JPH0262171A - Sound field control code input device - Google Patents

Abstract

PURPOSE:To make a reproduced sound field correspond to a video by recording a sound field control code in synchronization with the video according to the focal distance of a zoom lens. CONSTITUTION:A sound signal absorbed by a microphone 1 at the time of photographing is converted into a signal recordable on a video tape 6 by a voice recording means 2, and recorded as the signal in synchronization with the video. On the other hand, the focal distance of the zoom lens is detected by a focal distance detecting means 3 at the same time as the voice recording, sound field data conforming to the same distance are selected by a control means 4, and the control code is written on the monaural signal track of the video tape by a sound field control code recording means 5. Since the recorded sound field control code is synchronized with the video signal in the same way as the sound signal, the reproduced sound field can be made to correspond to the video.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sound field control code input device for making it possible to reproduce recorded sound in a sound field that matches the video at the time of recording.

2. Description of the Related Art In recent years, realistic sound field reproduction has become more important, and sound field variable devices that can simulate the sound field of a hall or the like have been developed.

FIG. 4 is a block diagram showing a conventional video camera audio recording method.

In FIG. 4, 1 is a microphone for collecting sound, 2 is an audio recording means for recording the collected sound on a video tape, and 6 is a video tape.

The operation of the conventional audio recording method of the video camera configured as described above will be explained. In FIG. 4, a signal picked up by a microphone is recorded on a stereo signal track of a videotape by a recording means. Typically, microphones are unidirectional, and are designed to pick up sound centered on the direction of the subject of the video camera, allowing you to hear the sound in sync with the video.

Problems to be Solved by the Invention However, with the above configuration, the audio is played back in the same state even if the focal length of the video camera is changed, so even if the video is zoomed, the audio signal is Since audio was recorded, there was a problem in that the video and audio did not match when played back.

The present invention has been made in view of the above problems, and provides a sound field control code input device for recording a sound field control code for reproduction in a sound field that matches a video signal. .

Means for Solving the Problems To achieve this object, the sound field control code input device of the present invention includes a focal length detection means for detecting the focal length of a zoom lens, and a monaural signal track of a videotape in accordance with the focal length. The sound field control code recording means includes a control means for sending a control signal to a sound field control code recording means for recording a sound field control code.

This configuration detects the focal length of the zoom lens,
By synchronizing the sound field control code with the captured video and recording it on videotape according to the distance, it is possible to control the sound field by reading the sound field control code recorded during playback and outputting it to the sound field variable device. be.

Embodiment Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a sound field control code input device in one embodiment of the present invention. In FIG. 1, 1 is a microphone for collecting sound, 2 is an audio recording means for recording the collected audio signal on a video tape 6, 3 is a focal length detection means for detecting the focal length of a zoom lens, and 4 is a detection means. This control means controls the sound field control code recording means 5 according to the focal length determined.

The operation of the sound field control code input device configured as described above will be described below. In FIG. 1, an audio signal collected by a microphone 1 during photographing is converted by an audio recording means 2 into a signal that can be recorded on a videotape 6, and is recorded as a signal synchronized with the video.

Meanwhile, at the same time as recording the audio, the focal length of the zoom lens is detected by the focal length detection means 3, sound field data according to the focal length is selected by the control means 4, and sound field control is performed by the sound field control code recording means 5. Write the code to the mono signal track of the videotape. The recorded sound field control code is synchronized with the video signal as well as the audio signal.

FIG. 3 shows a signal recording pattern diagram of a videotape. In FIG. 3, 8 is a monaural signal track, 9 is a stereo signal track, and 10 is a video track. The sound field control track is written on the monaural signal track shown in FIG. The method of determining the sound field control code in the control means 4 is to record a sound field control code that can reproduce a sound field at a short distance when the focal length is short, and to record a sound field control code that can reproduce a sound field at a short distance when the focal length is long. A sound field control code that can reproduce the field was recorded. Note that when a videotape recorded in this manner is played back, the sound field control code is read at the same time and sent together with the audio signal to the sound field variable device, thereby reproducing the sound field at the time of recording.

As described above, according to this embodiment, the focal length of the zoom lens is detected by the focal length detection means, and a sound field control code that can reproduce a sound field according to the focal length is written on the video tape in synchronization with the video signal. By recording the video, it is possible to play back the audio in a sound field that matches the video.

FIG. 2 is a block diagram showing a second embodiment of the present invention. In FIG. 2, reference numeral 7 denotes a sound field control code input means for manually inputting a sound field control code by the photographer, and the same components as in the first embodiment are given the same numbers.

The sound field control code input device configured as above will be described with reference to the drawings.

The method of recording the audio signal from the microphone 1 onto the videotape 6 is the same as in the first embodiment.

Next, during shooting, the photographer selects and inputs a code for creating a sound field suitable for the video using the input means.

Hereinafter, the method of recording the sound field control code on the videotape is the same as in the first embodiment.

As described above, according to this embodiment, a sound field control code that matches the video or a sound field control code that can reproduce an arbitrary sound field is input to the video tape in synchronization with the video signal by the sound field control code input means. By recording the sound field and reading the sound field control code during playback and transmitting it to the sound field variable device, it is possible to play back the sound in a sound field that matches the video.

In this example, only the audio signal picked up by one microphone was explained. However, even when multiple microphones such as a stereo microphone are used, the sound field control code for each channel can be written to the monaural signal track. A similar effect can be obtained by recording.

Effects of the Invention As described above, the present invention detects the focal length of a zoom lens during video recording, and records a sound field control code corresponding to a video scene on a monaural signal track of a videotape using a sound field control code recording means. This makes it possible to freely change the playback sound field to match the video scene.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a sound field control code input device in a first embodiment of the present invention, FIG. 2 is a block diagram of a sound field control code input device in a second embodiment of the present invention, and FIG. FIG. 4 is a signal recording pattern diagram of a video tape, and FIG. 4 is a block diagram showing an audio recording method of a conventional video camera. 3... Focal length detection means, 4... Control means, 5... Sound field control code recording means, 6...
. . . Sound field control code input means, 8 . . . Monaural signal track. Agent's name Patent attorney Shigetaka Awano Haka 1 Famous Confectionery Figure 3 Monaural Signal Track Stereo No. 1i! No. truck diagram No. 4 Microphone

Claims (3)

[Claims] (1) A sound field control code input device comprising a sound field control code recording means for recording a sound field control code on a monaural signal and a track of an audio portion of a video tape in synchronization with a video signal. (2) The sound field control data recording method of the sound field control code recording means includes a focal length detection means for detecting the focal length of the lens of the video camera, and a control means for controlling the sound field control code recording means according to the focal length. 2. The sound field control code input device according to claim 1, wherein the sound field control code input device is provided to automatically record the sound field control code. (3) As a sound field control data recording method of the sound field control code recording means, an input means for manually inputting the sound field control code is provided, and an arbitrary sound field control code is recorded. ) Sound field control code input device.