KR0153897B1 - Multi-channel control apparatus of multi-channel audio reproduction system - Google Patents

Abstract

The present invention allows the user to directly adjust each delay time and gain adjustment value for the multi-channel in the multi-channel data reproduction processing apparatus of the compact disc proposed in Patent Application No. 94-10466, and each channel in matrix form. In order to provide a multi-channel control device of a multi-channel audio reproduction system that allows a user to listen selectively and to maximize the realism that the user feels by improving the path from the data conversion means to the amplifier so as to control the switching. will be.

To this end, the present invention separates and records data obtained from a plurality of data sources into N channels, converts and compresses the music signal of each channel to digital by MPEG algorithm, and assigns a unique channel number to each channel. A key input unit 40 for selecting a channel to be listened to during playback of the compact disc having the number recorded in the channel number of the subheader, and inputting a delay time and a gain adjustment value for the selected channel; A microcomputer 42 for controlling the processing operation of the multi-channel data on the compact disc based on the gain adjustment value, and a switching for switching output of the data of the selected channel analog-converted by the data conversion means 28 under the control of the microcomputer 42; Processing delay operation for the data of the analog-converted selected channel applied through the switching means 44 and the switching switching means 44 Delay adjusting means for performing (46) and, is configured as a gain adjustment means (48) for applying to the amplifier means 32 adjusts the gain of the data of the selected channel delayed by the delay adjustment means (46).

Description

Multichannel Control System of Multichannel Audio Playback System

FIG. 1 is a diagram for explaining the configuration of a sector, which is a logical minimum data recording unit defined by a general CD-ROM / XA and Green Book standard.

2 is a block diagram for explaining a problem of a conventional multi-channel data reproduction processing apparatus of a compact disc.

3 is a circuit diagram of a multichannel control apparatus of a multichannel audio reproduction system according to the present invention.

* Explanation of symbols for main parts of the drawings

20: disc playback device 22: CD-ROM sector decoding / multiplexing unit

24: data buffer 26: MPEG audio coder

28: data conversion section 30: gain adjustment section

32: amplifier 34: sound output device

36: control unit 40: key input unit

42: microcomputer 44: switching switching means

46: delay adjustment means 48: gain adjustment means

The present invention relates to a multi-channel control apparatus of a multi-channel audio reproduction system. In particular, in the multi-channel data reproduction processing apparatus of a compact disc proposed in Patent Application No. 94-10466, the multi-channel which improves the path from the data conversion means to the amplifier A multichannel control apparatus for a channel audio reproduction system.

At present, for example, a compact disc, which is noted as a large-capacity information storage medium, is classified into a plurality of tracks from the inside to the outside on the information recording surface of the compact disc so that any reproduction processing can be performed on the data recorded on the information recording surface. The track is also classified into a plurality of sectors so that data is recorded in a sector unit which is a minimum information recording unit. Each sector has a header and a subheader, respectively, and includes sector address information, file number, channel number, and the like. As is well known for compact discs on which data is recorded in such sector units, optical data is read out, thereby enabling processing of high-quality audio signals.

By the way, considering the case where music data played by a large orchestra using various kinds of musical instruments is recorded on a compact disc that provides the audio signal of high quality, the compact disc is handled and recorded on the information recording surface. In order to provide the best playback capability for the overall audio quality, the disc player for playing music data, for example, has an equalizer designed to adjust the treble and bass of the music audio signal played from the compact disc. However, the adjustment of the audio signal by the equalizer only allows the reinforcement of the high and low reinforcement, but it is not possible to perform separate adjustment for each instrument in the compact disc where the performance music by the orchestra is programmed.

In order to solve this problem, the present applicant, for example, the music audio signal by the orchestra, the data of a plurality of information sources, for example, by assigning channels for each instrument, for example, each sector is recorded by dividing each sector by channel to the plurality of sectors during playback The patent application filed on May 13, 1994, discloses a method for multi-channel recording of recorded data to enable batch playback, and a configuration for reproducing multi-channel data of a compact disc on which predetermined data is recorded. No. 10466 (name: multichannel data recording method of a compact disc and a playback processing apparatus of the disc).

As shown in FIG. 2, the patent application 94-10466 separates and records data obtained from a plurality of data sources into N channels, and converts and compresses the music signal of each channel to digital by MPEG algorithm. CD-ROM sector decoding / switching output means 22 for sequentially assigning each channel a unique channel number and reading out a compact disc having the channel number recorded in the channel number of the subheader for each channel in sequence; Data buffering means (24) for linearity compensation and timing matching of the multi-channel data switched by the CD-ROM sector decoding / switching output means (22); MPEG audio encoding means (26) for decoding the multichannel data compressed by the MPEG algorithm provided from the data buffering means (24); Data conversion means (28) for analog-converting data for each data source restored by the MPEG audio encoding means (26); Gain control means (30) for controlling the gain of the multi-channel data applied from said data conversion means (28) for each channel; Amplification means (32) for amplifying the channel data controlled by the gain control means (30) to be output through the sound output means (34); And control means 36 for controlling the multi-channelization process for the data of the compact disc. The compact disc is characterized in that data from the plurality of data sources is recorded in sector units including a channel number.

Subsequently, a sector configuration which is a logical data recording form of a compact disc according to the above-mentioned patent application 94-10466 will be described. As shown in FIG. 1, one sector of the compact disc has a synchronization signal (Sync) and a header. (Header), Sub-Header, User Data (User Data), Error Detection Code (EDC), Error Correction Code (ECC), and especially subheader file number, channel number, sub mode, coding The information will be recorded.

For example, when recording a music program, data obtained from a plurality of data sources (instruments) is separated into N channels, and the music signal of each channel is digitally converted and compressed by MPEG algorithm, and then a channel unique to each channel is recorded. Multichannel data is recorded on the compact disc by assigning a number and recording the channel number in the channel number of the subheader.

In addition, when data is recorded for each channel for each sector divided in the information recording surface of the compact disc as described above, time adjustment of the MPEG standard included in the sector data is preferably performed to compensate for deviations in the read time of each sector data. Timing synchronization of each sector data is matched based on the code of the system clock reference (SCR), the decode time stamp (DTS), and the presentation time stamps (PTS).

On the other hand, the multi-channelization program is recorded in correspondence with a data source (for example, when a performance sound obtained from a plurality of musical instruments constituting an orchestra is recorded as sector data) in the sector data area compressed in the MPEG method described in FIG. Referring to the operation of the reproduction processing apparatus proposed in the aforementioned Patent Application No. 94-10466 for multi-channel reproduction of the audio signal read out from the compact disc, the control section 36 is provided with an external compact disc reproduction instruction. Accordingly, when drive control of the disc reproducing apparatus 20 is performed to reproduce and output data recorded for each sector from the compact disc having the data format shown in FIG. 1, the sector data (performation data for each instrument) is stored in the CD-ROM. In the sector decoding / multiplexing section 22, sector data is sequentially multiplied based on the channel number code included in each sector data. Duplexing and multi-channelization by the output, the multi-channeled, sector-by-sector data is buffered by data buffer 24 that corresponds to the compensation of a timing matching and linearity for each sector data. Subsequently, multi-channelized data for each sector is applied to the MPEG audio decoder 26 corresponding to the control of the control unit 36, and restoration processing is performed by the MPEG restoration algorithm. Such restoration processing is assigned to each channel. Parallax compensation is also performed to enable parallel output of the restored sector data on the basis of the received timing code. Subsequently, the audio data for each instrument restored by each sector is applied to the data conversion unit 28 at the rear stage and converted into an analog signal, and the analog signal for each sector is controlled by the user's desired instrument under the control of the control unit 36. On the basis of the gain adjustment signal, the gain adjustment unit 30 amplifies a predetermined level in the corresponding amplifier 32 in a state where the gain is adjusted for each instrument, and then outputs it through the corresponding sound output device 34 (speaker).

However, according to the aforementioned patent application No. 94-10466, when recording a music program on a compact disc, audio signals for various kinds of musical instruments are recorded in sector units of the same track in sector units, respectively. Although the realism is further improved by multi-channel processing of the audio signal for each sector obtained at the time of playing the disc, for example, the realism due to the positional difference between the instrument located at the center and the instrument located at the side of any musical instrument constituting the orchestra. Not only can not be delivered vividly, but if you want to hear only the sound of a specific instrument is not possible to adjust the operation.

Accordingly, the present invention has been made in view of the above circumstances, and an object thereof is to provide a user with each delay time and gain adjustment value for the multi-channel in the multi-channel data reproduction processing apparatus of the compact disc proposed in Patent Application No. 94-10466. Direct control, each channel in a matrix form, and control the channel from the data conversion means to the amplifier to improve the realism of the user's feeling, and to selectively listen to the multiple The present invention provides a multichannel control apparatus for a channel audio reproduction system.

According to a preferred embodiment of the present invention, in order to achieve the above object, data obtained from a plurality of data sources is separated and recorded into N channels, and each MPEG channel is converted into digital signals and compressed by MPEG algorithm. A key input unit for assigning a unique channel number to the channel, selecting a channel to listen to during playback of a compact disc having recorded the channel number in the channel number of the subheader, and inputting a delay time and a gain adjustment value for the selected channel; A microcomputer for controlling the processing operation of the multi-channel data on the compact disc based on the listening channel, the delay time and the gain adjustment value, and switching switching means for switching and outputting the data of the selected channel, which is analog-converted by the data converting means, under the control of the microcomputer. A data of the analog-converted selected channel applied through the switching switching means. A multi-channel control apparatus of a multi-channel audio reproduction system comprising a delay adjustment means for performing a processing delay operation on the data, and a gain adjustment means for adjusting the gain of the data of the selected channel delayed by the delay adjustment means and applying it to the amplification means. Is provided.

Preferably, the switching switching means is composed of N × N switching elements.

According to the present invention configured as described above, data obtained from a plurality of data sources is separately recorded and recorded into N channels, and the MPEG algorithm converts and compresses the music signal of each channel (e.g., the music signal played by the orchestra) into digital. Then, when playing a compact disc that assigns a unique channel number to each channel and records the channel number in the channel number of the subheader, the channel to be listened to by the key input unit is selected, and the delay time and gain adjustment value for the selected channel are When input, the data of the selected channel analog-converted by the data converting means is applied to the gain adjusting means with a predetermined time delay from the delay adjusting means through the switching switching means under the control of the microcomputer, and the gain adjusting means is controlled under the control of the microcomputer. To adjust the gain of the data of the input selection channel, the gain-adjusted selection channel The data is output via the amplifying means.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

3 is a circuit diagram of a multi-channel control apparatus of a multi-channel audio reproduction system according to the present invention, wherein the apparatus according to the present invention includes a key input unit 40, a microcomputer 42, a switching switching means 44, and a delay adjusting means 46. ), The gain adjusting means 48.

In the figure, the key input section 40 separates and records data obtained from a plurality of data sources into N channels, and converts music signals (e.g., music signals played by an orchestra) into digital channels by an MPEG algorithm. After compacting, a control function for a disc reproducing apparatus employing a compact disc in which a unique channel number is assigned to each channel and the channel number is recorded in the channel number of the subheader is set. When playing a disc, it is possible to select a channel to listen to and input a desired delay time and gain adjustment value for the selected channel (i.e., a selected instrument among a plurality of instruments), for example, the key input unit 40. There are N channel selection buttons and a button for inputting an arbitrary delay time for the selected channel and an arbitrary gain adjustment value for the selected channel. This is the input button to be equipped with additional.

The microcomputer 42 controls the overall operation of the disc reproducing apparatus according to the setting signal from the key input unit 40, while the channel selection signal input from the key input unit 40 and the delay time and gain adjustment for the selected channel. On the basis of the stationary control, the multi-channel data processing operation for the compact disc is performed.

The switching switching means 44 converts the control signal of the microcomputer 42 into the audio data for each channel converted into the analog signal by the data conversion means 28 (that is, the channel selection signal input from the key input unit 40). Switching operation so as to be selectively output in accordance with the control signal on the basis of the control signal).

Here, the switching switching means 44 wherein the data converting means 28 form the switching elements of the N × N for each channel by the audio signal source (S ₁ ~S _N) outputted from the (SW _1,1 ~SW _{N , N} ) is installed in a matrix form.

The delay adjusting means 46 delays the audio data of the selected channel which is switched and output from the switching switching means 44 for a predetermined time under the control of the microcomputer 42 and applies it to the read-back adjusting means of the next stage.

Here, the delay adjustment means 46 is preferably comprised of a delay element (T ₁ ~T _N) as the number corresponding to the multi-channeled each channel audio signal source (S ₁ ~S _N) a.

The gain adjusting means 48 adjusts the gain to the amplifier 32 in accordance with the gain control signal provided from the microcomputer 42 with respect to the audio data of the selected channel delayed by the delay adjusting means 46 for a predetermined time. Is authorized.

Here, the gain control means 48 is preferably comprised of a device (K ₁ ~K _N) a plurality of gain adjustment to be connected one-to-one to the delay elements (T ₁ ~T _N).

Next, the operation of the multi-channel control apparatus of the multi-channel audio reproduction system according to the present invention configured as described above is as follows.

In the description of the embodiment of the present invention, it is assumed that the playing sound obtained from a plurality of musical instruments constituting an orchestra as a data source is recorded as sector data in the sector data area for each sector of the compact disc shown in FIG. .

First, the microcomputer 42 drives and controls the disc reproducing apparatus (see FIG. 1) according to the compact disc reproducing command from the key input unit 40 so that the data recorded for each sector from the compact disc is reproduced and output. The sector-by-sector data (musical performance data) includes a CD-ROM sector decoding / multiplexing unit (see FIG. 1) 22, a data buffer (see FIG. 1) 24, and an MPEG audio decoder (see FIG. 1). After the analog conversion in the data conversion means 28, it is applied to the switching switching means (44).

Here, for example, the listener selects only to listen to channels 1, 3, and N by using a button additionally provided in the key input unit 40, and a predetermined delay time for each of the channels 1, 3, and N, respectively. Δt) and the case when setting the yideukjo value (Δg), the microcomputer 42 are controlled so that only the switching element (SW _{1, 1} and SW _{3, 3} and SW _{N, N)} corresponding in switching the switching means 44 oN and At the same time, the microcomputer 42 controls only the corresponding delay elements T ₁ , T ₃ , T _N in the delay adjusting means 46 to operate on the basis of the input delay time Δt for each of In addition, only the corresponding gain adjusting elements K ₁ , K ₃ , K _{N in} the gain adjusting unit 48 are controlled to operate based on the gain adjusting value Δg inputted for each. Accordingly, the signals (ie, S ₁ , S ₃ , S _N ) for the analog-converted channels 1, _3, and _N are mediated by the switching devices SW _{1, 1} and SW _{3, 3,} and SW _{N, N.} After inputting to the delay elements T ₁ , T ₃ , T _N corresponding to each of the low delays, the gain is adjusted by the gain adjusting elements K ₁ , K ₃ , K _N after a predetermined time delay. Subsequently, the gain-adjusted signal (ie, S ₁ , S ₃ , S _N ) for the corresponding instrument output from the gain adjusting gain elements K ₁ , K ₃ , K _N is mediated through the corresponding amplifier 32. This is output through a sound output device (eg, speaker 34; see FIG. 1) corresponding to the corresponding channel.

Unlike the above example, for example, the listener listens to only the channel 1 through all the output channels (that is, all the speakers provided in the sound output means) by using a button additionally provided in the key input unit 40. When the predetermined delay time Δt and the gain adjustment value Δg are set for the channel 1 only, the microcomputer 42 switches the switching elements SW _{1 and 1} in the switching switching means 44. And SW _{N, 1} and SW _{N, 2 to} SW _{N, N-1} ) are controlled to be on, and at the same time, the microcomputer 42 controls all the delay elements T _{1 to} T _N in the delay adjusting means 46. Control to operate based on the input delay time Δt and control the overall gain adjusting elements K _{1 to} K _{N in} the gain adjusting means 48 to operate based on the input gain adjusting value Δg. do. Accordingly, the signal (ie, S ₁ ) for the analog-converted channel 1 is delayed by the switching elements SW _{1, 1} and SW _{N, 1} and SW _{N, 2 to} SW _{N, N-1} . After the input to T _{1 to} T _N is delayed for a predetermined time, the gain is adjusted by the gain adjusting elements K _{1 to} K _N. Subsequently, the gain-adjusted signal (i.e., S ₁ ) for the corresponding instrument output from the gain adjusting gain elements K _{1 to} K _N is transmitted to the sound output device (eg, a speaker) through the whole amplifier 32. 34) through the total output means of FIG. 1).

In other cases, the control is similar to the above-described operation.

According to the present invention as described above, data obtained from a plurality of data sources is separated and recorded into N channels, and the MPEG algorithm converts and compresses the music signals (e.g., music signals played by the orchestra) into digital channels. If a channel to be listened to is selected during playback of a compact disc in which a unique channel number is assigned to each channel and the channel number is recorded in the channel number of the subheader, the delay time and gain adjustment value for the selected channel are input. Since delay and gain are adjusted only for the selected channel and then output through the audio output device, you can feel the realism according to the position of each instrument, as well as change the output port of each instrument in the audio output device. .

Claims (2)

Data obtained from a plurality of data sources is separated and recorded into N channels, and the MPEG algorithm converts and compresses the music signal of each channel to digital, assigns a unique channel number to each channel, and assigns the channel number to the subheader channel. A key input section 40 for selecting a channel to be listened to during playback of the compact disc recorded in the number and inputting a delay time and a gain adjustment value for the selected channel, and based on the listening channel and the delay time and gain adjustment value. A microcomputer 42 for controlling the processing operation of the multi-channel data on the compact disc, a switching switching means 44 for switching and outputting the data of the selected channel analog-converted by the data converting means 28 under the control of the microcomputer 42; Delay adjustment number for performing a processing delay operation for the data of the analog-converted selected channel applied through the switching switching means 44 A stage 46 and a gain adjusting means 48 for adjusting the gain of the data of the selected channel delayed by the delay adjusting means 46 and applying it to the amplifying means 32. Multichannel controller. The multi-channel control apparatus of a multi-channel audio reproduction system according to claim 1, wherein said switching switching means (44) comprises N x N switching elements.