CN201984809U - Bluetooth wideband speech processing device - Google Patents
Bluetooth wideband speech processing device Download PDFInfo
- Publication number
- CN201984809U CN201984809U CN2011200192713U CN201120019271U CN201984809U CN 201984809 U CN201984809 U CN 201984809U CN 2011200192713 U CN2011200192713 U CN 2011200192713U CN 201120019271 U CN201120019271 U CN 201120019271U CN 201984809 U CN201984809 U CN 201984809U
- Authority
- CN
- China
- Prior art keywords
- unit
- voice
- bluetooth
- utility
- model
- 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.)
- Expired - Lifetime
Links
Images
Abstract
The utility model provides a Bluetooth wideband speech processing device, which comprises a speech sampling unit, an A/D (analog to digital) converting unit, a digital signal processor, a D/A (digital to analog) converting unit, a radio-frequency emission unit and a radio-frequency receiving unit, wherein the speech sampling unit with a 16kHz sampling rate is connected with the digital signal processor through the A/D converting unit; and the digital signal processor is internally provided with an adaptive differential pulse code modulation compiler. Due to the utilization of the Bluetooth wideband speech processing device provided by the utility model, on the premise that the power consumption of a Bluetooth device is not increased, richer speech messages can be obtained, and the speech quality is improved.
Description
Technical field
The utility model relates to the blue tooth voice technical field, more specifically, relates to a kind of bluetooth broadband voice treating apparatus.
Background technology
Along with the progress of society and the development of technology, bluetooth as the open-standards of wireless data and voice transfer, because it adopts wave point to replace wire cable to connect, employing wireless modes such as various communication facilitiess, computing machine and terminal device thereof, various digital data system even household electrical appliance can be linked up, has very strong transplantability, and be applicable to multiple occasion, it is low in energy consumption, little to human body harm to add Bluetooth technology, and use simple, realization easily, therefore use more and more widely.
Bluetooth is supported transmission of 64kb/s real-time voice and data transmission, and present blue tooth voice is to adopt 8kHz sampling and Continuously Variable Slope delta modulation (CVSD) voice coding.The CVSD coding is good to handle and is lost and impaired speech sample, even bit error rate reaches 4%, the voice of CVSD coding still can be listened.Lose or reliability during the speech samples that damages in processing just because of CVSD CODEC (Continuously Variable Slope delta modulation coder) is this, therefore begin most to select for use the coder of CVSD CODEC as blue tooth voice.
Before Bluetooth specification 1.2, audio transmission mechanism is directed synchronously (SCO) channel that connects, because the SCO channel only provides limited error detection, error correction, and there is not the data packet retransmission function, therefore, though the blue tooth voice of this employing 8kHz sampling and CVSD voice coding is fair, CVSD remains a kind of reasonable selection.
But after the Bluetooth specification 1.2, audio transmission mechanism has increased expansion SCO channel (eSCO channel) and adaptive frequency hopping (AFH) technology.The eSCO channel can provide bigger elasticity on channel parameter, and allows to retransmit the packet that damages; AFH has increased the anti-jamming capacity of signal, has reduced the VoP of losing or damaging.Therefore, on the basis that the stronger anti-jamming capacity of better data integrity of eSCO channel and AFH has been arranged, just provide may for the voice quality of improving Bluetooth transmission for the scrambler that adopts other.
But because CVSD CODEC is not enough to the compression of voice, can only adopt sampling rate is the blue tooth voice of 8kHz, if with higher sampling rate, such as 16kHz, will increase the quantity of information that radio frequency sends, take a large amount of bluetooth bandwidth, increase the transmission power consumption of bluetooth equipment.
Therefore, need a kind of solution that under the prerequisite that does not increase bluetooth equipment transmission power consumption, improves voice quality.
The utility model content
In view of the above problems, the purpose of this utility model provides the bluetooth broadband voice treating apparatus that a kind of employing adaptive difference pulse code modulation (ADPCM) CODEC and 16kHz sampling rate provide more high-quality bluetooth broadband voice.
According to an aspect of the present utility model, a kind of bluetooth broadband voice treating apparatus is provided, comprise speech sample unit, A/D converting unit, digital signal processor, D/A converting unit, rf transmitter unit and rf receiver unit, described speech sample unit links to each other with described digital signal processor by described A/D converting unit; Wherein:
Described speech sample unit is the speech sample unit of 16kHz sampling rate;
Be provided with adaptive difference pulse code modulation compiler in the described digital signal processor.
In addition, preferably scheme is, also is provided with transferring voice compression unit and transferring voice decompression unit in described adaptive difference pulse code modulation compiler, and described transferring voice compression unit is connected with described rf transmitter unit; Described transferring voice decompression unit is connected with described rf receiver unit.
In addition, preferred scheme is, also be provided with transferring voice compression unit and transferring voice decompression unit in described digital signal processor, described transferring voice compression unit is connected between described adaptive difference pulse code modulation compiler and the described rf transmitter unit; Described transferring voice decompression unit is connected between described rf receiver unit and the described adaptive difference pulse code modulation compiler.
Moreover preferred scheme is that described default ratio of compression is 4: 1.
Utilize above-mentionedly, can under the prerequisite that does not increase bluetooth equipment transmission power consumption, obtain abundanter voice messaging, the raising voice quality according to bluetooth broadband voice treating apparatus of the present utility model.
In order to realize above-mentioned and relevant purpose, one or more aspects of the present utility model comprise the feature that the back will describe in detail and particularly point out in the claims.Following explanation and accompanying drawing describe some illustrative aspects of the present utility model in detail.Yet, the indication of these aspects only be some modes that can use in the variety of way of principle of the present utility model.In addition, the utility model is intended to comprise all these aspects and their equivalent.
Description of drawings
By the content of reference below in conjunction with the description of the drawings and claims, and along with understanding more comprehensively of the present utility model, other purpose of the present utility model and result will understand and easy to understand more.
In the accompanying drawings:
Fig. 1 shows the logical organization block diagram according to bluetooth broadband voice treating apparatus of the present utility model;
Fig. 2 shows the logical organization block diagram according to another embodiment of bluetooth broadband voice treating apparatus of the present utility model;
Fig. 3 shows the working method synoptic diagram according to bluetooth broadband voice treating apparatus of the present utility model.
Identical label is indicated similar or corresponding feature or function in institute's drawings attached.
Embodiment
Below with reference to accompanying drawing specific embodiment of the utility model is described in detail.
In theory, in the scope that the resolution of people's ear can be accepted, sample frequency is high more, and the quality of sound is also just good more.Therefore, the utility model provides a kind of blue tooth voice treating apparatus of 16kHz sampling rate.
Need to prove, general blue tooth voice sampling rate is 8kHz, be called bluetooth arrowband (narrowband) voice, and the blue tooth voice of 16kHz sampling rate is referred to as bluetooth broadband (wide band) voice, and therefore blue tooth voice treating apparatus of the present utility model also can be called bluetooth broadband voice treating apparatus.
Fig. 1 shows the logical organization block diagram according to bluetooth broadband voice treating apparatus of the present utility model.
As shown in Figure 1, the blue tooth voice treating apparatus 100 that the utility model provides comprises 16kHz speech sample unit 110, A/D converter (A/D converting unit) 120, digital signal processor (DSP) 130, D/A switch unit (D/A converting unit) 140, rf transmitter unit 150 and rf receiver unit 160, wherein, DSP is the digital signal processor that Bluetooth chip carries, comprising adaptive difference pulse code modulation (ADPCM) compiler (CODEC) 131, send for radio frequency in order to audio digital signals is carried out the ADPCM coding, perhaps the audio digital signals that radio frequency is received is decoded and is answered for the user.
Wherein, 16kHz speech sample unit 110 is used for obtaining with the sampling rate of 16kHz the voice messaging of microphone; A/D converting unit 120 is connected between 16kHz speech sample unit 110 and the ADPCMCODEC131, is digital signal in order to voice messaging that 16kHz speech sample unit 110 is obtained from analog signal conversion, offer the DSP130 that Bluetooth chip carries, carry out the coding of ADPCM by 131 pairs of voice of the ADPCM compiler among the DSP130, be compiled as the form that is suitable for radio-frequency transmissions, send encoded voice signal by rf transmitter unit 150 then.
Equally, voice signal through rf receiver unit 160 receptions, want to carry out the decoding (decoding) of ADPCM by the voice of the 131 pairs of radio frequency forms of ADPCM compiler among the DSP130 earlier, could carry out of the conversion of corresponding digital voice signal by D/A converting unit 140, and then give headset user by loudspeaker plays to analog voice signal.
The utility model adopts the sampling rate of 16kHz to obtain the voice messaging of microphone, compares with the 8kHz sampling rate in original speech sample, has just increased the quantity of information of raw tone greatly, lays a good foundation for improving voice quality.Originally adopting the 8kHz sampling, is because the CVSD encoding and decoding are not enough to compress speech, if improve sampling rate, can increase the quantity of information that radio frequency sends, and has taken a large amount of bluetooth bandwidth, increases the power consumption of bluetooth equipment.The utility model adopts the ADPCM encoding and decoding then can overcome above-mentioned defective, under the situation that does not increase transfer rate, improves voice quality.
The encoding and decoding that the digital signal processor (DSP) that blue tooth voice treating apparatus of the present utility model utilizes Bluetooth chip to carry comes voice are carried out ADPCM.Because with respect to CVSD, the sample rate of ADPCM slowly, also can be found the difference between the sample, and correlativity is arranged between the voice signal sample value that microphone is gathered, can predict the amplitude of a back sample value according to preceding several sample values, only need the difference of actual sample value and its predicted value carried out transmitting behind the quantization encoding to get final product therefore at every turn.And because the difference amplitude dynamic range of related voice is much smaller than sample value itself, each difference only need be with coding figure place still less, so the compression of transferring voice also is easy to realization.
After adopting higher sampling rate, can obtain more high-quality voice, but need data quantity transmitted also to increase accordingly; Simultaneously, because bluetooth transmission speed is limited, therefore, in a preferred implementation of the present utility model, adopt default compression recently to transmit.
Fig. 2 shows the logical organization block diagram according to another embodiment of bluetooth broadband voice treating apparatus of the present utility model.As shown in Figure 2, in adaptive difference pulse code modulation compiler 131, also be provided with transferring voice compression unit 1311 and transferring voice decompression unit 1312, wherein transferring voice compression unit 1311 links to each other with rf transmitter unit 150, the voice signal that was used for before radio-frequency transmissions adaptive difference pulse code is modulated compiler 131 codings carries out the compression of transferring voice, to be suitable for the transmission standard of bluetooth bandwidth; 1312 of transferring voice decompression units link to each other with rf receiver unit 160, and the voice signal that is used for after radio frequency receives the adaptive difference pulse code modulation compiler 131 of compression being encoded carries out the decompression of transferring voice.
In the present embodiment, transferring voice compression unit 1311 and transferring voice decompression unit 1312 are integrated in the ADPCM compiler 131, but also do not get rid of they are not arranged on implementation outside the ADPCM compiler 131 separately.
In another embodiment of the present utility model, transferring voice compression unit 1311 and transferring voice decompression unit 1312 are set up in parallel in DSP130 with ADPCM compiler 131, wherein transferring voice compression unit 1311 is connected between ADPCM compiler 131 and the rf transmitter unit 150, and 1312 of transferring voice decompression units are connected between rf receiver unit 160 and the ADPCM compiler 131.
Ratio of compression for transferring voice, in an embodiment of the present utility model, adopt 4bit to come saved differences, the primary voice data of a 16bit (ADC and DAC are 16) can be tapered to 4bit like this, thereby obtain 4: 1 a stable ratio of compression.By this compress mode, the voice signal transfer rate of blue tooth voice treating apparatus provided by the utility model is 64kbps, the same with the transfer rate of CVSD encoding and decoding 64kbps, thus the power consumption of bluetooth equipment can not be increased, reach balance in voice quality and bluetooth bandwidth.
Fig. 3 shows the working method synoptic diagram according to an embodiment of blue tooth voice treating apparatus of the present utility model.
As shown in Figure 3, for the 16kHz sampling rate voice signal of gathering by microphone, through the A/D conversion analog voice signal is converted to audio digital signals earlier, by the ADPCMCODEC among the DSP this audio digital signals ADPCM is encoded to the form that is suitable for the radio frequency transmission then, sends by radio frequency then; For the voice signal that receives by radio frequency, be decoded as the audio digital signals that is suitable for the Bluetooth chip processing by the ADPCM CODEC among the DSP earlier, by the D/A conversion this audio digital signals is converted to analog voice signal then, give the user by loudspeaker plays again.
Statement by above embodiment as can be seen, the blue tooth voice treating apparatus that the utility model provides adopts the higher voice signal of sampling rate acquisition quality that is higher than common 8kHz, and by the ADPCM encoding and decoding, raising is to the ratio of compression of transferring voice, under the prerequisite that does not increase the bluetooth equipment power consumption, high-quality bluetooth broadband voice can be provided, and the voice call quality that bluetooth is connected reaches the speech quality of landline telephone.
In addition, because according to the standard of the long distance communication agreement of CCITT, the general sampled voice frequency that adopts in various countries is 8kHz at present, so adopt the sample frequency of 8kHz can be convenient to exchanging conveniently of system and other communication facilitiess.But because the application of bluetooth generally between two bluetooth equipments, if two equipment are all supported present technique, just can provide high-quality voice; If equipment is not supported present technique, the mode (8kHz sampling rate) that will adopt common blue tooth voice therefore, the utility model in application process and common bluetooth equipment also be compatible.
As above describe according to blue tooth voice treating apparatus of the present utility model in the mode of example with reference to accompanying drawing.But, it will be appreciated by those skilled in the art that the blue tooth voice treating apparatus that proposes for above-mentioned the utility model, can also on the basis that does not break away from the utility model content, make various improvement.Therefore, protection domain of the present utility model should be determined by the content of appending claims.
Claims (4)
1. bluetooth broadband voice treating apparatus, comprise speech sample unit (110), A/D converting unit (120), digital signal processor (130), D/A converting unit (140), rf transmitter unit (150) and rf receiver unit (160), described speech sample unit (110) links to each other with described digital signal processor (130) by described A/D converting unit (120); It is characterized in that:
Described speech sample unit (110) is the speech sample unit of 16kHz sampling rate;
Be provided with adaptive difference pulse code modulation compiler (131) in the described digital signal processor (130).
2. bluetooth broadband voice treating apparatus as claimed in claim 1 is characterized in that, also is provided with transferring voice compression unit (1311) and transferring voice decompression unit (1312) in described adaptive difference pulse code modulation compiler (131),
Described transferring voice compression unit (1311) is connected with described rf transmitter unit (150);
Described transferring voice decompression unit (1312) is connected with described rf receiver unit (160).
3. bluetooth broadband voice treating apparatus as claimed in claim 1 is characterized in that, also is provided with transferring voice compression unit (1311) and transferring voice decompression unit (1312) in described digital signal processor (130),
Described transferring voice compression unit (1311) is connected between described adaptive difference pulse code modulation compiler (131) and the described rf transmitter unit (150);
Described transferring voice decompression unit (1312) is connected between described rf receiver unit (160) and the described adaptive difference pulse code modulation compiler (131).
4. as claim 2 or 3 described bluetooth broadband voice treating apparatus, it is characterized in that,
The ratio of compression of described transferring voice compression unit (1311) is 4: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200192713U CN201984809U (en) | 2011-01-20 | 2011-01-20 | Bluetooth wideband speech processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200192713U CN201984809U (en) | 2011-01-20 | 2011-01-20 | Bluetooth wideband speech processing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201984809U true CN201984809U (en) | 2011-09-21 |
Family
ID=44612265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200192713U Expired - Lifetime CN201984809U (en) | 2011-01-20 | 2011-01-20 | Bluetooth wideband speech processing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201984809U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490801A (en) * | 2013-09-30 | 2014-01-01 | 深圳市新国都技术股份有限公司 | Bluetooth voice communication terminal and Bluetooth communication method |
| CN104092825A (en) * | 2014-07-07 | 2014-10-08 | 深圳市微思客技术有限公司 | Bluetooth voice control method and device and intelligent terminal |
| CN110662205A (en) * | 2018-06-30 | 2020-01-07 | 中移（杭州）信息技术有限公司 | Bluetooth-based audio transmission method, device, medium and equipment |
-
2011
- 2011-01-20 CN CN2011200192713U patent/CN201984809U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490801A (en) * | 2013-09-30 | 2014-01-01 | 深圳市新国都技术股份有限公司 | Bluetooth voice communication terminal and Bluetooth communication method |
| CN103490801B (en) * | 2013-09-30 | 2015-07-29 | 深圳市新国都技术股份有限公司 | A kind of blue tooth voice communication terminal and Bluetooth communication method |
| CN104092825A (en) * | 2014-07-07 | 2014-10-08 | 深圳市微思客技术有限公司 | Bluetooth voice control method and device and intelligent terminal |
| CN110662205A (en) * | 2018-06-30 | 2020-01-07 | 中移（杭州）信息技术有限公司 | Bluetooth-based audio transmission method, device, medium and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1189050C (en) | Voiceband modem for data communications over digital wireless networks | |
| JP4464400B2 (en) | WIRELESS COMMUNICATION TERMINAL AND METHOD FOR COMMUNICATION THROUGH PORTABLE TELEPHONE NETWORK AND EXPANSION MODE BLUETOOTH COMMUNICATION LINK | |
| US8417185B2 (en) | Wireless headset and method for robust voice data communication | |
| US6104991A (en) | Speech encoding and decoding system which modifies encoding and decoding characteristics based on an audio signal | |
| US20080300025A1 (en) | Method and system to configure audio processing paths for voice recognition | |
| US6556965B1 (en) | Wired and cordless telephone systems with extended frequency range | |
| CN112312369A (en) | Low-delay wireless audio transmitting and receiving method and equipment | |
| CN107396211A (en) | Wireless speech transmitting terminal, receiving terminal and system | |
| CN111313984B (en) | Testing device and method for various audio codes of Bluetooth headset | |
| CN201984809U (en) | Bluetooth wideband speech processing device | |
| CN202488441U (en) | Receiver and signal transmission devices in interphone | |
| CN103297115A (en) | Shortwave WAN (wide area network) diversity reception unit and method | |
| RU2009138477A (en) | METHOD FOR DATA TRANSFER IN A COMMUNICATION SYSTEM | |
| CN106506029A (en) | A kind of u piece of digital wireless audio transmission system and its transmission method | |
| WO2024001138A1 (en) | Apparatus and method for transmitting audio data, and electronic device | |
| CN106656274A (en) | Voice transmission system | |
| US20210335370A1 (en) | Wireless Communication Device, and Method and Apparatus for Processing Voice Data | |
| CN105812963B (en) | Relay system and signal conversion method of interphone | |
| JP2008177632A (en) | Radio speech communication circuit | |
| US6144853A (en) | Method and apparatus for digital cordless telephony | |
| CN110149286A (en) | The signal processing method of the raising signal-to-noise ratio of digital communication under additive noise environment | |
| CN112908345A (en) | Voice compression and decompression method for Internet of things | |
| IL132680A (en) | Cellular transmission of physiologic data | |
| CN220964878U (en) | Bluetooth one-to-many broadcasting device | |
| CN202385112U (en) | Wireless broadcast real time monitor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110921 |