Source: https://patents.google.com/patent/JP3498888B2/en
Timestamp: 2020-02-26 14:25:50
Document Index: 416357390

Matched Legal Cases: ['Application No. 6', 'Application No. 7', 'Application No. 7', 'Application No. 7', 'Application No. 7', 'Application No. 5']

JP3498888B2 - Surround signal processing apparatus and method, video / audio reproduction method, recording method and recording apparatus on recording medium, recording medium, transmission method and reception method of processing program, and transmission method and reception method of recording data - Google Patents
Surround signal processing apparatus and method, video / audio reproduction method, recording method and recording apparatus on recording medium, recording medium, transmission method and reception method of processing program, and transmission method and reception method of recording data
JP3498888B2
JP3498888B2 JP13594197A JP13594197A JP3498888B2 JP 3498888 B2 JP3498888 B2 JP 3498888B2 JP 13594197 A JP13594197 A JP 13594197A JP 13594197 A JP13594197 A JP 13594197A JP 3498888 B2 JP3498888 B2 JP 3498888B2
JP13594197A
JPH10174197A (en
智博 毛利
敏之 飯田
1996-10-11 Priority to JP28935196 priority Critical
1996-10-11 Priority to JP8-289351 priority
1997-05-09 Application filed by 日本ビクター株式会社 filed Critical 日本ビクター株式会社
1997-05-09 Priority to JP13594197A priority patent/JP3498888B2/en
1997-10-11 Priority claimed from KR1019970052210A external-priority patent/KR100292778B1/en
1998-01-20 Priority claimed from CNB981043380A external-priority patent/CN1136758C/en
1998-06-26 Publication of JPH10174197A publication Critical patent/JPH10174197A/en
2004-02-23 Publication of JP3498888B2 publication Critical patent/JP3498888B2/en
From a pair of speakers located at the right
Audio signal for obtaining the same sound field effect as the surround system
Signal processing apparatus and method for reproducing sound
And audio / video reproduction method, recording method and recording on recording medium
Device, recording medium, transmission method and reception method of processing program
Method, and the method of transmitting and receiving recorded data.
You. [0002] 2. Description of the Related Art At present, many audio signals of a movie are multi-total.
Recorded on the rack. This signal is recorded in two channels.
Special encoding system is required for recording media
Becomes Therefore, as a means for inserting the medium, a predetermined
The round method is widely used. In recent years, broadcast media
Encoding processing of a predetermined surround method even for part of the audio
Is being broadcast. The encoded signal
In order to play back, the dedicated decoding for the specified surround system is required.
In short, 2-channel stereo signal L, R, stereo
A center channel signal C for improving the center position,
And surround signal to obtain surround sound effect
No. (rear channel signal) S for 5 speakers
Need to play with. However, in ordinary households,
Not very popular due to the complexity of the lines. Therefore,
The authors disclosed in Japanese Patent Application No. Hei 5-34371 (Japanese Patent Application Laid-Open No. Hei 6-233).
394), Japanese Patent Application No. 6-197356 (Japanese Unexamined Patent Application Publication No.
No. 51698), Japanese Patent Application No. 7-161584
JP-A-8-336199) and Japanese Patent Application No. 7-2866.
No. 5 (JP-A-8-205297), etc.
Sound field equivalent to the required speaker, almost symmetrical to the listener
From a pair of speakers placed in a convenient front position.
The proposed surround signal processing device has been proposed. [0003] However, this is not the case.
Signal processing such as DSP (Digital Signal Processor)
In case of realizing with MPU, is there a large amount of data and a heavy load on MPU?
Currently, it is currently realized using two DSPs
Therefore, it is possible to perform the same signal processing using one DSP.
Is desired. The present invention has been made in view of the above points.
In this case, one is arranged at a substantially symmetrical front position with respect to the listener.
To play all channels with twin speakers
Efficient signal processing using a single DSP
To obtain a surround signal processing device
Things. Also, a surround signal processing method and video
Audio reproduction method, recording method and recording device on recording medium, recording method
Recording medium, transmission method and reception method of processing program, list
To provide a transmission method and a reception method for recording data.
It is the purpose. [0005] A surround according to the present invention
The signal processing device outputs the encoded signal of the surround signal.
No. 2 channel stereo signal and surround sound
Rear channel signal to obtain the effect
To improve the sound image localization in the center of the stereo signal
Of 4 channel signals of the center channel signal of
Decoder means and 4 output by the decoder means
The channel signal is processed and the listener
Surround from a pair of speakers placed in a common front position
A processor for reproducing sound;
The processor section has four channels output from the decoder means.
1/2 decimation for channel signal sampling
Thinning means for performing sampling, and sampling via the thinning means.
Odd and even samples for the ringed signal
The sound image localization process and the sound field process of adding the reflected sound are performed for each
Signal processing means. [0006] The processor section includes a pair of switches.
The pair of left and right surround signals reproduced from the speaker
Image localization filter for pseudo-stereo by adding decorrelation to sound
Reproduction of the surround signal or a pair of left and right surround signals with opposite phases
Having any of sound image localization filter means for causing
It is characterized by the following. Further, the processor unit is provided for each sample.
The generation of aliasing noise due to the thinning processing of the thinning means
Characterized by having a filter means for preventing production
To do. [0008] Further, the processor unit is configured to execute the signal processing.
To the thinning processing of the thinning means for the signal through the means
Interpolating means for interpolating the signal
It is characterized by the following. A surround signal processing method according to the present invention
The law isSurround signal from encoded signal
2-channel stereo signal and surround sound effect
A rear channel signal to obtain
Center for improving sound localization in the center of stereo signals
Decoder that separates four channel signals of channel signals
Means and four channels output by the decoder means
Signal processing, and the front is almost symmetrical to the listener.
Plays surround sound from a pair of speakers placed
And a processor unit configured to
The unit comprises four channels output by the decoder means
Perform 1/2 decimation on signal sampling
Sampling means and sampled through the sampling means.
Signal for each odd and even sample
Signal processing to perform sound image localization processing and sound field processing with reflection sound addition
Signal processing device having
Hardware equivalent to the surround signal processor
Computer-implemented method that implements
AboveReplay to listeners from a pair of left and right speakers
Surround signal processing method,The deco
By the loading means or the computer,Saraun
From the encoded signal to the two channels
Stereo signal and rear for surround sound effects
Channel signal and the stereo signal of the two channels.
Center channel signal to improve center sound image localization
A decoding step of separating the four channel signals ofPrevious
By the thinning means or the computer,The deco
Sample of the 4-channel signal output by the
Thinning out to perform 1/2 decimation on pulling
Tep,By the signal processing means or the computer
WhatSampled through this decimation step
For each odd and even sample of the signal
A signal processing switch that performs sound image localization processing and sound field processing with the addition of reflected sound.
And a step. [0010] Further, the video / audio reproduction method according to the present invention comprises:
2 channels from the encoded signal of the surround signal
Channel stereo signal and surround sound effects
Rear channel signal for the
A center channel to improve the sound image localization at the center of the signal
Decoder means for separating four channel signals of a channel signal
And a four-channel signal output by the decoder means.
Signal processing the signal to the left and right of the listener
Plays surround sound from a pair of speakers
And a processor unit as described above.
Is a four-channel signal output by the decoder means.
While performing 1/2 decimation on the sampling of the signal
Sampling means and sampling through the thinning means.
The odd-numbered and even-numbered samples
Signal processing that performs sound image localization processing and sound field processing of reflected sound addition
Function equivalent to the surround signal processing device by hardware
Using a computer that realizesRe-display video on display
And a display provided on both sides of the display means.
Video sound that is played back from a pair of speakers
A voice reproduction method,The decoding means or the compilation
By the computerSurround signal is encoded
Two-channel stereo signal from the
Rear channel signal for obtaining the
Improve sound localization in the center of 2-channel stereo signal
4 channel signals of the center channel signal for
A decoding step to release,The thinning means or the core
Depending on the computerOutput by the decoding step
1/2 of the sampled 4-channel signal
A decimation thinning step;The signal processing
By means or the computerThis thinning step
Odd and even for signals sampled through
With sound image localization processing and reflected sound for every few samples
And a signal processing step of performing additional sound field processing.
The sound image is localized at the rear position
You. Also, a method for recording on a recording medium according to the present invention
Is2 from the encoded signal of the surround signal
Rear channel signal for
Centachie to improve sound image localization in the center of the teleo signal
Decoder for separating 4 channel signals of channel signal
Stage and 4 channels output by said decoder means
The signal is processed and the front direction is almost symmetrical to the listener.
And a processor unit, wherein the processor unit
With a program that can be executed by a computer that realizes
Yes,A pair located approximately symmetrically to the listener and located forward
The rear surround signal supplied to the transducer
Surround signal processing pro
In grams,The decoding means or the computer
WhatSurround signal from encoded signal
Decode to separate 4 channel signals of channel signal
Steps andBy the thinning means or the computer
What4 channels output by the decoding step
1/2 decimation for sampling of the channel signal
Performing a thinning step,The signal processing means or the
Depending on the computerSun through this thinning step
Odd and even sums of the sampled signal
The sound image localization processing and the sound field processing of adding the reflected sound
Performing a signal processing step,The surround signal processor
Processing means for processing an audio signal by a processing program;
Recording the audio signal processed by the recording means on a recording medium.
Conversion means for converting to a predetermined format for
Recording the recording signal converted by the conversion means on a recording medium
Executed by a recording device havingTo the recording medium
As a recording method,The processing hand By stepSairan
Process the audio signal by theThe strange
By exchange means,The audio signal processed by the program
Convert to a predetermined format for recording on a recording medium
AndBy the recording means,The converted recording signal
The information is recorded on the recording medium. A recording apparatus for recording on a recording medium according to the present invention.
Performing a signal processing step, and a recording apparatus for recording on a recording medium.
As the sound by the surround signal processing program
Processing means for processing a signal, and sound processed by the processing means
Predetermined format for recording voice signals on recording media
Conversion means for converting the data into a record, and the record converted by the conversion means.
Recording means for recording a signal on the recording medium
It is characterized by the following. Further, the recording medium according to the present invention comprises:Saraun
Decoder means for separating the four channel signals of
The four-channel signal output by the coder is processed by a signal processor.
And placed at the front position that is almost symmetrical to the listener
Surround sound is now played from a pair of speakers
A processor unit, wherein the processor unit is
Sampler of 4-channel signal output by the
Thinning means for performing 1/2 decimation on
The signal sampled through this thinning means
The sound image localization process is performed for each of the odd and even samples.
And signal processing means for performing sound field processing of adding reflected sound.
Surround signal processing device or software
A core that realizes the same function as the surround signal processing device
A method implemented by a computer,
On the other hand, a speaker that reproduces from the pair of left and right speakers
The round signal processing method is performed by the surround signal processing device or
Indicates a program to be executed by the computer.
A recorded recording medium, wherein the decoding means or the
The surround signal is encoded by the computer.
From the processed signal to a two-channel stereo signal
The rear channel signal for the sound effect
Improve sound image localization at the center of 2-channel stereo signal
4 channel signal of the center channel signal for
A decoding step of separating, the thinning-out means or the
Output by the computer through the decoding step.
1/1 for sampling of input 4-channel signal
A thinning step for performing two decimations;
This thinning-out step is performed by a computer or the computer.
Odd-numbered for the signal sampled through the
Sound image localization processing and reflected sound for each even-numbered sample
Signal processing step for performing additional sound field processing.
A program for executing the round signal processing method is recorded.
RecordedThings. Transmission of a processing program according to the present invention
The method includes the steps of providing a communication line or network from the program supply means.
To process the surround signal supplied via the
Transmission of processing program to transmit processing program
In the method, the processing program comprises:Surround signal
Is a 2-channel stereo signal from the encoded signal.
Signal and rear channel for surround sound effects
Channel signal and the center of the two-channel stereo signal.
4 channels of center channel signal to improve sound image localization
Decoder means for separating the channel signal;
Processing the four-channel signal output by the means
A pair of speakers arranged in a substantially symmetrical front position with respect to the listener
A processor that reproduces surround sound from speakers
And a processor unit, wherein the processor unit includes the decoder unit.
For sampling the 4-channel signal output by the stage
On the other hand, a decimation unit that performs 1/2 decimation,
Odd number for the signal sampled through the
For each of the eye and even-numbered samples,
Signal processing means for performing sound field processing for adding a shooting sound
The signal is processed by a round signal processor or software.
A computer that achieves the same function as a round signal processor
Is a program that can be executed byFor listeners
A pair of transducers located approximately symmetrically and forward
Processing steps to localize the rear surround signal supplied to the
A processing program that includesThe decoding means
Or by the computer,Surround signal
2-channel stereo from encoded signal
Rear channel for signal and surround sound effects
Signal and the central sound of the two-channel stereo signal
4 channels of center channel signal to improve image localization
A decoding step of separating the channel signal;The thinning
By means or the computerThe decoding station
Sampling of 4-channel signal output by
Thinning step to perform 1/2 decimation on
When,By the signal processing means or the computer,
The signal sampled through this decimation step
On the other hand, the sound image is defined for each of the odd and even samples.
Signal processing step for performing the sound field processing of the position processing and the reflection sound
AndBy adding a header to the processing program,
Conversion to convert to digital signal sequence for line or network
Means and a communication line or network Communication with the partner station
Signal protocol and execute the digital signal sequence.
A transmission device having transmission means for transmitting, or software
Computer that realizes the same function as the above-mentioned transmission device
Executed by the computerTransmission method of the processing program
AsBy the conversion means or the computer,
By attaching a header to the processing program, a communication line or network
Converting to a digital signal sequence for the network;Previous
By the transmission means or the computer,Communication line or
Executes communication protocol with partner station via network
And transmitting the digital signal sequence.
Which is characterized by having [0015] Further, receiving the processing program according to the present invention.
To process the surround signal supplied through the
Receiving a processing program for receiving a processing program
In the communication method, the processing program comprises:Surround sound
From the encoded signal.
Leo signal and rear channel for surround sound effect
4 of the center channel signal to improve the sound image localization of
Decoder means for separating channel signals;
Signal processing of the four-channel signal output by the
Pair located at the front position that is substantially symmetrical to the listener
Pro that reproduces surround sound from speakers
A processor, wherein the processor comprises the decoder
Of the four-channel signal output by the means
Odd number for signals sampled through decimation means
The sound image localization process for each
Signal processing means for performing sound field processing for adding a reflected sound.
Round signal processing device, or by software
A computer that achieves the same function as a surround signal processor.
A program that can be executed byTo the listener
And a pair of transducers located symmetrically forward
Processing to localize the rear surround signal supplied to the
A processing program including steps,The decoding hand
By steps or the computerSurround signal is
2-channel stereo signal from the encoded signal
No. and rear channel for surround sound effects
Signal and the central sound image of the two-channel stereo signal
4 channels of center channel signal to improve localization
A decoding step of separating the channel signal;The thinning out
By steps or the computerThe decode step
For sampling the 4-channel signal output by the
A thinning-out step of performing 1/2 decimation on the
By the signal processing means or the computer,this
For signals sampled through a decimation step
And a signal processing step for performing sound field processing for adding a reflected sound.
IncludingCommunicate with partner station via communication line or network
Execute the protocol and receive the digital signal sequence.
Receiving means for communicating with the Header attached to gram
Remove digital signal for communication line or network
Conversion means for converting a sequence into original data
Or a device equivalent to the receiver by software
Performed by a computer that implements functionsThe processing
As a program receiving method,The receiving means or the controller
By pewterVia communication line or network
Execute the communication protocol with the partner station and
Receiving a signal sequence;The conversion means or the
By computerF attached to the program
Digital for communication lines or networks
Converting the signal sequence into the original data.
It is characterized by the following. Also, a method for transmitting recording data according to the present invention
Is a communication line or network from the recording data supply means.
Based on the predetermined recording data supplied via
In the method of transmitting recorded data for causing
The recorded data isSurround signal is encoded
2 channel stereo signal and surround sound
A rear channel signal for obtaining a sound effect,
To improve the localization of the sound image in the center of the channel stereo signal
Surround signal processing device having signal processing means;
Is connected to the surround signal processing device by software.
A computer executable program that achieves the same function.
ProgramNearly symmetrical to the listener and forward
Rear supply to a pair of transducers located at
A processing program that includes a processing step to localize the round signal.
Recording data recorded by a gram,
In the program,The decoding means or the computer
By the saidSurround signal is encoded
A decoding step;The thinning means or the computer
Depending on the dataOutput by the decoding step
1/2 decimation for 4-channel signal sampling
Thinning step to perform theThe signal processing means or
By the computerThrough this thinning step
Odd-numbered and even-numbered
Sound localization processing and reflection sound addition for each sample
Signal processing step for performing field processing,The processing professional
A header for the communication line or network.
Conversion to digital signal train Exchange means and a communication line or network
Execute communication protocol with partner station via network
And transmission means for transmitting the digital signal sequence.
Transmission device, or the transmission device by software
Executed by computer that realizes the same function as
As a transmission method of recording data,The conversion means or the
Depending on the computerAttaching a header to the recording data
Convert to digital signal train for communication line or network
StepsBy the transmission means or the computer
WhatCommunicate with partner station via communication line or network
Executes the digital signal sequence while executing the protocol.
And sending the same.
You. Also, a recording data receiving method according to the present invention.
The predetermined recording data is supplied via the
Recording to perform surround playback based on fixed recording data
Recording data receiving method,Surround signal is
2-channel stereo signal from the processed signal
And rear channel signal to obtain surround sound effects
Signal and the center of the two-channel stereo signal
4 channels of center channel signal to improve
Decoder means for separating the decoder signal, and the decoder means
Process the 4-channel signal output from the
A pair of speakers arranged at a front position that is substantially symmetrical with respect to
Processor that reproduces surround sound from power
Wherein the processor unit is provided by the decoder unit.
1 for the sampling of the output 4-channel signal
/ 2 decimation thinning means and thinning means
Odd and even for signals sampled through stages
Surround having signal processing means for performing additional sound field processing
The signal processing device or the software
Computer that realizes the same functions as
A more executable program, saidFor listeners
For a pair of transducers located approximately symmetrically forward
Processing step to localize the supplied rear surround signal
Data recorded by a processing program that includes
Then, in the processing program,The decoding means or
With the computer,Surround signal is encoded
Two-channel stereo signal from the processed signal,
Rear channel signal for surround sound effects
And the sound image localization at the center of the two-channel stereo signal
A decoding step for separating the signal;The thinning means or
By the computerIn the decoding step
For sampling of the 4-channel signal output from
Thinning step of performing 1/2 decimation bySaid
By signal processing means or the computer,This thinning
Odd number for the signal sampled through the step
A signal processing step of performing a sound field processing of adding a reflected sound.
SeeCommunication with the partner station via a communication line or network
Execute digital protocol Receive a signal sequence
Receiving means, and a header attached to the digital signal sequence.
Digital signal sequence for communication lines or networks removed
Conversion means for converting the data into original data
Performed by a computer that implements functionsRecord data
As a receiving method ofThe receiving means or the computer
ByWith partner station via communication line or network
Executing the communication protocol and the digital signal sequence
Receiving theThe conversion means or the computer
Depending on the dataRemove the header attached to the record data
Digital signal sequence for communication lines or networks
Converting the original data into original data.
It is assumed that. [0018] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A description will be given based on the form. <First Embodiment> FIG. 1 shows a first embodiment of the present invention.
Surround signal realizing the surround signal processing method according to the present invention
Performs a surround signal processing of a predetermined method as a signal processing device.
It is a block diagram of the circuit to show. In FIG.
Source to play such as video movie software, surround
A signal obtained by encoding the signal is recorded. 2 is sa
Indicates a round signal processor, and surround signals are encoded.
From the loaded signal, two-channel stereo signals L and R
And surround signals to obtain surround sound effects
(Rear channel signal) S and the two-channel signal
4-channel signal of channel signal C and 100 Hz or less
Method as a decoder means for separating low-frequency signals from the signal
Output from the surround signal decoder unit 3 and the decoder unit 3.
Process the input 4 channel signal to the listener
And a pair of speakers 5L arranged at substantially symmetrical front positions
And 2R to reproduce surround sound from 5R
And a processor unit 4. Note that the low-frequency signal
The signal is played on a super woofer or distributed to each channel.
However, in this embodiment, the description is easy to understand.
This low-frequency signal is omitted for the sake of clarity. The processor unit 4 is provided with the decoder unit 3
Rear salau based on the four channel signal output from
Image localization processing for generating predetermined signals SL and SR
Processing unit 6 and the center channel output from the decoder unit 3.
Signal C into two-channel stereo signals L and R
Adders 7a and 7b for performing the addition and addition,
7b output from the sound image localization processing unit 6
A pair of signals obtained by adding the round signals SL and SR respectively
Adder 7c that outputs to speakers 5L and 5R of
And 7d. Here, signal processing by the sound image localization processing unit 6
When the algorithm is rewritten with the circuit configuration, the configuration shown in FIG.
Becomes That is, as shown in FIG.
Reference numeral 6 denotes two channels output from the decoder unit 3
Of the stereo signals L and R and the center channel signal C
Output from the adder 10a and the output from the decoder unit 3.
The sampling with the input surround signal S
Low-pass filters (LPF) 11a and 11b, respectively
１ ／ alternately for each odd-numbered and even-numbered sample
Decimation processing circuits 12a and 12b for performing decimation
And output through the thinning processing circuits 12a and 12b.
Initial reflection sound addition to add the initial reflection sound to each
Devices 13a and 13b and thinning processing circuits 12a and 1
2b to the output added by the adder 10b
And a reverberation adding device 13c for adding reverberation.
You. Further, the initial reflected sound adding devices 13a and 13a
Adder 1 for adding the output of the reverberation sound adding device 13c with the output of the reverberation sound adding device 13c
0c and the addition output of the adder 10b.
Output image obtained through the adder 10d
Sound image localization filter 14 for performing localization processing, with initial reflected sound
Outputs of Adders 13a and 13b and Sound Image Localization Filter
14 and an adder 10e for adding the outputs via
And 10f, and via adders 10e, 10f and 10c.
Decimation of signals from thinning processing circuits 12a and 12b
Interpolation circuit 15 for interpolating signal thinning due to processing
a to 15c and two channels output from the decoder unit 3.
Output from the decoder unit 3 to the stereo signals L and R
Low pass filter (LPF) for surround signal S
11e to the adder 10g
Output and the low-pass filters 11c and 11d
And the outputs of the interpolation circuits 15a and 15b via
It has adders 10h and 10i. The sound image localization filter 14 is
Japanese Patent Application No. 7-161583 already proposed by the inventors and
As in Japanese Patent Application No. 7-28665, a pair of surround signals
Signal processing to make the signals uncorrelated to each other,
An FIR filter 14a in which transfer characteristics P and N are set;
14b and an FIR filter 14 via a delay circuit 14c.
a and the difference signal between the output of the FIR filter 14b and
Pseudo-similar signal having adders 14d and 14e for obtaining a sum signal
Teleo sound image localization filter 14-1 (see FIG. 3A)
), The surround signal is pseudo-two stereo
The sound image is localized to the signal. Here, the transfer characteristics P,
N is set by the following equation. P = (F + K) / (S + A) N = (F−K) / (S−A) (However, S is the ear on the same side of the listener from a pair of speakers.
Transfer function, A is the opposite of the listener from a pair of speakers
Is the transfer function to the ear on the side, where P is the position where you want to localize the sound image
Transfer function from the ear to the listener's ear on the same side, K localizes the sound image
Transfer function from the desired position to the opposite ear of the listener) Here, the sound image localization filter 14 is
Japanese Patent Application No. 5-34371 already proposed by the present inventors.
The surround signal is
An FIR filter 14b for localization in opposite phase;
It has an extension circuit 14c, an adder 14f and an inverter 14g.
Anti-localization sound image localization filter 14-2 ((b) in FIG. 3)
Reference). In FIG. 2, a low-pass filter (LP
F) 11a to 11e, as shown in FIG.
The extension circuit 16, the multiplier 17, and the adder 18 are constituent elements.
Second-order IIR filter and FIR filter 14a
And 14b are delay circuits 1 and 2 as shown in FIG.
6, a multiplier 17 and an adder 18 as components.
The data coefficients Hl and Hr are set by the following equations. Hl = (SF-AK) / (STwo-ATwo) Hr = (SK−AF) / (STwo-ATwo) As described above, according to the first embodiment,
The round signal processor is a pair of left and right speakers for the listener.
Surround signal processing method for playback from
And if the surround signal is an encoded signal
2 channel stereo signal and surround sound effect
Channel signal to obtain the two channels
To improve the sound localization in the center of the stereo signal
Decoder that separates four channel signals
Output step and the decoding step
And the thinning step
Odd and even for signals sampled via
Sound image localization processing and reflection sound addition for each sample
Signal processing step of performing sound field processing of
That implements the signal processing method
Encoding the surround track of
When playing back video software at home, the surround signal S
Perform sound image localization with the two front speakers according to the fixed method
The center channel signal C is applied to the L and R channels.
And the surround signal S is originally monaural.
Because it is a signal, the sound image is localized in the head as it is,
Adds processing to reduce the right correlation and pseudo-stereo signal.
I have. Therefore, the virtual sound image localization processing by the predetermined method is performed.
The listener by the synergistic effect of the process of reducing the correlation between
Can produce a natural surround sound field that wraps around
You. The sampling frequency is 44.1 kHz.
z, but the surround signal is banded at 7 kHz according to the standard.
The frequency is limited to less than half
Use several bands. So I added another feature
And perform 1/2 decimation, and use the remaining time to reflect sound.
Processing and reverberation processing, efficient signal
Processing can be performed. In particular, by the thinning processing circuit
By performing 1/2 decimation, real-time
Long tap length of FIR filter shown in (b)
Since the calculation of the filter only needs to be performed once every two samples,
The SP load is also reduced. In addition, reflected sound is added to the remaining processing
And efficient processing that can be applied to the processing of adding reverberation
And FIR filter with even samples
Different processing such as ring processing, sound field processing with odd samples
Signal processing can be performed. 1 by thinning processing circuit
/ 2 decimation thinning circuit and its interpolation
Insert a low-pass filter before and after the interpolation circuit that performs processing
Thus, generation of aliasing noise can be prevented. <Second Embodiment> By the way, recently,
-Personal computer (hereinafter referred to as PC or personal computer)
Video) has rapidly progressed to multimedia.
It is widespread that PCs handle sounds and voices. Second implementation
In the embodiment, the surround signal processing method described above is implemented.
FIG. 5 shows a case where the present invention is implemented by a personal computer.
This will be described with reference to the drawing. As shown in FIG.
Via drive 21 or internet terminal 22
Surround signal processing program and surround source
PC 23 supplied with MMX
P55C Extended Instruction Set: Application Specific Instruction Set
To improve the efficiency of digital signal processing such as video and audio.
CPU with additional instruction set for better handling)
(Corresponds to the controller) 23a and the
RAM 23b used as a drive and a disk drive
21 or Internet terminal 22
Converter 23c for converting the data to be output
And the signal processing result is forward and backward approximately symmetrical with respect to the listener.
For supplying to speakers 5L and 5R placed in
And an audio interface 23d. Next, the operation in the configuration shown in FIG.
This will be described with reference to the flowchart shown in FIG. FIG.
Surround signal processing program and disk drive 21
DVD on which surround signals of a predetermined format and sound are recorded
With the disc loaded, load the program
(Command) is entered from a keyboard (not shown)
When starting in this state, in step S1,
You can see that it is a program load (command input
Is determined to be a program load). Blog
Read out the RAM data and supply it to the internal RAM of the CPU 23a.
Pay (Step S2) When program loading is completed
To the program load flag (step S
3) End. At this time, the CPU 23a
Therefore, signal processing can be performed at high speed. Next, the disk drive 21
With the disc on which the source is recorded
Ray command is input from a keyboard (not shown).
Start in step S1 and load the program in step S1
You can tell from the flags that the program is set
(NO in step S1), and proceeds to step S4.
To access the first track (special track) on the disc.
To read the subcode indicating the disc type.
Judgment that it is a surround source
In step S5, data is read from the next track.
Decode and send to audio interface 23d
The processing data is set (S6), and the process returns to step S5.
The decoding process is repeated. Audio interface
Ace 23d samples the received data
The D / A conversion is performed periodically to convert the analog signal to an analog signal.
L, 5R. Play if NO in step S4
An inability is displayed (step S7), and the process ends. Here, the decoding in step S5 described above is performed.
The surround signal processing program for
7 is constituted. That is,
In step S31, the surround signal of the predetermined method is encoded.
The decoding process is performed.
Of the 4-channel signal output by the decoding step
Decimation that performs 1/2 decimation on sampling
Process, and in step 33, the thinning
Perform signal processing to perform additional sound field processing, and perform this signal processing.
Substantially left-right symmetric with respect to the listener obtained through step S33
Output position with the sound image localized to
The audio interface shown in FIG.
Output to the switch 23d. A salown having such processing steps
Storage medium such as DVD disk
To record the surround signal from that recording medium.
Easy surround source according to processing program
Signal processing can be enabled, corresponding to a predetermined method
Computer software can be provided. Mentioned above
The surround signal processing program and the surround
If the source is supplied as software,
High-speed signal processing is possible by the corresponding CPU 23a.
Ability. As another example, Sarah
Load signal processing program in the internal RAM of the CPU 23a.
Alternatively, the CPU 2 is provided in advance in the external RAM 23b and
3a can be selected as a program
No. Also, when the video is reproduced on the display means,
A transducer disposed on both sides of the display means
As a surround playback from a pair of speakers as
When playing back video and audio,
Two-channel scan from the encoded signal
Tereo signal and rearch for surround sound effect
Channel signal and the two-channel stereo signal
Center channel signal to improve sound localization
Decode and decode 4 channel signals
For sampling 4-channel signals obtained by processing
A thinning process that performs 1/2 decimation on the
The signal sampled through this decimation process
To perform signal processing to add sound field processing with
This allows the listener to localize the sound image to the rear position.
Wear. That is, as shown in FIG.
A pair of speakers on both sides of the display monitor as a means
Only by providing the powers 5L and 5R, as shown in FIG.
The rear channel signals S and S 'are reproduced from the position and
Speaker from the front without installing a speaker for
Leo signal, stereo signal positioned rearward (surround sound
Rear channel signal to obtain acoustic effect) and stereo
Center channel to improve sound localization in the center of the signal
Three-dimensional salou by the four-channel signal C
Sound can be played. <Third Embodiment> Next, this embodiment will be described.
Now, the processing by the above-mentioned surround signal processing program
Recording method for recording a processed audio signal on a recording medium and recording
The medium will be described. Fig. 9 shows a surround on a DVD disc.
Record the audio signal processed by the
1 is a configuration diagram illustrating a recording device. As shown in FIG.
A signal that has been encoded into a standard surround signal,
Or two-channel stereo signal and surround sound effect
The rear channel signal to obtain the
To improve the sound localization in the center of the stereo signal.
4 channel signals of the input channel are input from IN
Then, A / D conversion is performed through the A / D converter 31 and the signal is transmitted.
Signal processing circuit 32. Where the surround signal
Encoding processing for encoding the
Steps S32 to S shown in FIG.
33 to obtain each output
Then, these outputs are converted by the DVD encoding circuit 34 to D
Convert to VD format. Then, the modulation circuit 35
After modulation, the data is recorded on a DVD disk. The output from the DVD encoding circuit 34
Is packed, and the packing data is output from the output terminal OU.
Output to T1 or modulate with modulation method according to medium
Modulated by the circuit 35 and output to the output terminal OUT2
However, based on the output signal of the output terminal OUT2,
Create a recording medium for the master
To a recording medium (for example, DVD-ROM) for
Can be. In addition, the data supplied from the copyright data supply unit 36 is provided.
Copyright data is packed. Copyright data is
Recorded in the subheader in the user data shown in FIG. 10,
As an example, ・ Information for managing the copy status to identify the copyright
Serial number of the disk that is the report (16 bytes) ・ Player identifier code (4 bytes) ・ Recording date (3 bytes) ・ Number of recordings (3 bytes) ・ Number of copies (4 bytes) and ・ Copyable number for managing copyright status (3 bytes) Are distributed and recorded in the subheader. Also, DVD
Apart from the subheader, it is specified in the CDR disk etc.
On the inner circumference of the disc to correspond to the TOC area
The copyright management information area (CMI area)
These copyright data are recorded in more detail. Also,
Copyright data via output terminal OUT3 if necessary
Output. FIG. 10 shows the DVD encoding circuit 34
Explanatory drawing showing an example of a king data format
The DVD encoding circuit 34, as shown in FIG.
14 bytes for a 4-byte user data packet
Is added. Note that the pack header is
Pack start field and 6 byte SCR
Field, 3-byte Mux rate field, and 1 byte
Is composed of site stuffing fields
You. The DVD disk thus recorded is
Surround output or 2CH output from the playback device shown in FIG.
Power can be selected and reproduced by the user. Shown in FIG.
Thus, the input signal is modulated by the modulation circuit 35 on the encoder side.
Demodulated by the demodulation circuit 37 in accordance with the
The user data is unpacked by the VD decoding circuit 38 and
Data (packet) is restored. This user data is
Digital via switch 45 in the stream state
Output to the output terminal 46 and user data
Bit streams are D / A converters 41a and 41b, respectively.
D / A conversion via the
An analog output terminal 42 connected to the speakers 5L and 5R;
43. Note that, in FIG.
Switch 45 is turned on when the
A decryption unit 44 is provided so that only a specific person can
Stream can be copied. It should be noted that the method of the third embodiment described above and
Is a different method in the signal processing circuit of FIG.
Encoding of surround signals in a fixed format and this encoding
Each output is obtained by 2CH audio processing in S34.
And then output these outputs by DVD encoding circuit 34.
So that it can be converted by the DVD format shown in FIG.
May be. Therefore, according to the above embodiment, FIG.
The signal processing circuit 32 shown in FIG.
A pair of transducers (speed
F) Processing to localize the rear surround signal supplied to
As a surround signal processing program including steps,
Decoding step for separating the four channel signals of the
And the four channels output by the decoding step.
Through the decimation step and through this decimation step
Odd- and even-numbered samples of the sampled signal
Sound field localization processing and reflection sound addition for each sample
Recording on a recording medium, comprising:
As an apparatus and a method, the surround signal processing program
Processing means and steps for processing the audio signal by the system,
The audio signal processed by the processing means and the step is recorded on a recording medium.
Conversion to DVD format for recording on body
Means and steps, and conversion by the conversion means and steps
Recording means for recording the recorded signal on the recording medium; and
Step, the surround signal processing
The audio signal processed by the program
To obtain a DVD disk with the converted signal
Can be. <Fourth Embodiment> Next, this embodiment will be described.
Then, the surround signal processing program as shown in FIG.
Transmission or reception via a communication line / network as
Transmission method and reception method of processing program when transmitting
I will talk about it. In the configuration shown in FIG.
The processing program set and read in the
Communication line (for example, a CATV network)
Or sent to a network (eg the Internet)
The packet is forwarded to another host according to the communication protocol.
It is. When receiving a processing program from another post
, The processing program is packetized by the above communication protocol.
And stores it in the RAM in the CPU 23a.
You. Here, the terminal 22 is shown in FIG.
The configuration shown in FIG. That is, the terminal 22
Receive buffer T1, transmit buffer T2, communication interface
Base adapter T3, data converter T4, controller
T5 and a communication terminal T6, the controller T5 comprises:
By controlling the operation of each component of the terminal 22, FIG.
The flowchart at the time of transfer (transmission) shown in FIG.
This is executed according to the flowchart at the time of reception. That is, at the time of transfer (transmission) shown in FIG.
In the flowchart, as shown in FIG.
A pair of transjugators located almost symmetrically to the front and located in front
The rear surround signal supplied to the speaker (speaker).
Surround signal processing program including processing steps
The surround signal is encoded as a signal
To improve the sound localization in the center of the
Data for separating the four channel signals of the center channel signal
The code step and the decoding step.
1/2 of the sampling of the 4-channel signal
The thinning step for performing the simulation and the thinning step
The round signal processing program (program information) is transmitted
In the data conversion unit T4 via the buffer T2, FIG.
As shown in FIG. 4 (A), a block of a certain size (packet
(Put) P1, P2, P3
Step S41), then a header (destination) is attached
Data is converted or formatted into a
Step S42), an adapter for executing a communication protocol with the partner station
From the communication terminal T6 via the communication line network
(Step S43). The network
The packetized packet shown in FIG.
The information obtained is the optimum information in the configuration of the communication network shown in FIG.
A router R for selecting a route, a packet switch Pn (n =
, K) according to the communication protocol.
Is supplied to the terminal T6 of the partner station. Next, a flowchart shown in FIG.
Thus, the operation on the receiving side will be described. Communication terminal T6 and
The information passed through the adapter T3 is a data transformation.
In the replacement unit T4, as shown in FIG.
Is removed (step S51), and P1, P2, and P3 are
And are restored to the original data (step S5
2), an internal memory (for example, via the reception buffer T1)
The program is stored in the RAM in the CPU 23a shown in FIG.
Is supplied (step S53). Thus, the packet
The converted information is transmitted to the partner station (multiple
Number is also possible), where the original information
Will be restored. Transfer (transmission)
Sent) and used. As another embodiment, the use station (receiving
Bureau) visits the homepage of the data supply bureau (transmitter)
The processing program from the desired items
Quest (accessed via the Internet) and it
To transfer the processing program data to the using station
You can also In this way, the data supply office is unilateral
Not only send to the other, but also
In this case, the communication interface adapter T3
The P / IP protocol suite is used. <Fifth Embodiment> Next, a fifth embodiment will be described.
Now, music (video) software recording by the recording device shown in FIG.
After being supplied as a medium, the communication line / network
Of recorded data when transmitting or receiving
The transmission method and the reception method will be described. Record shown in FIG.
The DVD disk recorded by the device has a playback device shown in FIG.
The recorded data is played back on the
The output of fixed format or 2CH output can be reproduced.
As the recording data, as shown in FIG.
A pair of transducers located approximately symmetrically and located in front
The localization of the rear surround signal supplied to the (speaker)
Signal processing program including processing steps
Whether the surround signal is an encoded signal
Recorded by the signal processing program (program information).
DVD software. As described above, the recording data is a
Recorded by command signal processing program (program information)
The transmission method and the reception method of the DVD software are described in the fourth section.
It is executed in the same manner as in the embodiment. That is, in FIG.
The terminal 22 shown in FIG.
Transmission buffer T1, transmission buffer T2, communication interface
Adapter T3, data converter T4, controller T
5 and a communication terminal T6.
The operation of each component of the terminal 22 is controlled, and FIG.
This is executed according to the flowchart at the time of reception. Flowchart at the time of transfer (transmission) shown in FIG.
A salau having the processing steps shown in FIG.
DVD software as recorded data
In the data conversion unit T4 via the
As shown in (A), a fixed-size block (packet)
Packetized into P1, P2, and P3 (steps
Step S41), and a header (destination)
Step S42), an adapter for executing a communication protocol with the partner station.
It is placed on the NW (step S43). The network
The information obtained is the optimum route in the configuration of the communication network shown in FIG.
A router R for selecting a packet and a packet switch Pn (n =
To transfer the DVD software to
You can also. In this way, the data supply office unilaterally
Not only send, but also after receiving a request
In the case of such an Internet,
TCP / IP to the communication interface adapter T3
Protocols are used. Also, the recording apparatus shown in FIG.
In the Pro Logic encoding process, this encoding
The signals subjected to the load processing are converted into the signals in steps S31 to S31 as shown in FIG.
34, each output is obtained by 2CH audio processing.
Then, these outputs are output by the DVD encoding circuit 34 in FIG.
0 in the DVD format
Is also good. [0050] As described above, according to the present invention,
Wind signal processing apparatus and methodAnd let the method run
Program forAccording to the surround signal
From the input signal, a two-channel stereo signal
A rear channel signal to obtain a round sound effect,
The sound image localization at the center of the 2-channel signal stereo signal
4 channel signal of center channel signal to improve
Decoder means for separating signalsOr a computer with equivalent functions
PewterAnd steps, and the decoder meansOr equivalent
Computer with functionsAnd output by step
Process the four-channel signal to the left
From a pair of speakers placed at the right
And a processor that reproduces the
The processor is output by the decoder.
1/2 decimation for sampling of 4 channel signal
Thinning means orCompiler with equivalent functions
ComputerAnd steps and the thinning meansOr equivalent function
Computer withAnd sampling through steps
The odd and even samples of the signal
A signal that alternately performs sound image localization processing and sound field processing with added reflected sound
Processing means orComputer with equivalent functionsAnd stay
By having a thinning process,
Filter operation to perform sound image localization processing is performed once every two samples
, The load on the DSP is reduced, and
The added processing to the processing of adding reflected sounds and reverberant sounds
And efficient calculations can be performed. Also, even
Filtering on a few samples, sound field on odd samples
Can perform different signal processing such as processing
A pair of spins arranged
Signal processing to reproduce all channels by the manufacturer
Can be efficiently realized using one DSP.
A surround signal processing device can be obtained. Further, the processor section includes the pair of switches.
This allows the left and right pair of surround signals to be uncorrelated
It can be made pseudo-stereo with
Make the speakers and sound image localization position of the teleo arrangement symmetrical.
Thus, the filtering process can be halved. Further, the processor unit is provided for each sample.
By having a filter means to prevent raw,
It is possible to prevent the generation of aliasing noise due to the thinning process.
it can. Further, the processor section includes the signal processing section.
Thinning processing of the thinning means with respect to a signal passed through
Interpolating means for interpolating signal decimation due to
To obtain a clear sound image behind the listener
And a good surround effect can be obtained. Further, the video / audio reproduction method according to the present invention
The video is reproduced on the display means, and the display means
Surround playback from a pair of speakers arranged on both sides
Video and audio playback method,Decoding means
Or by a computer having equivalent functions,Sa
2 channels from the signal whose round signal has been encoded
To obtain the stereo signal of the panel and surround sound effects
Rear channel signal and the two-channel stereo
Decoding step for separating four channel signals of
When,Computers with thinning means or equivalent functions
Therefore,4 channels output by the decoding step
1/2 decimation for sampling of channel signal
Thinning step to performSignal processing means or equivalent
With a capable computer,This thinning step
By using the surround signal processing method of the present invention,
The video is reproduced on the display means, and the display
Surround sound from a pair of speakers placed on both sides of the step
When sound is generated, the sound image is localized to the listener behind.
Can reproduce stereoscopic surround sound. Further, a recording method on a recording medium according to the present invention
And dressPlace, Located approximately symmetrically forward with respect to the listener
Rear surround supplied to a pair of transducers
Surround signal processing including processing steps for localizing the signal
Surround signal processing of the present invention
And processing the surround signal.
Audio signal byBy processing meansprocessing
And process the processed audio signalBy means of conversionRecorded on the recording medium
Converted to a predetermined format for recording and converted
Recording signalBy recording meansI will record it on the recording medium
The surround signal according to the present invention
The audio signal processed by the processing program is recorded on a recording medium.
Surround signal processing program according to the present invention.
The recording medium that records the audio signal processed by the program
Obtainable. Transmission of a processing program according to the present invention
The method and the receiving method are as follows.
Or processing of surround signals supplied through a network
Processing program for transmitting a processing program
In the transmission method of the gram, it is almost symmetrical to the listener.
To a pair of transducers located in front of
The processing program for localizing the rear surround signal
Processing using the surround signal processing method of the present invention described above
Steps are included, and as a transmission method of the processing program,
Conversion means or a computer with equivalent functions.
hand,A communication line or
Steps to convert to digital signal sequence for network
When,By means of transmission means or a computer having equivalent functions
And receiving the processing program.
As a method,Receiving means or computer with equivalent function
Depending on the dataPartner via communication line or network
A communication protocol with the station and the digital signal
Receiving a sequence of numbers;Conversion means or equivalent
By having a computerAttached to the program
Remove the header and remove the data for the communication line or network.
Digital signal sequence to the original data.
Processing through a communication line or network.
Transmission and reception of a physical program. Further, a recording data transmission method according to the present invention
And receiving method, from the recording data supply means to the communication line or
Based on predetermined recording data supplied via a network,
Recording data transmission method to perform surround playback
In the above, recorded by the surround signal processing of the present invention
As a transmission method of recording data,Conversion means or equivalent function
With a computer havingThe recorded data
Digital signal for communication line or network
Converting to a column;Has transmission means or equivalent
Depending on the computerCommunication line or network
Execute the communication protocol with the partner station via
Transmitting the digital signal sequence,
As a method of receiving recording data,By receiving means or equivalent
Computer with the function ofCommunication line or network
Receiving the digital signal sequence together with,Strange
By means of a replacement means or a computer having an equivalent function,
The header attached to the recording data is removed, and the communication
Original data from digital signal sequence for line or network
Converting the recorded data into
Over the communication line or network as software
And can be received.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the overall configuration of a surround signal processing device according to the present invention. FIG. 2 is a block diagram showing a circuit configuration of a signal processing algorithm of a sound image localization processing unit 6 of a predetermined system in FIG. FIG. 3 is a block diagram showing two configuration examples of a sound image localization filter in FIG. 2; FIG. 4 is a block diagram showing the internal configuration of each of a low-pass filter and an FIR filter shown in FIG. 2; FIG. 5 is a configuration diagram in a case where a processing program using the surround signal processing method of the present invention and a transmission method and a reception method of recording data are implemented by a personal computer. FIG. 6 is a flowchart showing an operation in the configuration shown in FIG. 5; FIG. 7 is a flowchart showing processing steps of a surround signal processing method of the present invention. FIG. 8 is an explanatory diagram for explaining a video / audio reproduction method using the surround signal processing method of the present invention. FIG. 9 is a configuration diagram of a recording apparatus illustrating a recording method on a recording medium using the surround signal processing method of the present invention. FIG. 10 is an explanatory diagram showing an example of a data format packed by the DVD encoding circuit of FIG. 9; FIG. 11 is a configuration diagram showing a recording medium reproducing apparatus using the surround signal processing method of the present invention. FIG. 12 is an internal configuration diagram of the terminal of FIG. 5; 13 is a flowchart at the time of transmission (transfer) in FIG. FIG. 14 is an explanatory diagram of packetization of data by the data conversion unit in FIG. 12; FIG. 15 is a configuration diagram illustrating a communication network between a transmission side and a reception side. FIG. 16 is a flowchart at the time of reception in FIG. [Description of Signs] 1 Source 2 Surround signal processing device 3 Surround signal decoder unit (decoder means) of predetermined system 4 2 Speaker processor unit (processor unit) 5L, 5R Speaker 6 Sound image localization processing units 11a to 11e of predetermined system Low pass Filter (LPF) 12a, 12b Thinning-out processing circuit (thinning means) 13a, 13b Initial reflection sound adding device (signal processing means) 13c Reverberation sound adding device 14 Sound image localization filter (signal processing means, filter means) 14-1 Pseudo stereo Sound image localization filter 14-2 Sound image localization filters 15a to 15c for antiphase localization Interpolation circuit (interpolation means) 32 Signal processing circuit 34 DVD encoding circuit 35 Modulation circuit 36 Copyright data supply unit 37 Demodulation circuit 38 DVD decoding circuit 39 Signal processing Circuit T1 Receive buffer T2 Transmit buffer T3 Adapter Data T4 data converting unit T5 controller T6 communication terminal
──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) H04S 3/00 H04S 1/00 H04S 5/02
(57) [Claim 1] A two-channel stereo signal from a signal obtained by encoding a surround signal, a rear channel signal for obtaining a surround sound effect, and a center of the two-channel stereo signal. Decoder means for separating a four-channel signal of a center channel signal for improving sound image localization, and signal processing of the four-channel signal output by the decoder means, and a front position substantially symmetrical with respect to a listener. A processor unit configured to reproduce a surround sound from a pair of speakers disposed in the processor unit, wherein the processor unit performs デ decimation on sampling of a four-channel signal output by the decoder unit, The odd-numbered and even-numbered samples are applied to the signal sampled through the thinning means. Surround signal processing apparatus and a signal processing means for performing a sound field processing of the respective reflected sound adding a sound image localization processing for each pull. 2. The sound processing apparatus according to claim 1, wherein the processor unit is configured to provide a sound image localization filter unit that gives a pair of left and right surround signals reproduced from the pair of speakers to be pseudo-stereo by making them uncorrelated with each other or a pair of left and right surround signals in opposite phases. The surround signal processing apparatus according to claim 1, further comprising any one of sound image localization filter means for reproducing. 3. The surround signal processing device according to claim 1, wherein the processor unit includes a filter unit for preventing generation of aliasing noise due to the thinning processing of the thinning unit for each sample. . 4. The apparatus according to claim 1, wherein said processor has interpolation means for interpolating a signal passed through said signal processing means by thinning out the signal by said thinning-out means. A surround signal processing device according to any one of the preceding claims. 5. The surround signal is encoded.
A decoder unit, the deco - 4 to be more outputted to da means
One that is performed by a computer that realizes the same function
A law, a surround signal processing method to reproduce a pair of left and right speakers relative to the listener, by the decoding means or the computer, from the signal the <br/> surround signal is encoded processed 2 and stereo signal channels, a decoding step of separating the rear channel signal for obtaining the surround sound effect, a 4-channel signal of the center channel signal to improve sound localization in the center of the stereo signal of the two channels, the decimation A thinning step of performing half decimation on sampling of the four-channel signal output by the decoding step by means or the computer, and a signal sampled by the signal processing means or the computer through the thinning step. To On the other hand, a surround signal processing method including a signal processing step of performing a sound image localization process and a sound field process of adding a reflected sound for each of odd-numbered and even-numbered samples. 6. A surround signal is encoded.
A video and audio reproducing method, wherein a video is reproduced on a display means using a computer realizing equivalent functions, and surround reproduction is performed from a pair of speakers disposed on both sides of the display means, Means or a computer, a 2-channel stereo signal from a signal obtained by encoding the surround signal, a rear-channel signal for obtaining a surround sound effect, and a sound image localization at the center of the 2-channel stereo signal. A decoding step of separating a four-channel signal of a center channel signal for improving the resolution, and a thinning step of performing 1/2 decimation on sampling of the four-channel signal output in the decoding step by the thinning means or the computer. When the signal processing hand Or by the computer, and a signal processing step of performing odd and even, respectively the sound image localization processing for each sample of the reflected sound sound field processing additional to the sampled signal through the decimation step, the listener A video / audio reproduction method in which a sound image is localized at a rear position with respect to a video signal. 7. A surround signal is encoded.
Cormorant surround signal processing apparatus and a signal processing unit, and
A surround signal processing program that includes a processing step of localizing a rear surround signal supplied to a pair of transducers positioned substantially symmetrically forward with respect to a listener by the decoding means or the computer. Is a 4-channel signal of a 2-channel stereo signal from the encoded signal, a rear-channel signal for obtaining a surround sound effect, and a center-channel signal for improving sound image localization at the center of the 2-channel stereo signal. a decoding step of separating, by the thinning-out means or the computer, and decimation step of performing 1/2 decimation the sampling of 4-channel signals output by the decoding step, the signal processing means or the computer The motor, and a signal processing step of performing odd and even, respectively the sound image localization processing for each sample of the reflected sound sound field processing additional to the sampled signal through the decimation step, the surround signal processing program Process audio signals
Processing means for processing the audio signal processed by the processing means.
Conversion means for recording the recording signal converted by the conversion means.
Recording means for recording on a recording medium.
As a method of recording on a recording medium, a predetermined signal for processing the audio signal by the processing means by the surround signal processing program and recording the audio signal processed by the program by the conversion means on the recording medium is provided. into a format by the recording means, the recording method of the converted recording signal to the recording medium and recording on the recording medium. 8. A surround signal is encoded.
Separating the 4-channel signals of Sentacha tunnel signal
A surround signal processing program that includes a processing step of localizing a rear surround signal supplied to a pair of transducers positioned substantially symmetrically forward with respect to a listener by the decoding means or the computer. Is a 4-channel signal of a 2-channel stereo signal from the encoded signal, a rear-channel signal for obtaining a surround sound effect, and a center-channel signal for improving sound image localization at the center of the 2-channel stereo signal. a decoding step of separating, by the thinning-out means or the computer, and decimation step of performing 1/2 decimation the sampling of 4-channel signals output by the decoding step, the signal processing means or the computer The motor, and a signal processing step of performing odd and even, respectively the sound image localization processing for each sample of the reflected sound sound field processing additional to the sampled signal through the decimation step, recorded on the recording medium As an apparatus, processing means for processing an audio signal by the surround signal processing program, conversion means for converting the audio signal processed by the processing means into a predetermined format for recording on a recording medium, and conversion by the conversion means Recording means for recording the recording signal recorded on the recording medium. 9. The surround signal is encoded.
The listener, a pair of left and right speakers
A round signal processing device or the computer to execute
Recording medium on which a program for recording is recorded by the decoding means or the computer.
2 channels from the encoded signal of the round signal
Stereo signal and surround sound effects
Rear channel signal and the two channel stereo signal
Decoding step for separating the four-channel signal of the signal
And the computer by the thinning means or the computer.
Support of 4-channel signal output by code step
Step, the signal processing means or the computer
For implementing a surround signal processing method having
Recording medium on which gram is recorded . The transmission method of claim 10 program processing program for transmitting a processing program from the supply means to perform processing of surround signals supplied via the communication line or network, wherein the processing program, the surround signal is encoded punished
Decoder means for separation and output by the decoder means
Process the four-channel signal to the listener
A pair of speakers arranged in a substantially symmetrical front position
It has a processor section that reproduces round sound.
The processor unit outputs the data by the decoder unit.
A thinning means for performing the simulation, and
Signal processing means for performing field processing
The surround signal by the processor or software
It is realized by a computer that realizes the same functions as the processing unit.
A row can program a processing program including processing steps of localizing the rear surround signal supplied to a pair of transducers positioned forward in substantially symmetrical with respect to the listener, by the decoding means or the computer A two-channel stereo signal from a signal obtained by encoding the surround signal, a rear-channel signal for obtaining a surround sound effect, and a sound image localization at the center of the two-channel stereo signal. A decoding step of separating a four-channel signal of a center channel signal, a thinning step of performing 1/2 decimation on sampling of the four-channel signal output in the decoding step by the thinning means or the computer, and the signal processing; Means or front Computer, and a signal processing step of performing odd and even, respectively the sound image localization processing for each sample of the reflected sound sound field processing additional to the sampled signal through the decimation step, header to the program With a communication line or network
Conversion means for converting the signal into a digital signal sequence for the network;
Communication protocol with partner station via communication line or network
And transmit the digital signal train.
Transmission device with transmission means or software
A computer that realizes functions equivalent to those of the transmission device
The processing means for transmitting the processing program, the converting means or the computer attaching a header to the processing program and converting the processing program into a digital signal sequence for a communication line or a network; and the transmitting means or the computer. the transmission method for processing program characterized by including a step of transmitting the digital signal sequence and executes the communication protocol with the opposite station via the communication line or network. 11. A method of receiving program for receiving a processing program to perform processing of surround signals supplied via the communication line or network from a program supply means, the processing program, the surround signal is encoded punished
It is realized by a computer that realizes the same functions as
A row can program a processing program including processing steps of localizing the rear surround signal supplied to a pair of transducers positioned forward in substantially symmetrical with respect to the listener, by the decoding means or the computer A two-channel stereo signal from a signal obtained by encoding a surround signal , a rear-channel signal for obtaining a surround sound effect, and a center-channel signal for improving sound image localization at the center of the two-channel stereo signal. a decoding step of separating the channel signal, by the thinning-out means or the computer, and decimation step of performing 1/2 decimation the sampling of 4-channel signals output by the decoding step, the signal processing means or the competent By chromatography data, and a signal processing step of performing odd and even, respectively the sound image localization processing for each sample of the reflected sound sound field processing additional to the sampled signal through the decimation step, a communication line or network Communication protocol with partner station via
And receiving the digital signal sequence.
Receiving means for extracting a header attached to the program;
Excluded from digital signal train for communication line or network
A receiving device having conversion means for converting the data into original data;
Performs the same function as the above-mentioned receiver by software.
As receiving method of the processing program executed by the current computer, by the receiving means or the computer, the steps of the communication line or via a network to receive the digital signal sequence and executes the communication protocol with the partner station, the Removing the header attached to the program by a converting means or the computer and converting the digital signal sequence for a communication line or a network into original data. 12. A recording data transmission method for performing surround reproduction based on predetermined recording data supplied from a recording data supply unit via a communication line or a network, wherein the recording data is obtained by encoding a surround signal.
Rear channel signal for obtaining a sound effect,
Improve sound localization in the center of a channel stereo signal
Channel signal of the center channel signal for separation
Output from the decoder means and the decoder means.
A was to reproduce the command sound processor unit, before
Thinning means for performing the
Odd and even samples for the sampled signal.
Sound field localization processing and sound field processing of reflection sound addition for each pull
Signal processing device having signal processing means for performing
Surround signal processing by software or software
Executable by computer that realizes the same function as the device
A capacity program, a recording data recorded by the processing program including a processing step of localizing the rear surround signal supplied to a pair of transducers positioned forward in substantially symmetrical with respect to the receiving listener, the The processing program includes a two-channel stereo signal from a signal obtained by encoding the surround signal by the decoding means or the computer, a rear-channel signal for obtaining a surround sound effect, and the two-channel stereo signal. A decoding step of separating a four-channel signal of a center channel signal for improving the localization of a sound image at the center of the signal; and the sampling means for sampling the four-channel signal output by the decimation means by the thinning means or the computer. 2 decimation A sound image localization process and a sound field process for adding a reflected sound to the signal sampled through the thinning step by the signal processing means or the computer for each of odd-numbered and even-numbered samples. and a signal processing step of performing a communication line or network are designated by the header in the processing program
As a method of transmitting the recording data, the converting means or the computer attaches a header to the recording data and converts the recording data into a digital signal sequence for a communication line or a network . , method of transmitting recording data; and a step of transmitting the digital signal sequence and executes the communication protocol with the opposite station via the communication line or network. 13. via a communication line or network from recorded data supply means supplies the predetermined recording data, the receiving method of recording data to perform surround reproduction on the basis of the supplied predetermined recording data, the surround signal Is two channels from the encoded signal
And recording data recorded by a processing program including a processing step of localizing a rear surround signal supplied to a pair of transducers positioned substantially symmetrically forward with respect to the listener. The decoding means or the computer improves a two-channel stereo signal from a signal obtained by encoding a surround signal , a rear channel signal for obtaining a surround sound effect, and a sound image localization at the center of the two-channel stereo signal. decimation step of performing a decoding step of separating the 4-channel signal, by the thinning-out means or the computer, the 1/2 decimation the sampling of 4-channel signals output by the decoding step of the center channel signal for , By the signal processing means or the computer, and a signal processing step of performing odd and even, respectively the sound image localization processing for each sample of the reflected sound sound field processing additional to the sampled signal through the decimation step Communication protocol with a partner station via a communication line or network.
Reception to execute the col and receive the digital signal sequence
Means and a header attached to the digital signal sequence.
As receiving method for recording data to be executed by the current computer, by the receiving means or the computer, and receiving the digital signal sequence with the communication line or via a network to execute a communication protocol with the partner station, said conversion Removing the header attached to the recording data by means or the computer and converting the digital signal sequence for a communication line or a network into original data.
JP13594197A 1996-10-11 1997-05-09 Surround signal processing apparatus and method, video / audio reproduction method, recording method and recording apparatus on recording medium, recording medium, transmission method and reception method of processing program, and transmission method and reception method of recording data Expired - Lifetime JP3498888B2 (en)
JP28935196 1996-10-11
JP8-289351 1996-10-11
JP13594197A JP3498888B2 (en) 1996-10-11 1997-05-09 Surround signal processing apparatus and method, video / audio reproduction method, recording method and recording apparatus on recording medium, recording medium, transmission method and reception method of processing program, and transmission method and reception method of recording data
EP97117186A EP0836365A3 (en) 1996-10-11 1997-10-02 System for processing audio surround signal
US08/947,350 US6122382A (en) 1996-10-11 1997-10-08 System for processing audio surround signal
KR1019970052210A KR100292778B1 (en) 1996-10-11 1997-10-11 System for processing an audio surround signal
CNB981043380A CN1136758C (en) 1997-05-09 1998-01-20 Audio surround signal processing, transmitting, and receiving system, recording device and its method
JPH10174197A JPH10174197A (en) 1998-06-26
JP3498888B2 true JP3498888B2 (en) 2004-02-23
ID=26469664
JP13594197A Expired - Lifetime JP3498888B2 (en) 1996-10-11 1997-05-09 Surround signal processing apparatus and method, video / audio reproduction method, recording method and recording apparatus on recording medium, recording medium, transmission method and reception method of processing program, and transmission method and reception method of recording data
US (1) US6122382A (en)
EP (1) EP0836365A3 (en)
JP (1) JP3498888B2 (en)
JP2001519995A (en) * 1998-02-13 2001-10-23 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Method of processing surround sound reproduction system, audio / visual reproduction system, a surround signal processing unit, and an input surround signal
JP2004507952A (en) * 2000-08-28 2004-03-11 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィＫｏｎｉｎｋｌｉｊｋｅ　Ｐｈｉｌｉｐｓ　Ｅｌｅｃｔｒｏｎｉｃｓ　Ｎ．Ｖ． Voice generation system
WO2007031906A2 (en) * 2005-09-13 2007-03-22 Koninklijke Philips Electronics N.V. A method of and a device for generating 3d sound
DE102014100049A1 (en) * 2014-01-05 2015-07-09 Kronoton Gmbh Method for audio playback in a multi-channel sound system
JPS6454981A (en) * 1987-08-26 1989-03-02 Canon Kk Digital signal recording and reproducing device
JPH02260932A (en) * 1989-03-31 1990-10-23 Sharp Corp Voice multiplex system
JPH03127599A (en) 1989-10-12 1991-05-30 Matsushita Electric Ind Co Ltd Sound field variable device
JP2944424B2 (en) * 1994-06-16 1999-09-06 三洋電機株式会社 Sound reproduction circuit
JP3547813B2 (en) * 1994-10-31 2004-07-28 パイオニア株式会社 Sound field generator
JP2985704B2 (en) * 1995-01-25 1999-12-06 日本ビクター株式会社 Surround signal processing apparatus
1997-05-09 JP JP13594197A patent/JP3498888B2/en not_active Expired - Lifetime
1997-10-02 EP EP97117186A patent/EP0836365A3/en not_active Withdrawn
1997-10-08 US US08/947,350 patent/US6122382A/en not_active Expired - Lifetime
US6122382A (en) 2000-09-19
JPH10174197A (en) 1998-06-26
KR19980032760A (en) 1998-07-25
EP0836365A3 (en) 2003-01-22
EP0836365A2 (en) 1998-04-15
EP0553832B1 (en) 1998-07-08 Sound field controller
JP2011232766A (en) 2011-11-17 System and method for providing interactive audio in multi-channel audio environment
US20050271213A1 (en) 2005-12-08 Apparatus and method of reproducing wide stereo sound
JP2004529515A (en) 2004-09-24 Method for decoding two-channel matrix coded audio to reconstruct multi-channel audio
JP3555149B2 (en) 2004-08-18 Audio signal encoding method and apparatus, recording medium, audio signal decoding method and apparatus,
JPH0970094A (en) 1997-03-11 Headphone device
JPH09500252A (en) 1997-01-07 Compression method and apparatus, transmission method, the method of decompression multichannel compressed audio signal and apparatus, and a multi-channel compressed audio signal recording medium
2017-05-09 EXPY Cancellation because of completion of term