JPH0295100A - Sound field variable device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a sound field variable device that can freely change a reproduced sound field to match a video scene (frame). .

BACKGROUND OF THE INVENTION In recent years, the development of sound field reproducing devices has become important, and sound field variable devices that can simulate the sound field of a ball, etc. have been developed.

FIG. 4 is a hardware block diagram showing the configuration of a conventional sound field reproduction device. In FIG. 4, 1 is a signal input means for inputting a digital signal; 9 is a signal processing means for processing the input signal so that it has target sound field characteristics;
IO is a processing instruction means for instructing a processing procedure for signal processing by the signal processing means; 7 is a system control means for changing the instruction content of the processing instruction means and controlling the signal switching means; 8 is for outputting a digital signal. It is a signal output means.

The operation of the conventional sound field variable device configured as described above will be explained. In FIG. 4, digital signals manually inputted from the signal output means are subjected to signal processing in the signal processing means 9 according to the processing procedure of the processing instruction means 10. Next, the output from the signal processing means 2 is the signal output means 8.
The signal is output from the external digital-to-analog converter and converted into an analog signal, and by connecting it to an amplifier, speaker, etc., it can be reproduced with the desired sound field characteristics. If you want to change the sound field to be reproduced, after transmitting the processing procedure from the system control means 7 to the processing instruction means,
The reproduction sound field can be changed by performing the same processing as described above.

Problems that the invention sought to solve However, with the above configuration, the video scene (
Frame) If you try to change the sound field data continuously, the entire processing procedure must be transferred from the system control means to the processing instruction means, which takes time, so the sound field changes at quick intervals. The problem was that it was not possible.

The present invention was made in view of the above-mentioned problems, and it smoothly changes the sound field quickly, and improves the movement of the sound field, the sense of distance, and the like.
The present invention provides a sound field variable device that continuously synchronizes the spread, movement of a sound image, etc. with video and realizes it in real time.

Means for Solving the Problem In order to achieve this object, the sound field variable device of the present invention includes first and second processing instruction means for storing processing procedures necessary for realizing continuous sound field changes. Then, when switching the sound field, select the processing procedure selection code on the same medium on which the video signal is recorded, corresponding to each video scene (frame), or on a separate medium synchronized with the frame. Field control code C (hereinafter referred to as "Code J on the medium")
The system is comprised of a system control means for transmitting data from a plurality of signal processing means, first and second signal processing means for processing signals according to a processing procedure, and a signal switching means for smoothly switching outputs from the plurality of signal processing means.

Effect: With this configuration, continuous or many machining procedures can be stored in advance in the first and second machining instruction means,
When switching the playback sound field according to the video scene (frame), the system control means sends a code for selecting a processing procedure to realize the playback sound field from the code on the medium to one of the processing instruction means, and the signal processing means After the output is stabilized by signal processing according to the processing procedure selected in
The signal switching means gradually reduces the amplitude of the first and second signal processing means and adds the increased amplitude while switching the output, allowing continuous playback in real time without noise during switching. You can change the sound field.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a hardware block diagram of a sound field variable device in one embodiment of the present invention. In FIG. 1, 1 is a signal input means for inputting a digital signal, 2 is a first signal processing means for processing the signal by delaying and feeding back the input digital signal according to a predetermined procedure, and 4 is a first signal processing means. 3 is a first processing instruction means for instructing the signal processing means to process the main signal; 5 is a second processing instruction means; 6 is a first signal processing means; Processing means 2
and a signal switching means 7 for switching the output signal of the second signal processing means 4. The signal switching means 7 reads the code for processing procedure selection from the code on the medium and transmits the signal to the first and second processing instruction means 3.5. A system control means controls the switching means 6, and a signal output means 8 outputs a digital signal.

9 is a means for reading the control code from the code on the medium.

The operation of the sound field variable device configured as described above will be described below. In Figure 1, in normal operation,
The signal from the signal input means 1 is processed by the signal processing means 2 according to the processing procedure selected by the first processing instruction means 3, and the signal is processed by the signal switch 7 to the first signal processing means 2.
The selected signal is output from the signal output means 8. At this time, the processing instruction means 5 of the second signal processing means 4 has selected the same processing procedure as the processing instruction means 3 of the signal processing means 2. Among the signals output from the first signal processing means 2 and the second signal processing means 4, the signal from the first signal processing means 2 is selected by the signal switching means 7 and output from the signal output means 8.

Next, a description will be given of the time when sound field data is switched.

If a hall is displayed on the screen and the position of the listening point changes continuously, as if the main character were listening to music while changing seats in the hall, it would be better to just change the volume of the sound. (This requires a continuous processing procedure that also includes delay time and feedback information.

FIG. 2 shows a memory map of the processing instruction means.

Further, FIG. 3 shows a diagram showing the listening position of a certain hall. As shown in FIG. 2, processing procedures for realizing listening characteristics corresponding to listening positions 1 to 56 in FIG. 3 are stored for each area on the memory. When switching the sound field data, the system control means 7 transmits to the second processing instruction means 5 a code for selecting an address in which a processing procedure for realizing a sound field at the moved listening position is stored. For example, if you move from A to B in Figure 3, from memory map 4 to 11, 18, 2 in Figure 2.
Select the processing procedure in order from No. 5. First, processing procedure No. 11 is selected, and when the output from the second signal processing means 4 becomes stable, a switching signal is output from the system control means 7 to the signal switching means 6 for the control signal read from the code on the medium. do.

The signal switching means 6 gradually decreases the signal from the first signal processing means 2, gradually increases the signal from the second signal processing means 4, and outputs the sum of both signals.

After a certain period of time, the output from the signal switching means 6 is switched to the signal from the second signal processing means 4.

Next, select machining procedure No. 18 of the first machining instruction means 3 from the system control means 8 again, repeat the above operations alternately, and finally change machining procedure No. 25 to the second machining instruction. It is sufficient to set it to means 5.

In this embodiment, the speed at which the machining procedure of the first machining instruction means and the machining procedure of the second machining instruction means 5 are switched can be arbitrarily changed.

As described above, according to this embodiment, a plurality of signal processing means and a plurality of processing instruction means are used, and the processing instructions are stored in advance in order to perform continuous sound field control.
By only sending the processing procedure selection code from the system control means 7, the sound field can be changed in real time and continuously without generating noise during data switching.

Furthermore, in this embodiment, continuous changes in the listening position have been described, but if the processing instructions for changes such as movement of a sound image and change in sense of distance are stored in the processing instruction means, continuous changes in the listening position can be made in real time. It is possible to perform field variations.

Effects of the Invention As described above, the present invention uses two signal processing means and two processing instruction means, and stores a processing procedure for continuous sound field control in the processing instruction means in advance. At the time of data switching, the system control means 7 reads the control signal from the code on the medium and only sends the code for selecting the processing procedure, so that it can reproduce continuously changing sound fields or rapidly changing sound fields. Playback can be performed in real time without generating noise.

[Brief explanation of drawings]

Fig. 1 is a block diagram of hardware in an embodiment of the present invention, Fig. 2 is an explanatory diagram showing a memory map of the processing instruction means of the invention, Fig. 3 is an explanatory diagram showing the listening position of the hall, Fig. 4 1 is a block diagram of hardware of a conventional sound field variable device. DESCRIPTION OF SYMBOLS 1...Input means, 2...First signal processing means, 3...First processing instruction means, 4...
... second signal processing means, 5 ... second processing instruction means, 6 ... signal switching means, 7 ...
. . . system control means, 8 . . . signal output means, 9 . . . control signal reading means. Name of agent Patent attorney Shigetaka Awano

Claims (3)

[Claims] (1) A signal input means for inputting an audio signal converted into a digital signal, a plurality of signal processing means for processing the signal by delaying and feeding back the input digital signal according to a determined procedure, and the signal processing means processing instruction means for instructing a signal processing procedure for a signal; signal switching means for smoothly switching a plurality of output signals from the plurality of signal processing means when switching the processing procedure; A sound field variable device comprising: a system control means for controlling a signal switching means; and a signal output means for outputting a digital signal output from the signal switching means. (2) Preliminarily storing a large number of processing procedures for sound field control in the processing instruction means, and switching the processing procedure used for signal processing by sending only a code for selecting the processing instruction means from the system control means. A claim characterized by (
1) The sound field variable device described above. (3) The system control means reads and processes the sound field control code written on the same medium on which the video signal is recorded, corresponding to each video scene, or on another medium synchronized with the frame. The sound field variable device according to claim 1, wherein the sound field is transmitted to an instruction means.