG.

Explanation of symbols

  11: processing unit, 12: storage unit, 13: display unit, 14: operation unit, 15: audio input unit, 16: audio output unit, 111: built-in microphone, 112: recorder, 113: operation key, 114: recording Target sound, 115: extra operation sound.

Claims (9)

A recording level setting device for setting a recording level,
An operation means for accepting an instruction to start and end recording level setting;
In the setting of the recording level, detection means for detecting that an audio signal that is excessive to record using a temporary setting value of the recording level is input;
Reducing means for reducing the provisional set value of the recording level by a predetermined amount each time an excessive input is detected by the detecting means;
A recording level setting device comprising: setting means for setting a temporary recording level setting value before a predetermined retroactive period of accepting an end instruction operation by the operating means as a recording level setting value. A counter means that counts up every time a predetermined time elapses and resets every time the retroactive period elapses;
And a storage means for storing a temporary setting value of a recording level at that time in a storage area corresponding to a count value by the counter means at that time each time the predetermined time elapses. The recording level setting device according to 1. In setting the recording level, timer means for measuring elapsed time;
And a storage means for storing a temporary setting value of the recording level at that time together with a timer value by the timer means at each time point when the excessive input is detected by the detecting means. The recording level setting device according to 1.   Each time the excessive input is detected by the detection means, a storage means for storing a temporary setting value of a recording level at that time in association with a timer for measuring an elapsed time from that time is provided. The recording level setting device according to claim 1.   5. The recording level setting device according to claim 4, further comprising means for stopping the time counting of the timers whose timer value exceeds the retroactive period.   6. The apparatus according to claim 1, further comprising means for starting the reduction of the temporarily set value of the recording level by the reducing means after a predetermined time has elapsed after accepting the start instruction operation by the operating means. The recording level setting device according to claim 1.   A program for causing a computer to function as each means in the apparatus according to claim 1. A recording means for recording based on an input audio signal;
7. A recording apparatus comprising: the recording level setting apparatus according to claim 1 for setting a recording level for recording by the recording means. A recording level setting method in a recording level setting device for setting a recording level,
An operation accepting process for accepting an instruction to start and end recording level setting;
In the setting of the recording level, a detection step of detecting an input of an audio signal that is excessive to record using a temporary setting value of the recording level;
A reduction step of reducing a predetermined set amount of the recording level by a predetermined amount each time an excessive input is detected by the detection step;
A recording level setting method comprising: a setting step of setting a temporary setting value of a recording level before a predetermined retroactive period of accepting an end instruction operation in the operation step as a setting value of the recording level.

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