CN101609667B - Method for realizing karaoke function in PMP player - Google Patents

Method for realizing karaoke function in PMP player Download PDF

Info

Publication number
CN101609667B
CN101609667B CN200910112224A CN200910112224A CN101609667B CN 101609667 B CN101609667 B CN 101609667B CN 200910112224 A CN200910112224 A CN 200910112224A CN 200910112224 A CN200910112224 A CN 200910112224A CN 101609667 B CN101609667 B CN 101609667B
Authority
CN
China
Prior art keywords
sound
voice
signal
noise reduction
signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN200910112224A
Other languages
Chinese (zh)
Other versions
CN101609667A (en
Inventor
陈长海
方赛鸿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rockchip Electronics Co Ltd
Original Assignee
Fuzhou Rockchip Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuzhou Rockchip Electronics Co Ltd filed Critical Fuzhou Rockchip Electronics Co Ltd
Priority to CN200910112224A priority Critical patent/CN101609667B/en
Publication of CN101609667A publication Critical patent/CN101609667A/en
Application granted granted Critical
Publication of CN101609667B publication Critical patent/CN101609667B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Reverberation, Karaoke And Other Acoustics (AREA)

Abstract

The invention provides a method for realizing the karaoke function in a PMP player, comprising the steps of simultaneously obtaining music background sound and voice reverberation sound and the later step of mixing the music background sound and the voice reverberation sound. The invention has the advantages that the method can not only realize the karaoke function but also provide noise reduction levels; in addition, the method can adopt ordinary sound and video files to generate accompaniment cinctures, render different karaoke scenes for users, thus greatly increasing applicability of the karaoke function.

Description

Realize the method for Kara OK function in the PMP player
[technical field]
The present invention relates to a kind of PMP player system, relate in particular to the method that realizes Kara OK function in a kind of PMP player.
[background technology]
PMP player (Portable Media Player, i.e. " portable electronic device ").Become and use portable electronic product widely,, be easy to carry because its volume is little, characteristics such as music enjoyment anywhere or anytime, the people in the life that become a reality particularly receive liking of a young trend generation.But, only have the paces that music playback function still can not be caught up with modern fast pace life, can not satisfy the initiatively music experience of participatory of people, therefore, the PMP player with Kara OK function also is born thereupon.The Karaoke of this portable makes the user can enjoy the sensation of active participation music whenever and wherever possible, practices phonograph but also can work as, and further improves the performance level of oneself.
But existing PMP player with Kara OK function still has weak point; Accompaniment music must be a file of changing or download special format through exterior PC software; It is convenient anywhere or anytime to bring to the user; Simultaneously, single K song pattern can not let user experiencing different KTV sensations.For the user of Karaoke, what not only need is Kara OK function, and what more need is to experience the enjoyment that different K song pattern is brought.
United States Patent (USP) discloses for 6690799B1 number with voice and has eliminated relevant " the processing stereo signals equipment " of circuit; It is the method that the traditional voice of utilization is eliminated; Promptly when vocal component is positioned at the central passage of sound signal; To eliminate vocal component, obtain simultaneously that the signal of eliminating behind the voice adds low frequency and the radio-frequency component of primary sound and the last background sound that obtains, with the difference between L channel and the R channel when voice is not positioned at the center; Perhaps the responsive frequency band of left and right acoustic channels and people's ear is when to be 200Hz to the signal of 4KHz close, and this signal just output is compared very stiff sound with original sound.
Chinese patent 200610159501.X number, disclose with karaoke OK system in relevant " being used for eliminating the equipment and the method for the vocal component of sound signal ".Its method comprises: postpone a left side and R channel input signal; And the left side that postponed and R channel input signal feedovered to intersect with right and L channel input signal mix; With elimination first vocal component from a left side and R channel input signal, thereby generate a left side and right-channel signals; Postpone a said left side and right-channel signals, and the left side that postponed and right-channel signals feedovered to intersect with right and left channel signals mix, widening sound field, thereby generate second left side and right-channel signals; With to said second a left side and right-channel signals carry out LPF; And the high fdrequency component through the difference between the left side of LPF and right-channel signals and second left side and the right-channel signals of low frequency component mixed with the elimination vocal component, thereby generate a final left side and right-channel signals promptly to generate final accompanying music.But the frequency range of the signal of the final output of this voice removing method has only high fdrequency component to follow low frequency component, and the responsive frequency range of go-between's ear seldom or eliminate having influenced accompaniment band effect, when also existing voice not to be positioned at the center simultaneously, and the unfavorable problem of effect.
Therefore, the voice removing method that relates in above-mentioned two patents can obtain good effect at some audio file, does not have the ubiquity of consideration, and the residual people's of meeting labial was with dental after high-grade voice was eliminated.Simultaneously, the needs that noise reduction grade, reverberation pattern can not satisfy different crowd on the market are not set.
[summary of the invention]
The technical matters that the present invention will solve; Be to provide the method that realizes Kara OK function in a kind of PMP player; Not only can realize Kara OK function, also be provided with the noise reduction grade, and can utilize common audio-video document to produce the accompaniment band; And can play up different K song scenes to the user, increased the usability of Kara OK function greatly.
The present invention is achieved in that the method that realizes Kara OK function in a kind of PMP player; It is characterized in that: the obtaining step and the voice reverberant sound obtaining step that comprise the music background sound that carries out simultaneously; And the mixed step that contracts of music background sound that carries out afterwards and voice reverberant sound, wherein
The obtaining step of said music background sound comprises:
Step 110, obtain the decoded audio stream digital signal of audio-video document in the PMP player;
Step 120, the voice of the decoded audio stream digital signal in the step 110 is eliminated;
Step 130, the decoded audio stream digital signal in the step 110 is carried out former song low-frequency component keep;
The audio stream digital signal that the low frequency of step 140, the audio stream digital signal after the voice of step 120 eliminated and step 130 kept is mixed to contract and is obtained the music background sound;
Said voice reverberant sound obtaining step comprises:
Step 210, obtain user's voice digital audio and video signals through Mike;
Form the voice reverberant sound behind step 220, the voice digital audio and video signals process reverberation digital signal processing algorithm;
The mixed step that contracts of said music background sound and voice reverberant sound is specially:
Step 300, the voice reverberant sound of music background sound in the step 140 and step 220 is mixed the back of contracting form output audio signal.
In the above-mentioned technical scheme,
The obtaining step of said music background sound also comprises after said step 120:
Step 150, obtain final background music after the music background sound strengthened at least a processing that wave filter and labio-dental sound eliminate through low frequency signal.
Said specifically is to carry out the grade noise reduction of left and right sound channels simultaneously in step 120, and wherein, the grade noise reduction of said R channel comprises:
The left channel signals anti-phase of step 121, decoding stereo audio stream signal with 110;
Step 122, the inversion signal in 121 multiply by a noise reduction factor, the value of this noise reduction factor is between 0～1, is worth greatly more, and grade is high more;
Step 123, the R channel addition of 122 sound signals and 110 sound signals is obtained the right-channel signals after the noise reduction;
The grade noise reduction of said L channel comprises:
The right-channel signals anti-phase of step 125, decoding stereo audio stream signal with 110;
Step 126, the inversion signal in 125 multiply by a noise reduction factor, the value of this noise reduction factor is between 0～1, is worth greatly more, and grade is high more;
Step 127, the L channel addition of 126 sound signals and 110 sound signals is obtained the left channel signals after the noise reduction.
In high-grade noise reduction pattern, be with caused dental and labial after the rejection filter elimination noise reduction.
In the said step 210, user people's acoustical signal of obtaining through Mike be through the A/D cell translation become to have with said step 110 in the audio stream digital signal equate people's acoustical signal of sampling rate.
Reverberation in the said step 220 is that the K song pattern in simulation hall, the middle Room, the little Room is carried out reverberation.
Output audio signal in the said step 220 is to do sound and mix the back acquisition of contracting with the ratio of wet sound through being provided with.
The present invention has following advantage: not only can realize Kara OK function; Also be provided with the noise reduction grade; And can utilize common audio-video document to produce accompaniment band (realizing) through step 120 to step 150; And can play up different K song scenes to the user, increased the usability of Kara OK function greatly.
[description of drawings]
Combine embodiment that the present invention is further described with reference to the accompanying drawings.
Fig. 1 is a FB(flow block) of realizing the inventive method.
Fig. 2 is the system chart of the inventive method.
Fig. 3 a and Fig. 3 b are the grade noise reduction steps flow chart block diagrams of realizing the inventive method left and right sound channels.
Fig. 4 is that the inventive method produces accompaniment band implementation structure synoptic diagram.
Fig. 5 is a reverberation modular structure synoptic diagram of realizing the inventive method reverberation step.
[embodiment]
Seeing also shown in Figure 2ly, is the system chart of realizing the inventive method.This system comprises that audio-video document decoder module 1, voice cancellation module 2, low frequency keep module 3, first and mix the sound module 4 that contracts, post-processed module 5, sound collection modular converter 6, reverberation processing module 7 and second and mix the sound module 8 that contracts.Said audio-video document decoder module 1 keeps module 3 through said voice cancellation module 2, low frequency respectively and contracts with said first mixing and be connected to said post-processed module 5 again after sound module 4 is connected; Be connected to said second in the lump with said post-processed module 5 after said sound collection modular converter 6 is connected with said reverberation processing module 7 and mix the sound module 8 that contracts.
As shown in Figure 1; Realize the method for Kara OK function in the PMP player of the present invention; The obtaining step 100 and voice reverberant sound obtaining step 200 that comprise the music background sound that carries out simultaneously; And the mixed step 300 that contracts of music background sound that carries out afterwards and voice reverberant sound, please combine illustrated in figures 1 and 2ly, the obtaining step 100 of said music background sound comprises:
Step 110, obtain the decoded audio stream digital signal of audio-video document in the PMP player, the sound signal of left and right sound channels through said audio-video document decoder module 1.
Step 120, eliminate through the voice of the decoded audio stream digital signal in 2 pairs of steps 110 of said voice cancellation module.
Step 130, the decoded audio stream digital signal that keeps in 3 pairs of steps 110 of module through said low frequency are simultaneously carried out former song low-frequency component reservation.This step is an optional step, under the companion finds pleasure in the situation that is low frequency, needs choosing.It is the signals that the binaural audio signal that said audio-video document decoder module 1 produces kept the low-frequency component in the primary sound through low-pass filter that said low frequency keeps module 3.
Step 140, through said first mix audio stream digital signal and step 130 after the sound module 4 that contracts is eliminated the voice of step 120 the audio stream digital signal that kept of low frequency mix to contract and obtain the music background sound.It mainly is said voice cancellation module 2 to be eliminated binaural signal and said low frequency behind the voice keep module 3 and carry out mixing that the binaural signal of low frequency reservation the carries out corresponding sound channel sound that contracts, and guarantees that mixed signal can not produce saturated overflowing.If under the not high situation of accompaniment background sound quality requirements, said first mix sound module 4 outputs of contracting signal can regard accompaniment tone.If dissatisfied, can further carry out the processing in later stage to existing accompaniment tone.
Step 150, obtain final background music after through post-processed module 5 the music background sound being strengthened at least a processing that wave filter and labio-dental sound eliminate through low frequency signal.The post-processed that said post-processed module 5 is carried out has comprised the low frequency reinforcement and has weakened labio-dental sound and disturb two modules that these two modules can be done any combination, can only carry out wherein arbitrary module, and perhaps two modules are all carried out.According to people's ear apperceive characteristic; Can know that people's ear is relatively responsive to low frequency signal, so low frequency strengthens purpose and is to cover by voice and eliminates the sound signal radio-frequency component loss that causes, after voice is eliminated; Some residual people's of song meeting dental is with labial; Can cause in the accompaniment tone noise with " neighing ", at this moment, the essential interference of noise that reduces.
Said voice reverberant sound obtaining step 200 comprises:
Step 210, obtain user's voice digital audio and video signals through said sound collection modular converter 6 usefulness Mikes, this step be through user people's acoustical signal that Mike obtains be through the A/D cell translation become to have with said step 110 in the audio stream digital signal equate people's acoustical signal (single, double sound channel also can) of sampling rate.
Step 220, through said reverberation processing module 7 with the voice digital audio and video signals through forming the voice reverberant sound behind the reverberation digital signal processing algorithm, the K song is carried out in simulation under different scene.Reverberation in this step is that the K song pattern in simulation hall, the middle Room, the little Room is carried out reverberation, and its output audio signal is to do sound and the ratio of wet sound and mix and export after contracting again through being provided with.
The mixed step 300 that contracts of said music background sound and voice reverberant sound is specially:
Step 300, said second is mixed the sound module 8 that contracts the voice reverberant sound of the music background sound in the step 150 and step 220 is mixed the formation output audio signal afterwards that contracts.
Step 120 described in the inventive method specifically is to carry out the grade noise reduction of left and right sound channels simultaneously; Multiply by the noise reduction factor after its left side (right side) sound channel anti-phase that said audio-video document decoder module 1 is produced through said voice cancellation module 2; Carry out addition with the original right side (left side) sound channel, eliminate the right side (left side) channel audio signal behind the voice by the time:
See also shown in Fig. 3 a, the grade noise reduction of this R channel comprises:
The left channel signals anti-phase of step 121, decoding stereo audio stream signal with 110;
Step 122, the inversion signal in 121 multiply by a noise reduction factor, the value of this noise reduction factor is between 0～1, is worth greatly more, and grade is high more;
Step 123, the R channel addition of 122 sound signals and 110 sound signals is obtained the right-channel signals after the noise reduction;
See also shown in Fig. 3 b, the grade noise reduction of this L channel comprises:
The right-channel signals anti-phase of step 125, decoding stereo audio stream signal with 110;
Step 126, the inversion signal in 125 multiply by a noise reduction factor, the value of this noise reduction factor is between 0～1, is worth greatly more, and grade is high more;
Step 127, the L channel addition of 126 sound signals and 110 sound signals is obtained the left channel signals after the noise reduction.And in high-grade noise reduction pattern, be with caused dental and labial after the rejection filter elimination noise reduction.
See also shown in Figure 4 again; Be that the inventive method produces accompaniment band (being that above-mentioned steps 120 is to step 150) implementation structure synoptic diagram; Among the figure; Plus sige be mix contract, PR is phase inverter, LPF is low-pass filter, LFE is that low frequency is strengthened wave filter, BSF is a rejection filter, wherein frame of broken lines is a post-processed module 5.The method that following specific explanations accompaniment tone produces because of the stereo two-channel that exists, all is identical and produce the disposal route of in the accompaniment tone two sound channels being carried out, and is example with the L channel at this:
Lin is decoded left channel audio signal among the figure, and it is pulsed modulation (PCM) signal.The Lin signal will divide three the tunnel to walk, and one the tunnel is to carry out the low-frequency component that LPF filtering obtains the Lin signal, and one the tunnel is to multiply by noise reduction factor G2 again and R channel is eliminated voice reference signal Lre*G2 is provided through obtaining Lre behind the PR phase inverter, the one tunnel keep straight-through.Then the reference signal Rre*G1 of through connect signal and R channel is mixed to contract obtaining L, low frequency composition signal is being added above-mentioned L obtains the left channel signals L1 of preliminary elimination voice.Again the L1 signal is carried out post-processed, idiographic flow be the L1 signal through the LFE low frequency strengthen wave filter with or the BSP rejection filter get the left channel signals of accompaniment tone to the end.Wherein LFE and BSP are optional.
Fig. 5 is a reverberation modular structure synoptic diagram of realizing the inventive method reverberation step.Among the figure, A is the sound signal of voice, and A1, B1 are the entrance and exit of hall pattern, and A2, B2 are the entrance and exit of middle Room pattern, and A3, B3 are the entrance and exit of little Room pattern, and B is the sound signal after the reverberation.
According to user-selected K song pattern, system can send into people's acoustical signal A the reverberation algorithm of associative mode automatically, specifically can adopt disclosed some reverberation algorithm in the existing document; Like " the reverberation algorithm of a kind of Schroeder " (Ceng Rong; The Master degree candidate of Central China University of Science and Technology academic dissertation, in April, 2003, P21-P26); Under the prerequisite of ensuring the quality of products, select the algorithm of low operand to be easy in the PMP player system, realize.

Claims (7)

1. realize the method for Kara OK function in the PMP player, it is characterized in that: comprise the obtaining step and the voice reverberant sound obtaining step of the music background sound that carries out simultaneously, and the mixed step that contracts of music background sound that carries out afterwards and voice reverberant sound, wherein,
The obtaining step of said music background sound comprises:
Step 110, obtain the decoded audio stream digital signal of audio-video document in the PMP player;
Step 120, the voice of the decoded audio stream digital signal in the step 110 is eliminated;
Step 130, the decoded audio stream digital signal in the step 110 is carried out former song low-frequency component keep;
The audio stream digital signal that the low frequency of step 140, the audio stream digital signal after the voice of step 120 eliminated and step 130 kept is mixed to contract and is obtained the music background sound;
Said voice reverberant sound obtaining step comprises
Step 210, obtain user's voice digital audio and video signals through Mike;
Form the voice reverberant sound behind step 220, the voice digital audio and video signals process reverberation digital signal processing algorithm;
The mixed step that contracts of said music background sound and voice reverberant sound is specially:
Step 300, the voice reverberant sound of music background sound in the step 140 and step 220 is mixed the back of contracting form output audio signal.
2. realize the method for Kara OK function in the PMP player according to claim 1, it is characterized in that: the obtaining step of said music background sound also comprises after said step 140:
Step 150, obtain final background music after the music background sound strengthened at least a processing that wave filter and labio-dental sound eliminate through low frequency signal.
3. realize the method for Kara OK function in the PMP player according to claim 1, it is characterized in that: said specifically is to carry out the grade noise reduction of left and right sound channels simultaneously in step 120, wherein,
The grade noise reduction of said R channel comprises:
The left channel signals anti-phase of step 121, decoding stereo audio stream signal with 110;
Step 122, the inversion signal in 121 multiply by a noise reduction factor, the value of this noise reduction factor is between 0～1, is worth greatly more, and grade is high more;
Step 123, the R channel addition of 122 sound signals and 110 sound signals is obtained the right-channel signals after the noise reduction;
The grade noise reduction of said L channel comprises:
The right-channel signals anti-phase of step 125, decoding stereo audio stream signal with 110;
Step 126, the inversion signal in 125 multiply by a noise reduction factor, the value of this noise reduction factor is between 0～1, is worth greatly more, and grade is high more;
Step 127, the L channel addition of 126 sound signals and 110 sound signals is obtained the left channel signals after the noise reduction.
4. realize the method for Kara OK function in the PMP player according to claim 3, it is characterized in that: in high-grade noise reduction pattern, be with caused dental and labial after the rejection filter elimination noise reduction.
5. realize the method for Kara OK function in the PMP player according to claim 1; It is characterized in that: in the said step 210, user people's acoustical signal of obtaining through Mike be through the A/D cell translation become to have with said step 110 in the audio stream digital signal equate people's acoustical signal of sampling rate.
6. realize the method for Kara OK function in the PMP player according to claim 1, it is characterized in that: the reverberation in the said step 220 is that the K song pattern in simulation hall, the middle Room, the little Room is carried out reverberation.
7. realize the method for Kara OK function in the PMP player according to claim 6, it is characterized in that: the output audio signal in the said step 220 is to do sound and mix the back acquisition of contracting with the ratio of wet sound through being provided with.
CN200910112224A 2009-07-22 2009-07-22 Method for realizing karaoke function in PMP player Active CN101609667B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910112224A CN101609667B (en) 2009-07-22 2009-07-22 Method for realizing karaoke function in PMP player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200910112224A CN101609667B (en) 2009-07-22 2009-07-22 Method for realizing karaoke function in PMP player

Publications (2)

Publication Number Publication Date
CN101609667A CN101609667A (en) 2009-12-23
CN101609667B true CN101609667B (en) 2012-09-05

Family

ID=41483392

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200910112224A Active CN101609667B (en) 2009-07-22 2009-07-22 Method for realizing karaoke function in PMP player

Country Status (1)

Country Link
CN (1) CN101609667B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103915086A (en) * 2013-01-07 2014-07-09 华为技术有限公司 Information processing method, device and system

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012012944A1 (en) * 2010-07-29 2012-02-02 Yang Bangzhao Media player
JP2012252240A (en) * 2011-06-06 2012-12-20 Sony Corp Replay apparatus, signal processing apparatus, and signal processing method
CN104637488B (en) 2013-11-07 2018-12-25 华为终端（东莞）有限公司 The method and terminal device of acoustic processing
CN103886881B (en) * 2014-04-14 2018-10-02 福建凯米网络科技有限公司 A kind of method and its system of extension point library
CN106162417A (en) * 2015-04-15 2016-11-23 徐文波 Audio frequency apparatus
CN106254978B (en) * 2016-11-09 2020-07-31 深圳矽乐科技有限公司 Multifunctional wireless music microphone
CN109905792A (en) * 2017-12-10 2019-06-18 张德明 It is a kind of with go voice function wireless K sing earphone
CN110460924A (en) * 2018-05-08 2019-11-15 张德明 One kind is wired to go voice K to sing earphone
JP7243052B2 (en) * 2018-06-25 2023-03-22 カシオ計算機株式会社 Audio extraction device, audio playback device, audio extraction method, audio playback method, machine learning method and program
CN109887521B (en) * 2019-01-21 2020-11-27 北京小唱科技有限公司 Dynamic master tape processing method and device for audio
CN110139206B (en) * 2019-04-28 2020-11-27 北京雷石天地电子技术有限公司 Stereo audio processing method and system
CN110956969B (en) * 2019-11-28 2022-06-10 北京达佳互联信息技术有限公司 Live broadcast audio processing method and device, electronic equipment and storage medium
CN111064327B (en) * 2019-12-31 2021-06-18 江苏大学 Driving motor optimization method and system based on sound quality
CN111261175A (en) * 2020-01-17 2020-06-09 北京塞宾科技有限公司 Bluetooth audio signal transmission method and device
CN111326132B (en) * 2020-01-22 2021-10-22 北京达佳互联信息技术有限公司 Audio processing method and device, storage medium and electronic equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2078480U (en) * 1990-09-22 1991-06-05 深圳天马微电子公司 Portable liquid crystal displayed karaoke player
CN2132235Y (en) * 1992-06-25 1993-05-05 纵瑞荣 Wine bottle type karaoke
CN1205499A (en) * 1997-07-11 1999-01-20 财团法人工业技术研究院 Interactive musical accompaniment method and equipment
CN1941073A (en) * 2005-09-26 2007-04-04 三星电子株式会社 Apparatus and method of canceling vocal component in an audio signal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2078480U (en) * 1990-09-22 1991-06-05 深圳天马微电子公司 Portable liquid crystal displayed karaoke player
CN2132235Y (en) * 1992-06-25 1993-05-05 纵瑞荣 Wine bottle type karaoke
CN1205499A (en) * 1997-07-11 1999-01-20 财团法人工业技术研究院 Interactive musical accompaniment method and equipment
CN1941073A (en) * 2005-09-26 2007-04-04 三星电子株式会社 Apparatus and method of canceling vocal component in an audio signal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP特开平10-207491A 1998.08.07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103915086A (en) * 2013-01-07 2014-07-09 华为技术有限公司 Information processing method, device and system

Also Published As

Publication number Publication date
CN101609667A (en) 2009-12-23

Similar Documents

Publication Publication Date Title
CN101609667B (en) Method for realizing karaoke function in PMP player
CN1941073B (en) Apparatus and method of canceling vocal component in an audio signal
KR101118922B1 (en) Acoustical virtual reality engine and advanced techniques for enhancing delivered sound
CN100566458C (en) Acoustical signal processing method and device
CN101681663B (en) A device for and a method of processing audio data
CN102024481B (en) Method and device for extracting vibration information from audio file and vibrating device
KR101569032B1 (en) A method and an apparatus of decoding an audio signal
JP6272474B2 (en) Voice processing method and terminal device
CN202871289U (en) Portable karaoke device based on MP3 format
CN101131816B (en) Audio file generation method, device and digital player
US9076452B2 (en) Apparatus and method for generating audio signal having sound enhancement effect
CN101065795A (en) A system and a method of processing audio data, a program element and a computer-readable medium
US20080075292A1 (en) Audio processing apparatus suitable for singing practice
CN104157292B (en) Anti- utter long and high-pitched sounds acoustic signal processing method and device
CN112954581B (en) Audio playing method, system and device
CN203313386U (en) Wireless audio processing equipment, wireless audio player, household karaoke system
US20070297624A1 (en) Digital audio encoding
WO2011087460A1 (en) A method and a device for generating at least one audio file, and a method and a device for playing at least one audio file
CN112866472B (en) Motor control method, control system, control device and chip
JP2007028065A (en) Surround reproducing apparatus
Boren et al. Acoustics of virtually coupled performance spaces
Bhalani et al. Karaoke Machine implementation and validation using Out of Phase Stereo method
JP4435452B2 (en) Signal processing apparatus, signal processing method, program, and recording medium
JP2005141121A (en) Audio reproducing device
CN211181633U (en) Karaoke system with multi-sound-effect reverberation

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C56 Change in the name or address of the patentee
CP03 Change of name, title or address

Address after: 350000 Fuzhou Gulou District, Fujian, software Avenue, building 89, No. 18

Patentee after: FUZHOU ROCKCHIP ELECTRONICS CO., LTD.

Address before: 350000, building 1, building 550, No. 601, industrial road, West Suburbs, Hongshan Town, Gulou District, Fujian, Fuzhou

Patentee before: Fuzhou Rockchip Semiconductor Co., Ltd.

CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 350000 building, No. 89, software Avenue, Gulou District, Fujian, Fuzhou 18, China

Patentee after: Ruixin Microelectronics Co., Ltd

Address before: 350000 building, No. 89, software Avenue, Gulou District, Fujian, Fuzhou 18, China

Patentee before: Fuzhou Rockchips Electronics Co.,Ltd.