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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
television apparatus having a decoder for surround sound audio signals and having a speaker
incorporated in the front part.
2. Description of the Related Art In a movie to be shown in a movie theater, a multi-channel
sound reproduction function has already been used for a relatively long time. This feature
provides a good three-dimensional hearing effect, and thus a very real hearing experience. This
feature is called Dolby Pro-Logic Sound System or Surround Sound, and uses four audio channels.
These four channels are encoded into two channels compatible with conventional two channel
stereo. The four audio channels include audio signals for the front left and right speakers, the
center speaker, and channels for the rear and / or side speakers for surround sound.
Surround sound audio signals are often included in recorded VHS video cassettes and often
transmitted via TV programs. These can be played back in a television device with a built-in
decoder. Television systems often use a separate AV receiver that incorporates a Dolby Pro Logic
decoder for audio playback. This audio playback feature uses five speaker boxes. In this case,
according to the manufacturer's recommendation, these speaker boxes are arranged as follows in
the living room. Place one box to the left and right of the front, and the center box below the
television, as is usually the case for stereo equipment. The two boxes for the surround channel
are placed on the left and right of the rear wall, or placed as close as possible to the left and right
side walls. There is also known a television apparatus in which speakers for stereo signals are
arranged on the left and right and speakers for the center channel are arranged in the middle, for
example under a picture tube, which is for surround external speakers behind the surround
channel. It has a terminal.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a television
apparatus having a surround sound reproduction function and easy for the user to handle.
According to the present invention, there is provided a television apparatus having a decoder for
surround sound audio signals and incorporating a speaker on the front side, the left and right
sides of the television apparatus. The problem is solved by configuring a television apparatus
characterized in that a speaker for surround channel reproduction that radiates in the lateral
direction is provided in the side area.
Advantageous additional embodiments of the invention are set forth in the dependent claims.
present invention, speakers for surround sound are used and arranged on both sides of the
television apparatus to perform lateral radiation. These speakers radiate the surround sound
signal, for example, to the television user at an angle of 90 °, which enables three-dimensional
reproduction. Experiments have shown that the position in the room of the surround sound
speaker is not so important for three-dimensional reproduction, for example, it is not necessary
to place the speaker behind the viewer or laterally to the viewer.
An angle of approximately 90 ° has been found to be suitable for the viewer or for the television
device. Also, surround speakers should not radiate directly to the viewer. Therefore, it is possible
to attach one surround speaker to the right and left of the television apparatus. This does not
limit the three-dimensional hearing experience in particular. A particularly advantageous
mounting location is the rear half of the tapered lateral region of the casing.
The invention will now be described in more detail by way of example with reference to the
schematic drawings.
The television apparatus of FIG. 1 is a view from the top left side of the rear side.
Arrow 1 indicates the normal direction of the back surface 2 of this television set. This figure
uses a grid raster and is shown in perspective. Side areas L and R located on the left and right as
viewed from the front side are tapered rearwardly to the end K of the box. In order to radiate the
surround sound channel, the speakers 3 and 4 are respectively incorporated on the left (L) and
right (R) sides at the tapered end. This speaker radiates audio laterally to the viewer at an angle
of about 90 °.
Because the casing is tapered, the viewer can not see the speaker, and as a result, there is no
audio component directly radiated in the direction of the viewer. The other speakers radiating
the audio signal are not shown on the left and right and at the center of the television set. These
speakers are incorporated in the front of the television apparatus in a known manner. The
arrangement of the speakers 3 and 4 in this illustrative example is merely an example. Other
positions of the side portions R and L are likewise possible. In the model shown, it has been
found to be preferable to place them in the rear half of these lateral parts L, R, but attachment to
the box-shaped end K is likewise possible. The speakers 3 and 4 used here are wide bandwidth
speakers, and radiate the sound directly from the casing to a distant place. Wideband speakers
are sufficient because the frequency range of the Dolby Surround sound signal is limited and
does not extend to very low and very high frequencies.
The surround sound decoder of the television apparatus as well as the other electronic
components are the same as in the prior art and are therefore not shown. The invention as
illustrated here can also be used for Dolby Pro Logic systems, Dolby AC-3 or MPEG-2 audio
systems if the television apparatus is equipped with a corresponding decoder.
The present invention eliminates the need for external speakers for three-dimensional sound
reproduction, and as a result, the cost of packaging a surround sound television system is
approximately equal to the cost of packaging a conventional stereo television system. The
television apparatus provided with the external speaker box mentioned at the beginning has a
relatively high packaging cost due to the presence of the external speaker, and the product box
becomes much larger. This cost is significantly reduced by the present invention. It also reduces
shipping and storage costs due to the smaller and lighter dimensions of the carton.
Yet another advantage is that the use of this television device does not require the installation of
additional speakers in the living room. Such additional speakers not only require additional
space, but are often difficult to install, which may damage the atmosphere in the living room or
require complicated wiring. It is natural that speakers arranged in a television device can not
radiate the same high output as an external speaker, but this television device should be
equipped with a terminal for an external surround speaker in the same manner as an existing
television device. It is also possible to attach an external speaker as required later.
Since the installation of the television apparatus is easy, it is possible for the purchaser to be
acceptable and at the same time to attract the purchaser's attention. The present invention allows
the purchaser to install a surround sound television device at home, without the additional
expense and space requirements.
With the digitization of television technology and recording and playback technology, other
surround sound systems such as Dolby AC3 and MPEG-2 have also emerged. Such systems use
digital audio data for 5 channels. The five channels are the front left and right channels, the
center channel, the rear left and right two channels for stereo audio, and the additional channels
for bass speakers. According to the invention, it is also possible to expect good stereo sound in
connection with such or future surround sound audio devices. In the present invention, these
rear channels can also be reproduced by the left and right speakers in the side area.
It is equally possible to place the speakers only on the top side of the television set or with the
speakers for surround channel reproduction placed on the side, but equivalent or better results
are obtained. It was not.
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