JP2009171330A - Television camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a television camera with which recording or reproducing operation is easily confirmed without requiring cameraman's viewing. <P>SOLUTION: A CPU 6 acquires an access signal indicating that recording or reproducing operation is in process from a recording medium 5. An audio system DSP and AMP 7 converts the access signal input from the CPU 6 into an access audio signal through program processing, and mixes the converted access audio signal with an audio signal to generate a mixed audio signal. The generated mixed audio signal is amplified by the audio system DSP and AMP 7 and then output as an audio signal for recording or reproducing operation confirmation from a speaker 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention uses an electrically, magnetically, or optically accessible recording medium (for example, a hard disk or a memory) that does not generate sound during recording or reproduction operation, and uses sound when recording and reproducing images. The present invention relates to a television camera whose operation is confirmed.

  Conventionally, broadcasting stations have been reporting news using a television camera equipped with a VTR (Video Tape Recorder). When recording a video signal and an audio signal on the VTR, the cameraman obtains the audio from the speaker of the TV camera and confirms that the VTR is operating by listening to the operating sound of the VTR separately from the audio from the speaker. .

  The operating sound of the VTR is a rotating sound when the video tape travels, and can be confirmed by bringing an ear close to the VTR. Since the cameraman uses the television camera on his / her shoulder, the ears of the cameraman are necessarily close to the VTR. Therefore, it is difficult for people who are far away to understand.

  In recent years, an increasing number of television cameras use recording media that are electrically, magnetically, or optically accessible, such as hard disks and memories (for example, flash memories), instead of videotapes. In the case of a television camera using a recording medium that can be accessed electrically, magnetically, or optically, a complicated mechanism such as a VTR is not required, and the television camera can be downsized as compared with the case of using a VTR. It is becoming mainstream because it can.

A TV camera using a recording medium that can be accessed electrically, magnetically, or optically does not have a complicated mechanism such as a VTR, and therefore, when a recording medium that is accessible electrically, magnetically, or optically is accessed. However, there is no rotating sound like VTR. In a personal computer (PC) or the like, an access state is displayed by blinking a light emitting diode (LED). For example, an access display device that displays a predetermined period only during access to a memory card has been proposed (for example, Patent Documents). 1).
JP-A-5-53922

  In a television camera using a recording medium that can be accessed electrically, magnetically or optically, there is no rotating sound like a VTR, so the cameraman determines whether the recording medium is operating during recording or playback. Is difficult. When displaying that the LED is blinking and displaying that it is operating like a PC, the cameraman needs to visually recognize the LED, which is inconvenient for a cameraman who takes a picture using a TV camera.

  An object of the present invention is to provide a television camera capable of easily confirming a recording or reproducing operation without requiring visual recognition by a cameraman.

The television camera according to claim 1 is:
A television camera using an electrically, magnetically or optically accessible recording medium that does not produce sound during recording or playback operations,
Video signal generating means for receiving an optical signal and generating an electrical video signal from the input optical signal;
A sound signal generating means for inputting a sound and generating an electrical sound signal from the input sound;
The video signal and the audio signal are input, the input video signal and the audio signal are recorded on the recording medium, the video signal and the audio signal recorded on the recording medium are reproduced, and recorded or reproduced. Recording / reproducing means for acquiring an access signal indicating that it is operating from the recording medium;
The access signal and the audio signal are input from the recording / reproducing means, the access signal is converted into an access audio signal, and the converted access audio signal is mixed with the audio signal to create a mixed audio signal. The recording / reproducing operation confirmation sound signal generating means for outputting the mixed sound signal as a recording / reproducing operation confirmation sound signal is provided.

The television camera according to claim 2 is:
The recording or reproduction operation confirmation audio signal creation means,
Audio signal volume varying means for varying the volume of the audio signal;
Access voice signal volume varying means for varying the volume of the access voice signal.

The television camera according to claim 3 is:
The access signal is converted into the access voice signal by a program process.

The television camera according to claim 4 is:
It further comprises lighting means for receiving the access signal and lighting in response to the input of the access signal.

  According to the television camera of claim 1, an access signal indicating that a recording or reproducing operation is being performed is obtained from a recording medium, the access signal is converted into an access audio signal, and the converted access audio signal is mixed with the audio signal. Then, a mixed audio signal is generated, and the generated mixed audio signal is output as an audio signal for recording or reproduction operation confirmation. The recording or playback operation confirmation audio signal enables the cameraman who is taking a picture to confirm the recording or playback operation by voice, so that the TV camera can easily perform the recording or playback operation without requiring the cameraman's visual recognition. Can be confirmed.

  According to the television camera of the second aspect, since the volume of the audio signal and the access audio signal can be adjusted by the audio signal volume changing unit and the access audio signal changing unit, the access audio signal serving as the access sound is too loud. If it is difficult to hear the camera sound, the cameraman can adjust the volume of the sound recorded on the recording medium and the volume of the access sound to set an easy-to-hear volume balance. Further, by adjusting the access audio signal variable means, there is an effect that the sound can be silenced when the access audio signal is unnecessary.

  According to the television camera of the third aspect, it is possible to create an access audio signal according to the photographer's preference using various types of programs, and to obtain an access signal sound suitable for the cameraman.

  According to the television camera of the fourth aspect, since the recording or reproduction operation of the television camera can be visually recognized by the lighting means, the reliability of the television camera system can be improved.

Embodiments of a television camera according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram of an embodiment of a television camera according to the present invention. This television camera is electrically, magnetically, or optically accessible to an image sensor 1, an imaging system digital signal processor (DSP) 2, an audio input unit 3, and an audio system digital signal processor (DSP) 4. Recording medium 5, central processing unit (CPU) 6, audio digital signal processor (DSP) and amplifier (AMP) 7, access light emitting diode (LED) 8, speaker 9, audio variable resistance (VR) 10 And an access sound variable resistor (VR) 11.

  In the present embodiment, the image pickup device 1 and the video system DSP 2 constitute a video signal generation unit, the audio input unit 3 and the audio system DSP 4 constitute an audio signal generation unit, the CPU 6 constitutes a recording / reproduction unit, and the audio system The DSP and AMP 7, the speaker 9, the voice VR10, and the access sound VR11 constitute a recording / playback operation confirmation voice signal creating means, the voice VR10 constitutes a voice signal volume varying means, and the access sound VR11 is an access voice signal volume varying means. The access LED 8 constitutes a lighting means.

  The image sensor 1 is composed of a solid-state image sensor such as a CCD, photoelectrically converts an input optical signal into an electric signal, and inputs the photoelectrically converted electric signal to the video DSP 2. The video DSP 2 performs digital video processing such as contour correction and gamma correction on the input electrical signal, and outputs the digital video processed electrical signal as a video signal to the outside of the camera and to the CPU 6. .

  The audio input unit 3 includes an audio input device such as a microphone, converts the input audio into an electric signal, and inputs the converted electric signal to the audio DSP 4. The audio DSP 4 performs digital audio processing on the input electric signal, and outputs the electric signal subjected to the digital audio processing to the CPU 6 as an audio signal to the outside of the camera.

  The recording medium 5 is composed of a hard disk or a flash memory. When recording, the video signal and audio signal from the CPU 6 are input to the recording medium 5 for recording, and when reproducing, the recording medium 5 inputs the video signal and audio signal to the CPU 6. Further, during the recording or reproducing operation, an access signal that is a signal indicating that the recording or reproducing operation is being performed is output from the recording medium 5.

  The CPU 6 acquires a video signal from the video system DSP 2, acquires an audio signal from the audio system DSP 4, and performs recording and reproduction on the recording medium 5. The CPU 6 inputs the audio signal from the audio DSP 4 to the audio DSP and AMP 7 during recording, and inputs the audio signal from the recording medium 5 to the audio DSP and AMP 7 during reproduction. Further, the CPU 6 outputs an access signal from the recording medium 5 to the audio DSP and AMP 7 and the access LED 8.

  When an access signal is input, the audio DSP and AMP 7 convert the access signal by program processing so that an access sound preset by the photographer is generated, and create an access audio signal that becomes an access sound. The access audio signal is created using a plurality of access sound tables. After converting the access signal, the audio DSP and the AMP 7 mix the audio signal and the access audio signal based on the set values of the audio VR 10 and the access VR 11 and amplify the speaker 9 to sound.

  The access LED 8 is lit only when the recording medium 5 is operating. The speaker 9 is a speaker located in the vicinity of the cameraman's ear when the cameraman photographs the TV camera. The voice VR10 controls the volume of the voice signal. The access sound VR11 controls the volume of the access sound.

The operation of this embodiment will be described.
The photographer sets whether or not the initial setting access sound before shooting is necessary for the television camera, and when the initial setting access sound is necessary, the cameraman initializes the type of the access sound. In this case, a plurality of sounds may be displayed on a view finder (VF) and selected, or a plurality of sounds may be switched by a switch (not shown). When shooting is started after completion of other initial settings, a video signal is output from the video DSP 2 and an audio signal is output from the audio system DSP 2.

  When a recording start switch (not shown) of the television camera is turned on, an access signal is output from the recording medium 5, and the access LED 8 is turned on by the access signal. In the audio system DSP and AMP7, the access signal is created by converting the access signal by a program based on the type of sound set in the initial setting, the access audio signal is mixed with the audio signal, and the mixed access audio signal and audio are mixed. The signal is amplified and output to the speaker 9. When adjusting the volume of the audio signal, the voice VR10 is adjusted. When adjusting the volume of the access sound, the access sound VR11 is adjusted.

  When the access sound is unnecessary, the unnecessary sound is set in the initial setting or the access sound VR11 is narrowed down. If voice input is unnecessary, the voice VR10 is narrowed down.

  Since the access sound is created outside the CPU 6, the access sound is not recorded on the recording medium 5. In addition, since the speaker 9 is located near the cameraman's ear at the time of shooting, the volume of the speaker 9 is low and the sound from the speaker 9 is not input to the audio input unit 3.

The present invention is not limited to the above-described embodiment, and many changes and modifications can be made.
For example, in the above embodiment, the case where sound is output from a speaker has been described, but sound may be output from a headphone terminal.

  Further, although the case where a hard disk or a flash memory is used as the recording medium has been described, other electrically, magnetically or optically accessible recording media that do not generate sound such as rotating sound can be used.

  The present invention has an audio signal monitoring function such as a speaker or a headphone terminal, and an access signal during operation of the recording medium can be obtained from the recording medium without operating sound of the recording medium during recording or reproduction of the recording medium. It can be used with a TV camera that can be mounted with a microphone.

It is a block diagram of an embodiment of a television camera according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Imaging device 2 Imaging system digital signal processor (DSP)
3 Audio input unit 4 Audio system digital signal processor (DSP)
5 Recording media 6 Central processing unit (CPU)
7 Audio system digital signal processor (DSP) and amplifier (AMP)
8 Access Light Emitting Diode (LED)
9 Speaker 10 Voice variable resistance (VR)
11 Access sound variable resistance (VR)

Claims (4)

A television camera using an electrically, magnetically or optically accessible recording medium that does not produce sound during recording or playback operations,
Video signal generating means for receiving an optical signal and generating an electrical video signal from the input optical signal;
A sound signal generating means for inputting a sound and generating an electrical sound signal from the input sound;
The video signal and the audio signal are input, the input video signal and the audio signal are recorded on the recording medium, the video signal and the audio signal recorded on the recording medium are reproduced, and recorded or reproduced. Recording / reproducing means for acquiring an access signal indicating that it is operating from the recording medium;
The access signal and the audio signal are input from the recording / reproducing means, the access signal is converted into an access audio signal, and the converted access audio signal is mixed with the audio signal to create a mixed audio signal. A television camera comprising: a recording or reproduction operation confirmation audio signal generating means for outputting the mixed audio signal as a recording or reproduction operation confirmation audio signal. The recording or reproduction operation confirmation audio signal creation means,
Audio signal volume varying means for varying the volume of the audio signal;
2. The television camera according to claim 1, further comprising an access audio signal volume varying unit that varies the volume of the access audio signal.   3. The television camera according to claim 1, wherein the access signal is converted into the access audio signal by a program process.   The television camera according to claim 1, further comprising a lighting unit that receives the access signal and performs lighting in response to the input of the access signal.

Images