KR200319770Y1 - Multi-channel headphone system - Google Patents

Abstract

In order to improve the stereoscopic effect of multichannel headphones such as 5.1, 6.1, and 7.1 channels, the signal input to the front unit of the multichannel headphones is transmitted with a predetermined time delay, and a part of the left unit signals are attenuated and mixed with the right signal, and the right Design of a multichannel headphone system comprising correction means configured to attenuate a portion of a unit signal and mix it with the left signal. The correction means of the present invention includes delay elements or delay circuits 32a and 32b for delaying each signal input to the front units Front and Center among the signals from the sound equipment, and the right unit Right of the signals from the sound equipment. The first signal attenuator / mixer 34a which attenuates a part of each of the input signals FR, RR, and SRC and mixes the signal input to the left unit Left, and the left unit Left of the signals from the sound equipment. And a second signal attenuator / mixer 34b that attenuates a portion of each input signal FL, RL, and SLC and mixes it with the signal input to the right unit Right.

Description

Multi-channel headphone system

The present invention relates to a multi-channel headphone, specifically, in order to improve the stereoscopic effect of multi-channel headphones such as 5.1, 6.1, and 7.1 channels, the signal input to the front unit of the multi-channel headphone is delayed for a predetermined time, and left A multi-channel headphone system is further provided with correction means configured to attenuate a portion of the unit signal and mix it with the right signal, and attenuate a portion of the right unit signal with the left unit signal.

Audio speaker systems have evolved rapidly from the first two channels to multichannels (eg 5.1, 6.1, 7.1, etc.). The two-channel speaker system means that there is one speaker on each side, which is the basic configuration of the traditional stereo. On the other hand, the multi-channel speaker system refers to a system in which the speakers are arranged to surround the listener, such as front left, front right, center, rear left, and rear right, instead of the conventional left and right speakers.

Figures 1a, b, c is a simplified illustration of the 5.1, 6.1, 7.1 channel system of the multi-channel speaker. As shown in Fig. 1A, the 5.1-channel system has a center (C), front left (FL), front right (rear) to reproduce three-dimensionally the audio signal output from an audio device (home theater, DVD player, PC, game machine, etc.). FR), rear left (RL), rear right (RR) speakers and woofer (W). A woofer (also called a subwoofer) is a bass-only regenerator, and since the bass is not directional and is regarded as 0.1 channel, the speaker system as shown in Fig. 1 is called a 5.1 channel system. In FIG. 1B, the 6.1-channel system is a rear center (RC) speaker added to the rear of the listener in a 5.1-channel system, and the 7.1-channel system of FIG. 1C is a surround left center (SLC) and surround right center ( SRC) speaker added.

In order to listen to music or watch a movie through such a multi-channel speaker, it is necessary to connect to an audio device in which an audio signal is reproduced separately for each channel or to use a multi-channel dedicated decoder. Currently, DVD players, PC sound cards, and PlayStation II game consoles support multi-channel sound playback.

On the other hand, the technology to apply the multi-channel to the headphone, not the speaker system has recently emerged. The left and right ear parts of the headphones were arranged in front left and right, rear left and right, center and woofer (used by many vibrators). An example of a multichannel headphone is shown in FIG. FIG. 2 illustrates only the left portion 20a of the multi-channel headphone currently commercialized, and includes a front left unit FL, a rear left unit RL, a center unit C, and a vibration unit Vib. have. The center unit C and the vibration unit Vib act as channels with the same right and left. The woofer signal in the speaker system is usually used to generate vibration by vibrator (Vib) in the headphone.

In the case of the multi-channel headphone, since the sound reproducing units are all located near the ears, the sound resolution of each unit may be slightly lower than that of the speaker system. In addition, compared to the speaker system installed in a large space there is a disadvantage that the presence is somewhat reduced. The reason for this is as follows.

In general, in a multichannel speaker system, the front and center speakers are located farther away from the listener than the rear speakers. Because of this, the sound played back in the front speaker reaches the listener's ear late compared to the sound played back in the rear speaker. In order to compensate for this, many audio apparatuses output the channel signal entering the rear speaker in advance rather than the channel signal entering the front and center speakers. In other words, the front and rear speakers delay the phase difference of the rear channel so that sound of the same phase can be reproduced at the same time. On the other hand, in the multi-channel headphones, the distance between the front unit and the rear unit is almost the same. Therefore, when the conventional multi-channel headphones are directly used for the sound system for general speaker system, the front unit receives the sound signal whose phase difference is corrected in advance. There is a problem that the channel signal of is input much later than the channel signal of the rear unit. In other words, from the speaker system point of view, the front and rear channels are correctly phase-corrected, but the use of headphones for this sound equipment causes the phase difference between the front and rear units.

In addition, in a typical speaker system, the left and right speakers are separated, but the listener can actually hear the right speaker with the left ear but not the left speaker with the left ear and the right speaker with the left ear. I can hear it small. In this way, the listener can feel the direction and distance of the sound and can hear it more realistically. However, in headphones, only the left channel can be heard by the left ear and the right channel by the right ear, so the stereoscopic presence as in a normal speaker system is hard to feel.

In addition, the ear opposite the sounding direction is heard slightly later than the ear facing the sounding direction.

Applicants have invented the present invention as part of an effort to get as close to the speaker system as possible, although the acoustic depth in the headphones may not be superior to that of a normal speaker system.

An object of the present invention is to transmit a signal input to the front unit of a multi-channel headphone with a predetermined time delay, to attenuate a part of the left unit signal to mix it with the right signal, and to attenuate a part of the right unit signal with the left unit signal. It is to provide a multi-channel headphone system, a correction means composed of a circuit is included in the amplifier.

1A-C are conceptual diagrams of a multichannel speaker system.

2 is a block diagram of a typical multi-channel headphone.

3 is a wiring diagram showing an outline of the present invention;

Figure 4 is a wiring diagram showing an embodiment of the present invention.

5 is a wiring diagram showing another embodiment of the present invention.

<Description of Drawing>

Multi-channel headphone 20, first delay elements 32a, 32b, signal attenuation / mixers 34, 34 ', first delay elements 42a, 42b, 42c, signal attenuation / mixers 44a, 44a', 44b, 44b ', 44c, 44c'), second delay element 46

Description of Examples

3 is a conceptual diagram of a headphone system according to the present invention. The signal output from the sound device on the left is assumed to be a signal optimized for a general speaker system. The multi-channel headphone 20 used in the present invention receives a signal by a plug inserted into the output jack of the correction means 30, which is further included in the sound device. Correction means 30 further included in the amplifier of the multi-channel headphone system according to the present invention further includes the following elements.

That is, the correction means 30 includes the first delay elements 32a and 32b for delaying the signal input to the headphone front units FR, FL, and C among the signals coming from the sound equipment, and the right unit Right. A first signal attenuator / mixer 34 that attenuates a portion of the signal input to the left unit and mixes it with the left unit signal, and attenuates a portion of the signal input to the left unit left to the right unit signal. It further comprises a second signal attenuator / mixer 34 'to mix.

In this way, the signal input to the front unit Front is delayed by the delay element of the correction means 30, and the signal input to the rear unit Rear (signal corrected by delaying the phase at the sound equipment side) is received from the sound equipment. Since it is directly transmitted, the headphone 20 is ultimately inputted with a sound signal of the same phase input to the front unit and the rear unit.

In addition, since a part of the left unit signal is attenuated in the correction means 30 to be reproduced in the right unit, and a part of the right unit signal is attenuated and reproduced in the left unit. The same effect can be achieved with multichannel headphones as with a channel speaker system.

FIG. 4 illustrates the case of 7.1-channel headphones as an embodiment in which the concept of FIG. 3 is embodied. In the 7.1-channel headphone 20 ', as described above, the front right unit (FR), front left unit (FL), center unit (C), rear right unit (RR), rear left unit (RL), and surround right The center unit SRC, the surround left center unit SLC, and the vibration unit Vib are installed.

As shown in Fig. 4, the signals input to the front units FR, FL, C are delayed by the respective first delay elements 42a, 42b, 42c in the correction means 40 and input to each unit. Here, the delay element is a common technique in the technical field to which the present invention belongs, and may be configured by combining individual elements or may use a semiconductor bridging device (BBD).

4, the right units FR, RR and SRC and the units FL, RL and SLC located on the left are respectively attenuated / mixers 44a, 44a ', 44b, 44b', 44c and 44c '. Input a mixed portion of the attenuated signal to the other unit. Here, the attenuator may be manufactured by combining components such as a resistor and a capacitor. Signal attenuator and mixer (mixer) is also a technique for the main pipe in the technical field to which the present invention belongs.

Meanwhile, in addition to the embodiments of FIGS. 3 and 4, the second delay element 46 may also be included in each of the signal attenuation / mixers 44a, 44a ', 44b, 44b', 44c and 44c 'as shown in FIG. Can be. The reason is that the sound arrival time between the front units (FR, FL, C) and the rear units (RR, RL) is finer, but the ear opposite the sounding direction is slightly slower than the ear toward the sounding direction. It is to correct this because it arrives and hears. Thus, as shown in Fig. 5, by inserting a second delay element 46 into each signal attenuation / mixer, the left signal is attenuated and delayed by a certain amount and transmitted to the right unit, and the right signal is attenuated and fixed by a certain amount of time. Delayed and delivered to the left unit, sound reproduction is possible to a degree similar to a perfect speaker system. Here, the delay time of the second delay element 46 will be smaller than the delay time of the first delay element 42, and the absolute amount thereof should be set by a person skilled in the art in actual cases.

The above embodiments are merely examples of the technical idea of the present invention in detail, and are not examples that limit the technical scope of the present invention. This is because the scope of the present invention is determined by the appended claims.

According to the present invention, there is an effect of making the stereoscopic sense of reality and the realism of a general multichannel speaker system even with headphones without a separate operation in a simple configuration.

Claims (3)

A system comprising a multi-channel audio device for outputting a sound signal optimized for a multi-channel speaker system, and a multi-channel headphone 20 including a front unit and a rear unit for receiving and playing a signal output from the audio device, First delay elements 32a and 32b for delaying each signal input from the sound device to the front unit, and a part of the signals input to the right unit among the signals from the sound device are attenuated to a signal input to the left unit. The first signal attenuator / mixer 34 to mix and the second signal attenuator / mixer 34 'to attenuate a portion of each signal input to the left unit of the signals coming from the sound equipment and to mix the signal input to the right unit. Correcting means 30 and a, Multi-channel headphone system comprising a front unit for reproducing each signal output from the correction means (30) and the left and right units. The apparatus of claim 1, wherein the front unit of the multi-channel headphone 20 includes FR, FL, and C units, the right unit includes FR, RR, and SRC, and the left unit includes FL, RL, and SLC. Multi-channel headphone system, characterized in that. The method according to claim 1 or 2, wherein the first and second signal attenuation / mixers 34, 34 ', And a second delay element 46 for delaying each signal input to the first and second signal attenuation / mixers 34 and 34 'by a predetermined time and inputting it to the left or right unit. system.