JPH08140200A - Three-dimensional sound image controller - Google Patents

Abstract

PURPOSE: To generate an sound image matched to a stereoscopic picture by detecting distance data of the picture in accordance with the extent of horizontal deviation between right and left pictures to control the acoustic image based on this data at the time of reproducing the stereoscopic picture. CONSTITUTION: The audio signal reproduced by a VDPR(video disk player) 2 is inputted to a delay circuit 8. Reproduced outputs of VDPLs 1 and 2 are taken into a horizontal deviation extent detecting circuit 10. The extent of deviation between both reproduced output pictures is calculated, and this calculated value is transferred to a delay time control circuit 9. The circuit 9 determines the extent of delay based on this calculated value and sends the determined value to the circuit 8. The circuit 8 delays the audio signal of either channel. The audio signal delayed by the circuit 8 is inputted to an amplifier 11 together with the other audio signal which passes without being delayed, and signals amplified by the amplifier 11 are supplied to plural speakers arranged in the vicinity of a screen 6, and sounds are reproduced from speakers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound output device used in a stereoscopic image display device and a perspective control device for a sound image formed.

[0002]

2. Description of the Related Art In the conventional perspective control of a sound image, a head-related transfer function from the sound source to the ear canal entrance is corrected by a filter or the like so as to be equal to a sound source at a short distance (auditory handbook,
(Published by Nakanishi Publishing Co., Ltd.) and a perspective control method for sound images using a speaker array (NHK Giken R & D No. 12 (199).
1) PP. 10-14) are known.

In the control by the speaker array, a large number of speakers are attached concentrically, the sounds of the speakers are reproduced with slightly different delays, and the sound waves reach one point in the sound image space at the same time. Is the focus of the sound wave, and it feels as if sound is coming from that place.

In this case, the position of the sound image is controlled by changing the position and strength of the focal point, but in actual sound image control, the perspective data is recorded manually while watching the reproduced stereoscopic image. It is necessary to perform an authoring work to put it in, and when the stereoscopic video is reproduced, the recorded perspective data is sent to a delay time control device for audio output in synchronization with the time code, and the perspective control of the sound image is performed by this delay time control. Is the current situation.

[0005]

However, the perspective control of the sound image by the speaker array requires perspective data of a stereoscopic image, and at present, the perspective data is manually created while playing back the recorded image. ing.

In this case, there is a problem that a huge amount of perspective data is required to control a sound image matched with a stereoscopic image on a frame-by-frame basis, and the time taken to create this data is considerable.

In view of this, the present invention focuses on the fact that there is a horizontal image shift between a left-eye image and a right-eye image in a stereoscopic image, and detects the horizontal shift amount between the left and right images. This enables real-time acquisition of perspective data and realizes the creation of sound images that match stereoscopic images.

[0008]

DISCLOSURE OF THE INVENTION The present invention is based on a video signal output source for the left and right eyes, an audio signal output source of at least two channels, and a horizontal signal for the left and right video from output signals from the respective video signal output sources. A horizontal shift amount detection circuit for detecting a shift amount, a delay amount control circuit for determining a delay amount based on a detection value of the horizontal shift amount detection circuit, and an output of one channel of the audio signal output source are connected. A delay circuit for delaying the audio signal output of the channel by the delay amount determined by the delay amount control circuit, and an amplifier for amplifying the audio signal output of the delayed channel and the audio signal output of the other channel. And consists of.

[0009]

In the above structure, the video signals for the left and right eyes are synchronized and sent to the display device such as a cathode ray tube or a liquid crystal display, and the screen display in which the images for the left and right eyes are overlapped is performed.

As for audio, the horizontal shift amount is calculated from the video signals for the left and right eyes, and 2-channel voice having a delay difference corresponding to the shift amount is output, and the pop-out position corresponding to the stereoscopic image is output. Form a sound image with a sound source.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the stereophonic image control apparatus of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a basic block circuit diagram of a stereoscopic video system. Reference numerals 1 and 2 are video signals for outputting a video signal by reproducing a video disc on which a video signal for the left eye and a video signal for the right eye are recorded. Video Disc Player (VDP) L, R, 3 as VDs
Controller for synchronously operating PL1 and VDPR2
(Controller: CONT'L) 4 and 5 are VDPL1 and VD
A liquid crystal projector (Projecter: P) that is activated by each output of PR2 and projects an image on the screen 6 from the rear side.
J) L, R, and 7 are lenticular screens provided so that the viewer can view the images for the left and right eyes displayed on the screen 6 without wearing special glasses.

It is assumed that the audio signal is recorded together with the video signal on the one video disk (here, the video disk on which the video signal for the right eye is recorded). VDPR2
The audio signal (having at least two channels) reproduced by is input to the delay circuit 8.

The delay amount of the delay circuit 8 is determined by the delay time control circuit 9, and the calculation of the delay amount of the delay time control circuit is based on the horizontal shift amount of the image by the two image signals.

That is, the reproduced video outputs of the VDPL1 and VDPR2 are taken into the horizontal shift amount detection circuit 10.
Here, the shift amount of the image is calculated for both the reproduced video outputs,
The calculated value is passed to the delay time control circuit 9.

Then, the delay time control circuit 9 determines the delay amount based on the calculated value and sends the determined value to the delay circuit 8. The delay circuit 8 delays the audio signal of any one channel based on the determined value of the transmitted delay amount.

The audio signal delayed by the delay circuit 8 enters the amplifier 11 together with the audio signals of the other channels which have passed through without delay and the amplified signal is arranged in the vicinity of the screen 6. Are supplied to two or more speakers, and the sound is reproduced from these speakers.

In this case, the focus position formed by the delayed audio signal and the undelayed audio signal is located near or far from the screen 6 depending on the amount of delay.
Therefore, the position of the sound image according to the pop-out amount of the image being reproduced can be secured in real time.

In the above embodiment, the VDP is described as an example, but a VTR (Vide Tape R) is used instead of the VDP.
ecorder) and CD-ROM (Compact Disc Read Only Me
It goes without saying that the same effect can be obtained by using mory) as the video signal output source.

[0020]

As described above, according to the present invention, when reproducing a stereoscopic image, the perspective data of the image is detected from the horizontal shift amount of the left and right images, and the sound image is controlled based on this data. The perspective control of the combined sound image becomes possible in real time, and it becomes possible to enjoy a more realistic 3D image.

In addition, it is possible to expect an effect that the authoring work of the perspective data of the sound while reproducing the stereoscopic image, which is conventionally performed, becomes unnecessary.

[Brief description of drawings]

FIG. 1 is a circuit block diagram illustrating an embodiment of a stereoscopic sound image control device of the present invention.

[Explanation of symbols]

 1, 2 Video disc player 3 Synchronous controller 4, 5 Liquid crystal projector 6 Screen 8 Delay circuit 9 Delay time control circuit 10 Horizontal deviation detection circuit 11 Amplifier

Claims (1)

[Claims] 1. A horizontal shift amount for detecting a horizontal shift amount of left and right video from an output signal from each of the left and right video signal output sources, an audio signal output source of at least two channels, and each of the video signal output sources. A detection circuit, and a delay amount control circuit that determines a delay amount based on a detection value of the horizontal shift amount detection circuit,
A delay circuit connected to the output of one channel of the audio signal output source and delaying the audio signal output of the channel by the delay amount determined by the delay amount control circuit, and the audio signal output of the delayed channel And a stereophonic sound image control device comprising an amplifier for amplifying the audio signal output of the other channel.