JPH03169200A - Television receiver - Google Patents

Abstract

PURPOSE: To generate 'surrounding sound effect' in a living room, without dispersedly arranging speakers, etc., by building speakers suitable to transmission over the entire sound range, additionally and equally in both side walls of a television receiver. CONSTITUTION: A casing 1 is provided with a picture screen 2, and speaker arrays 3 and 4 are provided on both sides of the picture screen. Both side walls of a television receiver are provided with complete planes for speakers which are provided behind a sound-wave transmissive protection wall. The speakers 6 and 8 without having any protective walls are provided in ordinary arrangement and, additional speakers 9 to 11 are provided on the sides of the device in order to radiate a sound wave to the walls in a living room. The speakers can be varied in size. Consequently, 'surrounding sound effect' for stereophonic sensation similar to a concert hall can be generated without dispersedly arranging the speakers, etc., in the living room.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a stereo audio reproduction device, for example a television receiver with HDTV format, new standards for image and audio reproduction, the front of which has two panels on both sides of the image plane. This invention relates to a television receiver in which a speaker is arranged.

BACKGROUND OF THE INVENTION Since the image area has already been enlarged as it approaches home movies, at least a two-way stereo system is required for audio reproduction.

The use of two speakers in a regular stereo paced arrangement to create a simulated sound source in the living space, as well as the use of multiple stereo rings surrounding the television viewer, is a solution to the problem of stereo reproduction. I can't. This is because stereoscopic perspective only occurs in the simulation plane between the speakers. Even if the speaker is slightly shifted from the center, there is a tendency to hear the sound from the speaker immediately next to it.

Problems to be Solved by the Invention An object of the present invention is to provide a television receiver that generates a "surround sound effect" for a three-dimensional sensation similar to a concert hall without separately disposing speakers or the like in a living space. That's true.

SUMMARY OF THE INVENTION The above object is achieved according to the invention in that the television receiver is additionally fitted with loudspeakers on both sides, which are also suitable for transmitting the entire audio range.

Traditionally, speakers of small dimensions were built into narrow vertical surfaces on either side of the television picture plane, or speakers in small casings were rotatably supported in links outside the side walls of the television receiver.

This speaker is removable so that it can be placed in a stereo-based living space.The present invention eliminates such devices that are inadequate for stereoscopic hearing, and in effect: It is characterized in that speakers suitable for transmitting all audio frequencies are similarly installed on both side walls of the television receiver. The arrangement of the loudspeakers allows them to radiate against the walls of the living space, providing conditions for important effects of stereophonic hearing, in particular for widening the listening zone.

Another feature of the invention is to provide an electrical travel time delay device in the side loudspeakers to form a relatively slow first side sound wave or side sound wave reflections, corresponding to the reverberation results of a large concert hall. It is to establish.

Four or more playback channels can be provided for this purpose. This is the same as what is being considered for future HDTV home reception. This is because a corresponding number of loudspeakers can be integrated into the side walls of the device.

Both dynamic and capacitive systems can be used on the side walls of television receivers. According to another feature of the invention, a speaker is also integrated into the upper casing wall of the television receiver.

This speaker is directed toward the ceiling of the living space. This has the advantage that the sound wave radiation against the ceiling of the living space produces an enhanced sound wave distribution, similar to that of a concert hall.
A TV-type device can be configured to have stereo sound reproduction variably, depending on the III-image sequence. Here, the depiction of people in the image is played back with a narrow listening zone for relatively high clarity and realism, and the listening zone is played back when a magnified image scene is to simulate a sense of depth. Expanded. For example, in the case of a singer or an actor, the intelligibility improvement is effected without stereoscopic reflections, whereas for an enlarged acoustic scene in a large space or outdoors a sequence of direct signals, reflections and reverberations occurs.

It would therefore be advantageous if the loudspeaker reproduction of a television set could be adapted wirelessly and remotely, depending on the image course in direction, distance and spatial depth depiction.

For this purpose, a separate electrical and/or acoustic control element can be provided for each loudspeaker group, which controls the level and/or the frequency response and/or the running time. In this case, as is known, ultrasound, infrared radiation, etc. can be used. Furthermore, it is possible to subjectively adjust the optimal spatial reverberation by taking into account differences in the reflection characteristics of room walls.

Additionally, auditory resonance can be used on an analog or digital basis to create an optimal sense of space corresponding to head-related stereophony. This acoustic resonance can already be generated during microphone recording using a head or ear microphone, or it can be realized digitally, for example, in a television set.

Example The details of the present invention will be explained below based on the drawings.

FIG. 1 shows a television receiver according to the invention.

In the casing l there is already shown an image-receiving surface 2 and, on either side of the image surface, loudspeaker rows 3 and 4, as is customary in television receivers. The side walls of the television receiver are provided with a complete plane according to the invention for the loudspeakers, which are arranged behind a sound-transparent protective wall.

In FIG. 2 the loudspeakers 6, 7, 8 are shown in their normal arrangement without a protective wall. In the configuration of the present invention, the additional speakers 0, 10, 11 are provided on the side of the device in order to emit sound waves toward the wall of the living space facing the speakers.

The size of the loudspeaker can be of different sizes. Also, as shown in Figure 3, the dimensions 12 are as large as possible.
, 13, one of which can operate with a transit time delay and the other without a transit time delay. The speaker can also be equipped with an acoustic transit time delay element on the back side to create unidirectionality. Rather than having multiple loudspeakers on the side wall of the television receiver covering the entire audio frequency range, it is also possible to have only one loudspeaker configured for the entire audio frequency range on the side wall. FIG. 4 shows the basic configuration of a television receiver. The conical section 14 of the casing for low frequencies is
It can be used as an acoustic wall for speakers. This is because low frequencies of 200 Hz or less are generated in the room, for example, when playing music.

FIG. 5 shows how sound propagates in a living space when a television receiver is placed in front of the center of the wall of the living space. The arrows only represent the direction of sound propagation and do not take into account complex frequency-dependent details.

The front loudspeakers act only on narrow sound propagation paths l7, l8, which alone cannot generate a corresponding listening zone size for music or the like.

The lateral loudspeakers, on the other hand, emit a series of reverberations with sound propagation paths 19, 20, lateral sound waves, the first reflected wave and advantageously a transit time delay, as well as analog or digital auditory resonances as an ideal sense of space. . Auditory resonance can already be demonstrated during recording using a head or ear microphone or digitally in a television receiver.

4. As shown in FIG. 6, even if the television receiver is placed in a corner of the living space, the same effect can be achieved in the present invention.
22 in the living space by a speaker placed on the side. The front speaker has sound propagation paths 23 and 24, and its operation is similar to that described in FIG. 5.

Effects of the Invention According to the present invention, it is possible to obtain a television receiver that generates a "surround sound effect" for a three-dimensional sensation similar to a concert hall without distributing speakers or the like in a living space.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of the television receiver of the present invention with details omitted, and Fig. 2 is a schematic diagram of the television receiver of the present invention with the speaker installed and the protective grid removed.
Figure 3 is a schematic diagram of the television receiver with two large speakers on the side wall, Figure 4 is a schematic diagram of the television receiver, and Figure 5 is a diagram of the television receiver according to the present invention. FIG. 6 is a diagram showing the sound wave propagation of a small front speaker and a side front speaker when placed in the center of a wall of a living space, and FIG. 6 is a diagram showing a sound wave path when placed at a corner of a living space.

Claims (3)

[Claims] 1. In a television receiver in which speakers are arranged on both sides of the image plane in front of it, there are additional speakers (9
, 10, 11, 12, 13). 2. Side speakers (9, 10, 11, 1
2. A television receiver as claimed in claim 1, characterized in that 2, 13) is provided with an electrical transit time delay device corresponding to the reverberation results of a large concert hall. 3. Claim 1: The upper casing wall of the television receiver also incorporates a speaker directed toward the ceiling of the living space.
Or the television receiver described in 2.