JP4557594B2 - Information reproduction processing system and program thereof - Google Patents

Description

  The present invention relates to an information reproduction processing system that performs specific signal processing on a sound signal obtained from a plurality of media and reproduces and outputs the same, and more particularly to a sound obtained from any of a plurality of connected media. Even if it is a signal, the original sound included in each media information can be reproduced faithfully, and further, the sound signal included in the media information can be reproduced according to the sound conditions according to the user's preference. The present invention relates to an information reproduction processing system and its program.

  In recent years, data has been digitized for information such as music, audio, and video for reasons such as improved characteristics, operational stability, and prevention of quality degradation in the transmission system. Digital data transmission is also being promoted in the broadcasting field such as FM broadcasting. Under such circumstances, media such as DVD, CD, and MD are often used for recording digital data such as music and voice. These digital data are recorded on DVDs, CDs, MDs, etc. and are commercially available, or recorded by users on these media and stored.

  By the way, for example, in an MD system, an audio signal is recorded in a digital manner on a rewritable magneto-optical disk, and the digitized audio signal is subjected to data compression by a high-efficiency encoding process called ATRAC. Then, magneto-optical recording is performed on the magneto-optical disk.

  However, the recording area of the recording disk of the MD system is a spiral groove and is subjected to wave-like wavering at the sampling frequency (44.1 kHz), which is demodulated as ADIP signals as address information on the disk. Therefore, recording is possible only at a sampling frequency of 44.1 kHz.

  Therefore, in a digital signal recording / reproducing apparatus that adopts an MD system and digitally records an input digital information signal on a recording medium, a digital information signal having a sampling frequency other than 44.1 kHz is input. In addition, the digital information signal is once converted into an analog information signal, and further converted into a digital information signal having a sampling frequency of 44.1 kHz, and then the digital information signal is recorded (for example, Patent Documents). 1). With such a configuration, even when a digital audio signal whose sampling frequency is not 44.1 kHz is input, data recording can be performed, and the sampling frequency is 32 kHz or 48 kHz as in BS (satellite broadcasting). Even in this case, recording is possible.

  In addition, a digital FM modulator that supports digital audio input with a digital sampling frequency of 48 kHz has been developed and used in FM stereo broadcast technology (see, for example, Patent Document 2). According to this digital FM modulator, the decoding circuit detects whether the digital sampling frequency of the input digital audio corresponds to 48 kHz, 44.1 kHz, or 32 kHz, and based on the detection result, the DDS circuit Therefore, an output frequency corresponding to the digital sampling frequency is generated and output. Not only an input digital voice with a digital sampling frequency of 48 kHz, but also various input digital voices with 44.1 kHz or 32 kHz can be modulated.

JP-A-6-342560 JP-A-8-307365

  However, in the conventional digital signal recording / reproducing apparatus described above, information having different sampling frequencies can only be dealt with by converting information having different data sampling frequencies into a common frequency. However, signal processing of sound signals of different recording formats is not made common to sound signals included in information.

  In addition to disc recording media such as DVD, CD, and MD, sound information such as music and voice recorded on various media is recorded in various recording formats. With respect to these media, recording formats differ depending on the media, and recording / playback apparatuses are used so that sound information can be recorded or played back correspondingly.

  Recently, a personal computer having a program that has a function of recording information on a medium or a hard disk can be recorded on a DVD or a CD, or recorded on a DVD or CD. Yes. Furthermore, the information can be acquired and reproduced or recorded via the Internet, and television broadcast programs can be recorded as well as displayed on a monitor.

  As described above, the function of recording or reproducing sound information of various media is often mounted in combination with one device. However, when reproducing the sound information of these various media, it is necessary to have a processing function according to the recording format for each media information. When attempting to reproduce each media information, the processing function of each media information is to be reproduced. You must have everything. In addition, when reproducing sound information included in media information, a user often wants to listen to music in a preferred sound quality, sound field, and spatial environment, for example. The sound quality, sound field, and spatial environment are adjusted and set in a signal processing manner suitable for the information recording format, and each adjustment is necessary unless you are familiar with the contents of each media information processing system. It was difficult to perform the operation and complicated operation processing was required. In addition, some of the adjustment functions used in the operation processing may be used in common for each piece of media information. The cost was increased.

  Therefore, in the present invention, signal processing for reproducing sound signals included in various media information is organized and integrated to simplify the original sound signal included in each media information. And an information reproduction processing system capable of reproducing a sound signal included in the media information according to a sound condition according to a user's preference without requiring a particularly complicated operation. An object is to provide a computer program.

In order to solve the above-described problems, in the present invention, in the information reproduction processing system, an input selection circuit for selectively inputting media information from a plurality of media, and at least the media information selected and input from the input selection circuit Sound signal characteristic correction means for extracting a non-characterized sound signal from the sound signal included in the signal, and signal adaptation means for performing an adaptation process for correcting the extracted sound signal to a predetermined characteristic; and Output control means for performing control processing to give a desired characteristic to the sound signal output processed by the signal adaptation means, and the sound signal is given the desired characteristic and transmitted to the electroacoustic conversion means for reproduction. it was decided to be.

The signal adaptation unit corrects the input level of the sound signal related to the media information selected and input by the input selection circuit to a predetermined level, and outputs the sound level to the sound signal characteristic correction unit. The sound signal having the input level corrected is corrected to the predetermined characteristic, and sound signal correction processing means for generating a sound signal output is provided .

  The output control means receives the sound signal output corrected to the predetermined characteristic as input, and applies signal characteristic control means for giving the desired characteristic to the sound signal output, and the sound signal output to which the desired characteristic is given. Output level control means for controlling the output level, and the output control means can adjust a listening condition for the electroacoustic conversion means between the signal characteristic control means and the output level control means. A listening condition control means is provided, or a listening condition adjusting means capable of adjusting a listening condition for the electroacoustic conversion means is provided after the output level control means.

  The sound signal correction processing means includes an electroacoustic conversion correction means for correcting response characteristics related to the electroacoustic conversion means, a space correction means for correcting response characteristics related to an installation space of the electroacoustic conversion means, Including a media signal correction unit that corrects signal characteristics of the sound signal acquired from the media information, the sound signal correction processing unit includes the electroacoustic conversion correction unit, the spatial correction unit, and the media signal correction unit. Any one or a plurality are selected, and the sound signal is corrected to the predetermined characteristic.

  The signal characteristic control means includes a frequency characteristic adjustment means for adjusting a frequency characteristic of the sound signal output corrected to the predetermined characteristic, a sound field setting means for selecting an assumed sound field related to the electroacoustic conversion means, The signal characteristic control means includes the frequency characteristic adjusting means and the sound field setting means, including virtual surround means for setting virtual surround for the sound signal output, and effect setting means for setting an acoustic effect for the sound signal output. Any one of the virtual surround setting means and the effect setting means is selected, and the sound signal is controlled to sound characteristics according to the desired characteristics.

  Further, the signal characteristic control means includes simulation characteristic giving means for giving the electroacoustic conversion characteristic to the sound signal output in order to simulate the output to the specific electroacoustic conversion means related to the sound signal output. .

  The listening condition adjusting unit includes a listening position adjusting unit that can adjust the listening condition related to the listening position with respect to the electroacoustic conversion unit, and a presence adjusting unit that adjusts the sense of reality related to the listening position.

  The output level control means includes a type selection means for selecting the type of the electroacoustic conversion means, a channel setting means for setting an output channel condition for the sound signal output, and a level for adjusting the output level for the sound signal output. The output level control means further includes a dynamic range adjustment means for adjusting a dynamic range for the sound signal and a loudness adjustment means for adjusting a loudness correction for the sound signal.

  The information reproduction processing system of the present invention further includes an input operation means having a graphical user interface for instructing control of the signal adaptation means and the output signal control means, and the sound signal adaptation means The output control means is adjusted and controlled in accordance with an instruction input from the input operation means.

  The input operation means can select and instruct the user to select whether the sound signal included in the media information selected and input is reproduced as an original sound or reproduced as a user desired sound, and the sound signal is selected by the user as desired. In the case of reproducing with sound, the desired sound is selected from a favorite tone color condition, sound field condition, and space condition.

  Furthermore, the input operation means can display a plurality of sound type icons including words or designs in which the sound type is expressed in a sensory manner, and the user selects the sound type icon to select the sound type icon. Or the input operation means uses a sound set in accordance with the level set to the system default sound, the selected medium or the environment regarding the playback mode. The level to be played, the level at which multiple sound characters can be selected and set without much understanding of the system configuration, and the level at which arbitrary adjustment parameters can be set with a good understanding of the system are expressed in words or designs. Service level icons can be displayed, and when the user selects the service level icons, adjustment means related to the sound reproduction are selected. Is automatic, or the desired sound input operation of the user was to be played.

Further, the output control means can generate an output signal by executing a convolution operation process using an impulse response related to the user-desired sound that is instructed to be selected.
As the electroacoustic conversion means, a speaker manufactured in consideration of time characteristics is used.
In the information reproduction processing system according to the present invention, the signal adaptation unit and the output control unit are provided in separate apparatuses as a front stage and a rear stage of the reproduction process, respectively.

In the information reproduction processing program according to the present invention, a non-characterized sound signal is extracted from a sound signal included in media information selected and input from a plurality of media, and the extracted sound signal has predetermined characteristics. The sound signal is provided with the desired characteristic, including a step of performing an adaptation process for correcting, and a step of performing a control process for imparting a desired characteristic to the sound signal output processed by the signal adaptation unit. The computer is executed so that it is transmitted to the electroacoustic conversion means and reproduced.

  As described above, according to the present invention, in order to reproduce a sound signal included in information obtained by selecting from a plurality of media, the signal reproduction processing means of the information reproduction processing system can be easily processed in the subsequent stage. The signal adaptation means for performing optimization and the output control means for performing signal processing on the optimized sound signal according to the user's preference are arranged and integrated. Therefore, the design of the information reproduction processing system can be simplified and the cost can be reduced. And control of signal processing can also be simplified.

  In the information reproduction processing system according to the present invention, the input selection circuit, the input level correction processing means, the sound signal correction processing means, and the signal adaptation means for a plurality of media are arranged in a non-uniform manner for each medium. The volume level and frequency band can be optimized, the subsequent signal processing can be selected accurately, and the original sound of the sound signal included in each media information can be reproduced faithfully. ing.

  Further, in the information reproduction processing system of the present invention, the sound signal included in each media information is optimized in the previous stage, and the optimized sound signal is input in the subsequent stage, the signal characteristic control means, the listening condition Since the control means and the output level control means are arranged, the sound signal included in each media information can be reproduced under conditions according to the user's preference, and the reproduction processing system can be selected accurately. .

  In addition, the information reproduction processing system of the present invention is provided with input operation means having a graphical user interface, and easily selects a sound faithful to the original sound recorded in each media information and a sound reflecting the user's preference. And can be easily reflected by classifying the sound quality, sound field, and spatial environment as the user's preference. Since the sound type icon that directly expresses the user's preferences is displayed on the graphical user interface, the user can easily understand the adjusted sound and select the signal processing with a simple operation. Yes.

  The information reproduction processing system of the present invention is suitable for adopting a speaker that emphasizes time-axis characteristics as electroacoustic conversion means, and by performing a convolution operation of an impulse response, a user's favorite tone and preference It is easy to realize the sound field and the desired spatial environment. Then, pseudo space simulation such as virtual signal processing can be easily performed.

  Next, an embodiment of the information reproduction processing system according to the present invention will be described below with reference to the drawings. Before describing the embodiment, the sound signal included in the media information is set in a specific space. The case of a speaker system according to the prior art that reproduces sound using a speaker that is one of the arranged electroacoustic conversion means will be described.

  FIG. 8 shows a state in which a sound signal recorded in media information is emitted as a reproduced sound from the speaker by the user using the speaker system according to the prior art, and the user is listening to the sound. ing.

  In FIG. 8A, it is assumed that the speaker SP is arranged in an environment of a specific space, for example, in a room R. The speaker SP is supplied with an input signal S (t) reproduced for the sound signal recorded in the media information. Therefore, when the user listens to the sound output from the speaker SP at the position P1 in the room R, the spatial transfer function at the position P1 is H1 (t), and the speaker transfer function at the position P1 is set. Is SP1 (t), the signal relating to the sound heard by the user at the position P1 is S (t) * H1 (t) * SP1 (t). The symbol * used here indicates that this signal can be obtained by a convolution operation.

Here, FIG. 9 shows temporal changes in sound energy output from the speaker SP when an impulse signal is supplied to the speaker SP disposed in the room R. Regarding the waveform shown in FIG. 9 , the horizontal axis represents time, and the vertical axis represents sound energy. Waveform shown in the figure, when the impulse is fed to the arranged speakers SP in the room R, shows how the sound output from the speaker SP is altered under the influence of reflection .

  In the figure, the impulse signal is first supplied to the speaker SP. In the section A, the speaker vibration main body outputs an impulse sound, but the reflected sound is generated in the speaker unit including the speaker vibration main body. . Next, in the B section following the A section, a reflected sound is generated by the speaker box to which the speaker unit is attached. Then, the sound corresponding to the impulse signal is emitted from the speaker box into the room R, reflected on the wall or the like, and becomes a reverberant sound as shown in the C section.

  The speaker transfer function SP (t) related to the speaker SP that places importance on the amplitude frequency characteristic is a part that mainly affects the sections A and B and appears strongly as the individuality of the speaker SP. The spatial transfer function H (t) related to the room R affects the section C. The change state of the sound pressure with respect to the impulse sound shown in FIG. 9 is a result measured at a certain point in the room R forming the spatial environment. Therefore, when the change is measured at another point, the generation of the reflected sound and the reverberant sound indicates a different change state.

Here, when the user wants to listen to the sound of the input signal S (t) itself at a position P1 in FIG. 8A, first, the characteristics of the speaker are determined from the signal at the position P1. It is possible to lose it. At this time, in order to eliminate the characteristics of the speaker, * SP1 (t) ⁻¹ may be used. As a result, in operation, the above signal is
S (t) * H1 (t) * SP1 (t) * SP1 (t) ⁻¹ = S (t) * H1 (t)
It can be.

However, * SP1 a ^{(t) -1} corrected by ^{S (t) * SP1 (t} ) -1 of the signal, as shown in FIG. 8 (b), at a different position P2 is a position P1, the user Considering the case of listening, as described above, the spatial transfer function and the speaker transfer function also change, and the signal at the position P2 is S (t) * H2 (t) * SP2 (t) * SP1 (t) ⁻¹ . Become. As can be seen from this, the signal correction * SP1 (t) ⁻¹ at the position P1 has an additional characteristic added at the position P2. Here, in order to eliminate the speaker characteristics even at the position P2, instead of this correction * SP1 (t) ^-1, a different correction * SP2 (t) ^-1 is required. Become.

  Thus, it can be seen that it is difficult to eliminate the speaker characteristics regardless of the listening position with the conventional speaker. Prior art speakers are designed with an emphasis on amplitude-frequency characteristics, and the time characteristics are not taken into consideration, so that the individuality of the speakers themselves is strongly expressed. Therefore, the sound signals recorded in the media information are It has become difficult to reproduce the faithful sound that has been restored to the original sound. For this reason, even if the user tries to reproduce the sound signal under a condition according to his / her preference, the operation for adjusting to the desired condition becomes complicated and complicated. Also, it is difficult for system designers to design according to the user's preferred conditions, and cost is high when trying to satisfy all of them.

  Therefore, in the information reproduction processing system of the present embodiment, a speaker with an emphasis on time characteristics is adopted as the optimum electroacoustic conversion means that can faithfully reproduce the original sound related to the sound signal included in the media information. For any sound signal recorded in the media information, it is possible to faithfully reproduce the original sound included in each media information, regardless of the media signal obtained from any media information. Further, the signal processing is performed according to the sound condition according to the user's preference without requiring a particularly complicated operation, and the sound signal included in the media information can be reproduced. In addition, a program for causing a computer to execute such information reproduction processing is used.

  FIG. 1 shows a schematic block configuration representing basic functions in the information reproduction processing system of the present embodiment.

  An information reproduction processing system 1 according to the present embodiment is a sound information reproduction device incorporated in an audio reproduction device or a personal computer, and a sound signal included in information obtained by selecting from a plurality of media 2 connected as a sound source. Is digitally processed, and the processed signal is reproduced by the speaker 3. The reproduction processing system may be mounted on an in-vehicle audio device or navigation device. The information reproduction processing system 1 includes an input operation device 4 for setting or adjusting various conditions in order to reproduce a sound signal of media information desired by the user. The input operation device 4 is provided with a graphical user interface (GUI) so that the user can easily perform an input operation. Instructions relating to various processing operations are given to the information reproduction processing system 1 through the GUI display screen. Is called.

  The information reproduction processing system 1 is roughly divided into two functional blocks, one of which is a signal adaptation device 5 and the other is an output control device 6. The signal adapting device 5 renders the sound signal obtained from the medium 2 non-characteristic to the sound signal that the medium has individually, extracts the original sound recorded on the medium, and adapts it to subsequent processing. It has a function to do. Furthermore, it has a function of optimizing the input signal so that it is output in the state of the original sound to the speaker connected to the information reproduction processing system 1.

  Further, the output control device 6 is adapted to transmit and input the sound signal output by the signal adaptation device 5 in the previous stage, and the input operation device for the adapted and optimized sound signal. Signal processing is performed in accordance with the user's preference input from 4. The sound signal subjected to the signal processing is output-adjusted and output to the speaker 3, and finally, the sound signal recorded on the medium 2 is reproduced in accordance with conditions that suit the user's preference.

  As described above, in the information reproduction processing system according to the present embodiment, the signal processing is organized and integrated into the two functional blocks of the signal adaptation device 5 and the output control device 6. In both cases, the sound signal can be de-characterized in common and can be extracted in the state of the original sound, and signal processing according to the user's preference for the input sound signal is executed in the subsequent stage. It is easy. In addition, this consolidation can simplify the design of the information reproduction processing system and reduce costs. And control of signal processing can also be simplified.

  Next, FIG. 2 shows a schematic block configuration of the first embodiment having a more specific function related to the information reproduction processing system 1 of the present embodiment shown in FIG. .

  The signal adaptation device 5 includes an input selection circuit 51, an input level correction device 52, and a sound signal correction processing device. The input selection circuit 51 has a function of selectively acquiring a sound signal included in the media information from the medium 2, and can connect a plurality of media M1 to Mn as the information reproduction processing system 1. Yes. If the media that the user wants to reproduce music or the like is, for example, a DVD, the DVD is loaded in the drive. Therefore, the input selection circuit 51 detects this attachment and takes in a sound signal from the media information recorded on the DVD.

  Next, the sound signal acquired by the input selection circuit 51 is input to the input level correction processing device 52. The input level correction processing device 52 corrects the average level of the sound signal recorded on the medium to a predetermined level. This is because the average level of the recorded sound signal is set to be different for each medium. For example, when the medium is changed from a DVD to a CD, the sound may be reduced when the sound is reproduced on the CD. When the sound from the DVD is reproduced after the sound is reproduced from the DVD at a certain volume, the reproduction output is lowered. For this reason, when reproducing sound from a CD, the output level must be readjusted, and such a readjustment operation for each medium is troublesome, so that a sound signal from any medium is input. However, different average levels are corrected to predetermined levels so that these average levels do not affect subsequent signal processing.

  Further, depending on the media information by the media M1 to Mn, the band balance for the sound signal may be adjusted and recorded. If this band balance differs depending on the sound signal acquired by the input selection circuit 51, as in the case of the average level, for example, when the tone is adjusted according to the user's preference, every time the medium is switched. Therefore, in order to execute reproduction according to the user's preference, it is impossible to adjust smoothly unless the user knows the details of the system. In order to avoid this bothersomeness, the sound signal correction processing device 53 returns the band balance given to the sound signal corrected by the input level correction processing device 52 to the state of the original sound before recording. Correction processing is executed.

  Further, when the spatial environment in which the speaker 3 connected to the information reproduction processing system 1 is arranged, for example, in the case of an in-vehicle audio device, the spatial environment is a vehicle compartment, The sound from the speaker of the audio device is distorted due to the response characteristics of the spatial environment. Therefore, even if the sound signal recorded on the medium is adjusted and reproduced from the speaker, it is difficult to faithfully reproduce the original sound. Therefore, before the signal processing is executed under conditions according to the user's preference, the sound signal correction processing device 53 uses the spatial environment that can be grasped in advance, for example, the response characteristics in the passenger compartment, Correct the effects of reflection and noise.

  In addition, if the speaker 3 connected to the information reproduction processing system 1 is a speaker that emphasizes time characteristics, the speaker has sufficient speaker response characteristics suitable for faithfully reproducing the original sound. It is not necessary to correct the speaker response characteristics before the signal processing is performed with the condition according to the user's preference. However, when the connected speaker 3 is a speaker that places importance on normal frequency characteristics, as described above, the speaker has characteristics unique to the speaker. The speaker response characteristic changes. In view of this, the sound signal correction processing device 53 is adapted to correct the influence of speaker specific characteristics, speaker arrangement, and the like on the sound signal whose input level has been corrected, and to optimize the signal processing in the subsequent stage. it can.

  As described above, the sound signal selected and input from the medium 2 is subjected to correction processing in the signal adaptation device 5, whereby the original sound before being recorded on the medium is extracted and optimized. In the subsequent stage, signal processing according to conditions according to the user's preference is facilitated. Next, the corrected sound signal is transmitted to the output control device 6.

  The output control device 6 has a function of executing signal processing for generating a user's favorite sound based on the transmitted sound signal. This function is executed by the signal characteristic control device 61 and the output level control device 62.

  In the signal characteristic control device 61, characteristics of the sound signal output from the speaker 3 are imparted to the sound signal so as to obtain conditions according to the user's preference, for example, timbre, sound field, sound effect, and the like. Alternatively, it has a function of simulating a speaker type according to the user's preference as to what kind of sound is output from the speaker 3 when a condition is input. Accordingly, the simulation of the corrected sound signal is performed.

  The sound signal imparted with characteristics in the signal characteristic control device 61 is transmitted to the output level control device 62, where the output level is adjusted according to the user's preference in accordance with the speaker system configuration in the speaker 3. .

  In the information reproduction processing system according to the first embodiment described so far, as shown in FIG. 2, in order to generate a sound according to the user's preference, the output control device 6 has a signal characteristic control device. 61 and an output level control device 62 are provided. These adjustment functions do not take into account conditions related to the listening position on the user side. FIG. 3 shows a schematic block configuration of the information reproduction processing system according to the second embodiment to which a function capable of adjusting the listening position condition is added.

  The information reproduction processing system according to the second embodiment shown in FIG. 3 is based on the configuration of the information reproduction processing system according to the first embodiment, but in the information reproduction processing system according to the second embodiment, the system In the output control device 6 connected to, the listening condition control device 63 is inserted between the signal characteristic control device 61 and the output level control device 62.

  The listening condition control device 63 uses the signal characteristic control device 61 to listen to the sound signal that has been given a characteristic so as to have a timbre that satisfies the user's preference at the listening position indicated by the user. It has a function to adjust to conditions, and also has a presence equalizer function that gives a sense of realism.

  By the way, in the information reproduction processing system according to the second embodiment shown in FIG. 3, the listening condition control device 63 is inserted between the signal characteristic control device 61 and the output level control device 62. 4 shows a modification according to the second embodiment in which the insertion position of the listening condition control device 63 is changed to the rear stage of the output level control device 62, that is, the output side to the speaker.

  In the information reproduction processing system according to the modification shown in FIG. 4, when the sound signal corrected by the signal adaptation device 5 is transmitted to the output control device 6, the signal characteristic control device 61 and the output level control device 62. In the order of the listening condition control device 63, signal processing is performed in accordance with conditions according to the user's preference. The processing functions of these control devices are the same as those in the output control device 6 shown in FIG. 3, and only the processing order is changed.

  In the above, the outline of the functions related to the first and second information reproduction processing systems has been described using schematic blocks. FIG. 5 shows specific means for performing the function of the signal adaptation device 5, and FIG. 6 shows specific means for achieving the function of the output control device 6. The input level correction processing device 52 and the sound signal correction processing device 53 of the signal adaptation device 5 shown here, and the signal characteristic control device 61 and the output level control device 62 of the output control device 6 are the first and second. It can be used in common for each of the embodiments.

  In the signal adaptation device 5 shown in FIG. 5, the input level correction processing device 52 a) relates to the average level of the sound signal recorded in each of the media M1 to Mn connected to the input selection circuit 51. Input level correction means for correcting a non-uniform level among media to a predetermined level suitable for signal processing in the subsequent stage is provided.

  In addition, the sound signal correction processing device 53 is provided with a) speaker response correcting means for correcting the inherent characteristics of the speaker 3 connected to the system 1 and outputting sound and the influence of the installation position, and b) the speaker 3. Room response correcting means for correcting the influence of reflection and noise in the room, and c) when the signal band limitation (band balance) is adjusted to the sound signal recorded on each medium, the band limitation is corrected. And sound signal characteristic correcting means.

  On the other hand, in the output control apparatus 6 shown in FIG. 6, the signal characteristic control apparatus 61 includes a) equalizer means for adjusting frequency characteristics such as a graphical equalizer, a parametric equalizer, a bass, and a treble; and b) a speaker 3. Sound field means for adjusting the sound field relating to the sound output from the sound source, c) virtual surround means for realizing a virtual surround effect by two speakers or three speakers, and d) effects such as delay, reverberation, chorus, etc. And e) speaker simulation means for simulating the speaker type according to the user's preference.

  The output level control device 62 includes a) output device selection means for selecting the output of speakers, headphones, etc., which are electroacoustic conversion means connected to the reproduction processing system 1, and b) stereo, 5.1. Output channel selection means for selecting the number of channels related to the speaker connected to the reproduction processing system, such as channels, c) output signal level control means for adjusting the output level of each output channel, and d) output Dynamic range control means for adjusting the dynamic range of the sound signal to be output; e) Dolby DRC means for adjusting the Dolby dynamic range control; and f) loudness control for correcting the loudness of the output sound signal. Means.

  Then, the listening condition control device 63 a) makes the listening condition that is optimal at the listening position indicated by the user for the sound signal that has been given a characteristic so as to have a tone color that meets the user's preference. There are provided listening position adjusting means for adjusting, and b) presence adjusting means having a presence equalizer function for giving a sense of presence.

  As described above, in the information reproduction processing system of this embodiment, in order to reproduce each sound signal acquired from the plurality of media M1 to Mn, the signal adaptation device and the output control device First, for the selected input sound signal, the original sound is extracted and the sound signal is de-characterized, and then the de-characterized sound signal is used. Characteristics were given according to the conditions according to the user's preference.

  Therefore, when trying to reproduce the sound signal recorded on the media under the conditions according to the user's preference using the conventional reproduction processing system, it is affected by the unique sound signal characteristics of the media and complicated. However, according to the information reproduction processing system of this embodiment, not only can the original sound related to the sound signal acquired from the media be faithfully reproduced, but also the conditions according to the user's preference. When playing with, the necessary timbre adjustment can be performed independently without being influenced by the specific characteristics of the media, and the condition setting input operation is simplified.

  In addition, when designing a system that acquires sound signals from multiple media and reproduces the sound, there is no need to introduce multiple playback processing systems for each media, and the processing function of the digital signal processor that performs signal processing is simplified. The cost can be reduced.

  In addition, according to the information reproduction processing system of the present embodiment, when reproduction is performed under conditions according to the user's preference, the adjustment items related to the necessary timbre can be set independently regardless of the specific characteristics of the media. Since the setting input operation is simplified, the configuration of the input operation device 4 described above can be simplified and can be easily used by the user.

  The input operation device 4 is provided with a graphical user interface (GUI) so that the user can easily perform an input operation, and gives instructions related to various processing operations to the information reproduction processing system 1 through a GUI display screen. be able to. For example, the display screen displays a selection icon for reproducing the original sound faithfully and a user's favorite sound, a setting input icon corresponding to each adjustment item, and the like.

  When the case of reproducing the original sound faithfully is selected, the original sound is extracted from the sound signal acquired from the medium by the signal adapting device 5, and the original sound signal is programmed to be output to the speaker 3. In addition, when the user selects the case of reproducing with the user's favorite sound, the user inputs using the setting input icons. In accordance with the input of the setting input icon, various adjustment means provided in the output control device 6 are selected and programmed so that individual adjustment amounts are set.

  In addition to providing setting input icons corresponding to each adjustment item, the user does not understand the contents and meaning of each adjustment item, and further, he wants to play it intuitively without knowing detailed operation procedures. In order to select a favorite sound, a sound type icon with a name directly expressed for the desired sound to be reproduced may be provided. For example, “soft sound”, “hard sound”, “live sound”, “dead sound”, “clear sound”, and the like. The related adjustment means are selected and set in advance so as to obtain these favorite sounds. When the user selects any of these name input icons, the signal adaptation device 5 is selected according to the selection. The sound signal corrected in step (2) can be programmed so as to be signal-processed into a desired sound by a related adjusting means in the output control device 6.

  FIG. 7 shows a specific example of signal adjustment when the sound type icon displayed on the GUI screen is selected. FIG. 7A shows a case where the user selects the sound type icon “soft sound”, and FIG. 7B shows a case where the user selects the sound type icon “hard sound”. ing. In order to perform reproduction processing with “soft sound”, the equalizer means of the signal characteristic control device 61 is set in advance so as to lower the high frequency region of 10 kHz or more to a predetermined level. It is set in advance so as to give a reverberation effect of strength. For “hard sound”, the equalizer means of the signal characteristic control device 61 is set in advance so that the low frequency region of 100 Hz or less and the high frequency region of 5 kHz or more are increased to a predetermined level. The means is set in advance so that a reverberation effect having an appropriate strength is applied.

  In this way, even if the user does not know how to adjust each adjustment means, if “soft sound” or “hard sound” is selected from the sound type icons, “soft sound” or “hard sound” is selected. The signal is automatically adjusted in the output control device 6 in response to the “good sound”, and the desired sound is reproduced. In addition to the above-mentioned favorite sound types, there are other types of sounds that can be expressed sensibly, such as “warm sound”, “sad sound”, and “good sound”. In the case of playback, each adjustment means of the output control device is set in advance so that the sound can be of various tastes without knowing the adjustment elements based on specialized expressions such as frequency, reverberation time, delay time, etc. Thus, the user can reproduce the sound with a favorite sound simply by selecting a sound type icon expressed in words or designs.

  Further, the input operation device 4 can be provided with a function capable of selecting the service level of the reproduction processing system according to the level of system understanding of the reproduction by the user. For example, the sound recommended by the system manufacturer is defaulted and is played with the sound set to the level 1 (initial setting state) that is played with the sound that is initially set in the system and the selected media or environment Level 2 (basic state), level 3 (standard state) where you can select and set multiple sound characters without having to understand the system configuration much, and set any adjustment parameters with a good understanding of the system You may make it select 4 levels of the possible level 4 (professional state).

  When level 1 and level 2 are selected, the user's preference is automatically set, but for levels 3 and 4, the user's preference is selected by the user himself. For example, when level 3 is selected, the user selects “bass”, “treble”, or “middle” for the equalizer means, and “hall”, “church”, “stadium”, “sound” for the sound field means. "Jazz" or the like, select "On" or "Off" for the virtual surround means, select "On" or "Off" for the sound compression, and further select the "On" or "Off" In the case of the vehicle interior, the driver seat, the passenger seat, and the rear seat are selected.

  On the other hand, if level 4 is selected, the user selects “graphical equalizer” or “parametric equalizer” for the equalizer means, selects “Dolby” or “reverberation” for the sound field means, For the virtual surround means, one of “VDD”, “Dolby Pro Logic”, “SRS”, and “Q Surround” is selected, and the compression type is selected for sound compression.

  As described above, according to the information reproduction processing system according to the present embodiment, the sound signal recorded on the medium can be reproduced faithfully to the original sound by a simple operation through the input operation device having the graphical user interface. It is also possible to select and play a favorite tone color, sound field, and environment under conditions according to the user's preference. And even if the signal characteristics differ depending on the type of media, it is possible to commonly set conditions according to the user's preference for sound signals acquired from any media. In addition, when displaying an icon for selection or operation such as a sound type icon, not only a word indicating a type but also a symbol or a design can be used.

It is a figure explaining the basic schematic structure of the apparatus which concerns on the information reproduction | regeneration processing system by this invention. It is a block block diagram explaining 1st Embodiment of the information reproduction | regeneration processing system by this invention. It is a block block diagram explaining 2nd Embodiment of the information reproduction | regeneration processing system by this invention. It is a block block diagram explaining the modification of 2nd Embodiment of the information reproduction | regeneration processing system by this invention. It is a figure explaining the specific block configuration of the signal adaptation apparatus in the information reproduction | regeneration processing system of this embodiment. It is a figure explaining the specific block configuration of the output control apparatus in the information reproduction | regeneration processing system of this embodiment. It is a figure explaining the specific example of the signal adjustment at the time of selecting the sound type icon in the information reproduction | regeneration processing system of this embodiment. It is a figure explaining a speaker characteristic changing according to a listening position, when listening to the sound output from a speaker. It is a figure explaining the temporal energy change of the sound output in the room from the speaker when the impulse signal is supplied to the speaker.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Information reproduction processing system 2 ... Media 3 ... Speaker 4 ... Input operation device 5 ... Signal adaptation device 51 ... Input selection circuit 52 ... Input level correction processing device 53 ... Sound signal correction processing device 6 ... Output control device 61 ... Signal Characteristic control device 62 ... Output level control device 63 ... Hearing condition control device

Claims (20)

An input selection circuit for selectively inputting media information from a plurality of media;
And at least sound signal characteristic correcting means for extracting a non-characterized sound signal from the sound signal included in the media information selected and input from the input selection circuit, wherein the extracted sound signal has a predetermined characteristic. A signal adaptation means for performing an adaptation process to be corrected;
Output control means for performing control processing for imparting desired characteristics to the sound signal output processed by the signal adaptation means,
An information reproduction processing system, wherein the sound signal is imparted with the desired characteristics and transmitted to an electroacoustic conversion means for reproduction. The signal adaptation means includes
Input level correction processing means for correcting the input level of the sound signal related to the media information selected and inputted by the input selection circuit to a predetermined level, and outputting the sound signal characteristic correcting means ;
Sound signal correction processing means for correcting the sound signal whose input level is corrected to the predetermined characteristic and generating a sound signal output ;
The information reproduction processing system according to claim 1 , further comprising: The output control means includes
A signal characteristic control means for inputting the sound signal output corrected to the predetermined characteristic and giving the desired characteristic to the sound signal output;
Output level control means for controlling an output level with respect to the sound signal output to which the desired characteristic is given;
The information reproduction processing system according to claim 2 , further comprising: The output control means, between said signal characteristic control means and said output level control means, according to claim 3, characterized in that it comprises a listening condition control means capable of adjusting the listening conditions for the electro-acoustic conversion means Information reproduction processing system. 4. The information reproduction processing system according to claim 3 , wherein the output control unit includes a listening condition adjusting unit that can adjust a listening condition for the electroacoustic conversion unit at a subsequent stage of the output level control unit. The sound signal correction processing means includes
Electroacoustic conversion correcting means for correcting response characteristics related to the electroacoustic converting means;
Space correction means for correcting a response characteristic related to an installation space of the electroacoustic conversion means;
Media signal correction means for correcting signal characteristics of the sound signal acquired from the media information,
The sound signal correction processing means selects any one of the electroacoustic conversion correction means, the space correction means, and the media signal correction means, and corrects the sound signal to the predetermined characteristic. The information reproduction processing system according to any one of 2 to 5 . The signal characteristic control means includes
A frequency characteristic adjusting means for adjusting a frequency characteristic of the sound signal output corrected to the predetermined characteristic;
Sound field setting means for selecting an assumed sound field according to the electroacoustic conversion means;
Virtual surround means for setting virtual surround to the sound signal output;
Effect setting means for setting an acoustic effect for the sound signal output,
The signal characteristic control means selects one or more of the frequency characteristic adjustment means, the sound field setting means, the virtual surround setting means, and the effect setting means, and makes the sound signal in accordance with the desired characteristics. The information reproduction processing system according to any one of claims 3 to 6 , wherein control processing is performed on the sound characteristics. The signal characteristic control means includes simulation characteristic giving means for giving the electroacoustic conversion characteristic to the sound signal output in order to simulate an output to the specific electroacoustic conversion means related to the sound signal output. The information reproduction processing system according to any one of claims 3 to 7 . The listening condition adjusting means is
Listening position adjusting means capable of adjusting the listening condition relating to the listening position with respect to the electroacoustic conversion means;
The information reproduction processing system according to any one of claims 4 to 8 , further comprising presence adjusting means for adjusting a sense of reality related to the listening position. The output level control means includes
Type selection means for selecting the type of the electroacoustic conversion means,
Channel setting means for setting an output channel condition for the sound signal output;
The information reproduction processing system according to claim 3 , further comprising a level adjustment unit that adjusts an output level with respect to the sound signal output. The output level control means includes
Dynamic range adjusting means for adjusting a dynamic range for the sound signal;
The information reproduction processing system according to claim 10 , further comprising: a loudness adjusting unit that adjusts a loudness correction for the sound signal. Input operation means having a graphical user interface for instructing control of the signal adaptation means and the output signal control means;
The information reproduction processing system according to any one of claims 1 to 11 , wherein the sound signal adaptation unit and the output control unit are adjusted and controlled according to an instruction input from the input operation unit. . 13. The information reproduction according to claim 12 , wherein the input operation means can select and instruct to select whether the sound signal included in the media information selected and input is reproduced with an original sound or reproduced with a user-desired sound. Processing system. 14. The information reproduction process according to claim 13 , wherein when the sound signal is reproduced with the user-desired sound, the desired sound is selected from a desired timbre condition, a sound field condition, and a spatial condition. system. The input operation means can display a sound type icon including a word or a design in which the type of sound is expressed sensuously,
14. The information reproduction processing system according to claim 13 , wherein when the user selects the sound type icon, a reproduction instruction with a sound desired by the user is selected. The input operation means does not understand so much about the playback mode, the level to be played back with the sound initially set in the system, the level to be played back with the sound set according to the selected medium or environment, and the system configuration. Even if you can select and set multiple sound characters, and understand the system well, you can display a service level icon expressed in words or patterns that can set any adjustment parameter,
When the user selects the service level icon, an adjustment item related to the sound reproduction is selected, and the desired sound is reproduced automatically or by an input operation of the user. The information reproduction processing system according to claim 13 . 17. The output control unit according to claim 14 , wherein the output control means generates an output signal by executing a convolution calculation process using an impulse response related to the user-desired sound that is instructed to be selected. Information reproduction processing system described in 1. The information reproduction processing system according to any one of claims 6 to 17 , wherein the electroacoustic conversion means is a speaker manufactured in consideration of time characteristics. 2. The information reproduction processing system according to claim 1, wherein the signal adaptation unit and the output control unit are provided in separate apparatuses as a preceding stage and a subsequent stage of the reproduction process, respectively. Extracting a non-characterized sound signal from a sound signal included in media information selected and input from a plurality of media, and performing an adaptation process for correcting the extracted sound signal to a predetermined characteristic;
Performing a control process for imparting a desired characteristic to the sound signal output subjected to the adaptation process,
An information reproduction processing program for causing a computer to execute so that the sound signal is imparted with the desired characteristics, transmitted to an electroacoustic conversion means, and reproduced.

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