CN105869647B - A kind of primary DSD audio-frequency decoding method of smart phone, system and smart phone - Google Patents
A kind of primary DSD audio-frequency decoding method of smart phone, system and smart phone Download PDFInfo
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Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/0017—Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
- G10L19/167—Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72442—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for playing music files
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- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Computational Linguistics (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Telephone Function (AREA)
Abstract
The present invention relates to a kind of primary DSD audio-frequency decoding methods of smart phone, system and smart phone, DSD audio stream is re-grouped package as PCM audio stream on application processor chip, primary DSD audio stream is restored by PCM audio stream by DSD audio decoder chip again, finally primary DSD audio stream is restored by audio decoder chip and is played out as analog music signals, DSD is not during this encodes conversion to pcm encoder, DSD audio stream is only re-grouped package into PCM audio stream, do not lose and change any data information, the quality of music file will not be deteriorated, it greatly ensure that sense of hearing, smart phone is allowed to play primary DSD high quality audio stream, substantive promotion is made on HIFI music playback function for smart phone, also can lead to for masses It crosses smart phone and enjoys ultimate attainment music experience and contribute.
Description
Technical field
The present invention relates to a kind of audio decoding system more particularly to a kind of primary DSD audio-frequency decoding method of smart phone, it is
System and smart phone.
Background technique
DSD is the abbreviation of Direct Stream Digital, indicates direct bit stream digital coding, is SACD (Super
Audio CD) coding mode, be high-resolution digital sound equipment specification, sampled by the way of 1bit bit stream, sample rate
The high sampling mode of 2.8224MHz (64 times of CD 44.1kHz sampling), directly in a pulsed fashion analog music signal waveform
It is changed into digital signal, to be nearly four times in the space of CD, stores music, therefore more outstanding sound effect can be provided,
The dynamic range of its audible frequency domain is about 120dB.Since sampling number is high, therefore the music signal waveform sampled is very smoother, than
It is closer to original analog waveform.Furthermore due to not using multidigit, a conversion program is saved, to reduce because of number filter
Wave and issuable distortion and noise.In addition, due to unlike multidigit system be easy (position be cured higher position more be easy) by power supply or
The influence of external disturbance, therefore quality is more stable, so DSD music is the trend of the following HIFI music.
PCM is the abbreviation of Pulse Code Modulation, is pulse code modulation.Pulse code modulation is that number is logical
One of coding mode of letter, main process are to be sampled the analog signals such as speech, image at regular intervals, keep its discrete
Change, while sample value being quantified by layered units round, sample value is indicated into sampling arteries and veins by one group of binary code
The amplitude of punching is a kind of coded format of present digital audio stream, is widely used in smart phone, TV, audio player etc.
Field.
In recent years, with smart phone functionally with quantitative fast development, smart phone not only office
It is limited to telephony feature, with application of the high-grade audio decoder chip on smart phone, the playing function of HIFI music is
As a critical function of smart phone, the smart phone of HIFI function is carried gradually instead of Portable HIFI
Player.
But since the application processor of smart phone does not support the number of the DSD audio stream of high sampling rate (2.8224MHz)
According to transmission, therefore current smart phone is unable to play primary DSD music.Wherein primary DSD music refers in sound
There is no the format conversion for carrying out DSD to PCM in happy playing process, this format converts the quality variation so that music file, pole
Big influence sense of hearing.
Summary of the invention
In view of this, it is necessary to aiming at the problem that above-mentioned smart phone is unable to play primary DSD music, provide one
The kind primary DSD audio-frequency decoding method of smart phone.
Meanwhile also providing a kind of primary DSD audio decoding system of smart phone and one kind includes primary DSD audio
The smart phone of decoding system.
The primary DSD audio-frequency decoding method of a kind of smart phone provided by the invention, includes the following steps:
S10: DSD audio stream is re-grouped package into PCM audio stream by the application processor chip of smart phone by control, concurrently
Give DSD audio decoder chip；
S20: control by DSD audio decoder chip by the original DSD audio stream of the PCM audio stream re-grouped package also
Original becomes primary DSD audio stream, and is sent to audio decoder chip；
S30: the primary DSD audio stream reduction that control is generated reduction by audio decoder chip becomes analog music signals.
Further, the step S1 specifically:
DSD audio stream again lossless group is bundled into 192kHz sample rate by the application processor chip of smart phone by control
PCM audio stream, be then transferred to DSD audio decoder chip according to the PCM audio stream of 192kHz sample rate.
The primary DSD audio decoding system of a kind of smart phone provided by the invention, comprising: re-group package DSD audio stream
It is reduced at the application processor chip of PCM audio stream, by the original DSD audio stream of the PCM audio stream re-grouped package
The DSD audio decoder chip of primary DSD audio stream and the primary DSD audio stream for generating reduction reduction become analog music
The audio decoder chip of signal；The application processor chip and the DSD audio decoder chip, the DSD audio decoder core
Piece passes through digital audio-frequency data bus with the audio decoder chip and connect.
Further, DSD audio stream again lossless group is bundled into 192kHz sample rate by the application processor chip
Then PCM audio stream is transferred to DSD audio decoder chip according to the PCM audio stream of 192kHz sample rate.
A kind of smart phone provided by the invention, including primary DSD audio decoding system；The primary DSD audio decoder
System includes: that DSD audio stream is re-grouped package into the application processor chip of PCM audio stream, the pcm audio that will be re-grouped package
The original that the original DSD audio stream of stream is reduced into the DSD audio decoder chip of primary DSD audio stream and generates reduction
Raw DSD audio stream reduction becomes the audio decoder chip of analog music signals；The application processor chip and the DSD audio
Decoding chip, the DSD audio decoder chip pass through digital audio-frequency data bus with the audio decoder chip and connect.
Further, DSD audio stream again lossless group is bundled into 192kHz sample rate by the application processor chip
Then PCM audio stream is transferred to DSD audio decoder chip according to the PCM audio stream of 192kHz sample rate.
The primary DSD audio-frequency decoding method of smart phone of the present invention, system and smart phone, will on application processor chip
DSD audio stream is re-grouped package as PCM audio stream, then restores primary DSD by PCM audio stream by DSD audio decoder chip
Primary DSD audio stream is finally restored by audio decoder chip and is played out as analog music signals by audio stream, this process
In be not DSD and encode conversion to pcm encoder, DSD audio stream is only re-grouped package into PCM audio stream, does not lose and changes
Become any data information, the quality of music file will not be deteriorated, greatly ensure that sense of hearing, smart phone be allowed to play original
Raw DSD high quality audio stream is made substantive promotion for smart phone on HIFI music playback function, can also be led to for masses
It crosses smart phone and enjoys ultimate attainment music experience and contribute.
Detailed description of the invention
Fig. 1 is the flow chart of the primary DSD audio-frequency decoding method of smart phone in one embodiment；
Fig. 2 is the structure chart of the primary DSD audio decoding system of smart phone in one embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Fig. 1 is the flow chart of the primary DSD audio-frequency decoding method of smart phone in one embodiment, as shown in Figure 1, this method
Include the following steps:
S10: DSD audio stream is re-grouped package into PCM audio stream by the application processor chip of smart phone by control, concurrently
Give DSD audio decoder chip.
It is so that smart phone can play primary DSD music, the first application of control smart phone in this method
Processor chips re-group package DSD audio stream, re-group package into PCM audio stream, this process be not DSD encode to
(it is to damage conversion that DSD audio stream, which is converted into PCM audio stream, although can directly play audio after conversion for the conversion of pcm encoder
The quality of stream has deterioration), only DSD audio stream is re-grouped package as PCM audio stream, DSD audio stream is re-grouped package into
It is lossless for PCM audio stream, but cannot directly plays, it is necessary to which unpacking again in the way of group packet becomes DSD audio stream
After could play, but it is such conversion be it is lossless, sound quality does not change, and does not lose and change any data information.
Since current mobile phone application processor chip only supports that the voice data stream to 192kHz sample rate is transmitted, and DSD
The sample rate of audio stream is 2.8244MHz, therefore in the step, control is by the application processor chip of smart phone DSD audio
The PCM audio stream that lossless group is bundled into 192kHz sample rate is flowed again, is then transmitted according to the PCM audio stream of 192kHz sample rate
To DSD audio decoder chip.
After sending DSD audio decoder chip for the PCM audio stream re-grouped package, by DSD audio decoder chip into
The original DSD audio stream reduction of the PCM audio stream re-grouped package is become primary DSD audio stream by row processing, thus
To primary DSD audio stream.
S30: the primary DSD audio stream reduction that control is generated reduction by audio decoder chip becomes analog music signals.
After it will restore the primary DSD audio streams to audio decoder chip generated, audio decoder chip will be also primary
At primary DSD audio stream reduction become analog music signals after play out so that smart phone can play it is primary
DSD high quality audio stream.
The primary DSD audio-frequency decoding method of the smart phone, re-groups package into DSD audio stream on application processor chip
For PCM audio stream, then by DSD audio decoder chip primary DSD audio stream is restored by PCM audio stream, finally by audio solution
Primary DSD audio stream is restored and is played out as analog music signals by code chip, be not during this DSD encode to
The conversion of pcm encoder, only re-groups package into PCM audio stream for DSD audio stream, does not lose and change any data information, sound
The quality of music file will not be deteriorated, and greatly ensure that sense of hearing, and smart phone is allowed to play primary DSD high quality audio
Stream is made substantive promotion for smart phone on HIFI music playback function, can also be enjoyed by smart phone for masses
Ultimate attainment music experience contributes.
Meanwhile the present invention also provides a kind of primary DSD audio decoding systems of smart phone, as shown in Fig. 2, the smart phone
Primary DSD audio decoding system includes: that DSD audio stream is re-grouped package into the application processor chip 100 of PCM audio stream, is incited somebody to action
The original DSD audio stream reduction of the PCM audio stream re-grouped package becomes the DSD audio decoder core of primary DSD audio stream
Piece 200 and the primary DSD audio stream for generating reduction reduction become the audio decoder chip 300 of analog music signals.Using
Processor chips 100 and DSD audio decoder chip 200, DSD audio decoder chip 200 and audio decoder chip 300 pass through number
Word audio data bus (I2S) 400 connects.
That is, DSD audio stream is re-grouped package into PCM audio stream and is sent to DSD audio decoder by application processor chip 100
Chip 200.The original DSD audio stream reduction for the PCM audio stream that code set is bundled by DSD audio decoder core 200 becomes original
Audio decoder chip 300 is sent to after raw DSD audio stream.The primary DSD audio stream for again being generated reduction by audio decoder chip 300
Reduction becomes analog music signals.
In this way, DSD audio stream is re-grouped package as PCM audio stream on application processor chip 100, then by DSD sound
Frequency decoding chip 200 restores primary DSD audio stream by PCM audio stream, finally by audio decoder chip 300 by primary DSD
Audio stream reduction is played out as analog music signals, and DSD is not during this and encodes conversion to pcm encoder, only
It is that DSD audio stream is re-grouped package into PCM audio stream, does not lose and change any data information, the quality of music file will not
It is deteriorated, greatly ensure that sense of hearing, smart phone is allowed to play primary DSD high quality audio stream, exist for smart phone
Substantive promotion is made on HIFI music playback function, also can be enjoyed ultimate attainment music experience by smart phone for masses and be done
It contributes out.
The voice data stream transmission supported due to current mobile phone application processor chip 100 to 192kHz sample rate, and
The sample rate of DSD audio stream is 2.8244MHz, therefore application processor chip 100 is bundled into DSD audio stream again lossless group
Then the PCM audio stream of 192kHz sample rate is transferred to DSD audio decoder chip according to the PCM audio stream of 192kHz sample rate
200。
In addition, the present invention also provides a kind of smart phones.The smart phone includes primary DSD audio decoding system, such as
Shown in Fig. 2, primary DSD audio decoding system includes: the application processor core that DSD audio stream is re-grouped package into PCM audio stream
Piece 100, the DSD sound that the original DSD audio stream reduction of the PCM audio stream re-grouped package is become to primary DSD audio stream
Frequency decoding chip 200 and the primary DSD audio stream for generating reduction reduction become the audio decoder chip of analog music signals
300.Application processor chip 100 and DSD audio decoder chip 200, DSD audio decoder chip 200 and audio decoder chip 300
Pass through the connection of digital audio-frequency data bus (I2S) 400.
That is, DSD audio stream is re-grouped package raw PCM audio stream and is sent to DSD audio decoder by application processor chip 100
Chip 200.The original DSD audio stream reduction for the PCM audio stream that code set is bundled by DSD audio decoder core 200 becomes original
Audio decoder chip 300 is sent to after raw DSD audio stream.The primary DSD audio stream for again being generated reduction by audio decoder chip 300
Reduction becomes analog music signals.
In this way, DSD audio stream is re-grouped package into PCM audio stream on application processor chip 100 by the smart phone, then
Primary DSD audio stream is restored by PCM audio stream by DSD audio decoder chip 200, it finally will by audio decoder chip 300
Primary DSD audio stream reduction is played out as analog music signals, this is not DSD in the process and encodes to pcm encoder
Conversion, DSD audio stream is only re-grouped package as PCM audio stream, do not lose and change any data information, music file
Quality will not be deteriorated, and greatly ensure that sense of hearing, and smart phone is allowed to play primary DSD high quality audio stream, for intelligence
Mobile phone makes substantive promotion on HIFI music playback function, and ultimate attainment music also can be enjoyed by smart phone for masses
Experience contributes.
The voice data stream transmission supported due to current mobile phone application processor chip 100 to 192kHz sample rate, and
The sample rate of DSD audio stream is 2.8244MHz, therefore application processor chip 100 is bundled into DSD audio stream again lossless group
Then the PCM audio stream of 192kHz sample rate is transferred to DSD audio decoder chip according to the PCM audio stream of 192kHz sample rate
200。
The primary DSD audio-frequency decoding method of smart phone of the present invention, system and smart phone, will on application processor chip
DSD audio stream is re-grouped package as PCM audio stream, then restores primary DSD by PCM audio stream by DSD audio decoder chip
Primary DSD audio stream is finally restored by audio decoder chip and is played out as analog music signals by audio stream, this process
In be not DSD and encode conversion to pcm encoder, DSD audio stream is only re-grouped package into PCM audio stream, does not lose and changes
Become any data information, the quality of music file will not be deteriorated, greatly ensure that sense of hearing, smart phone be allowed to play original
Raw DSD high quality audio stream is made substantive promotion for smart phone on HIFI music playback function, can also be led to for masses
It crosses smart phone and enjoys ultimate attainment music experience and contribute.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (3)
1. a kind of primary DSD audio-frequency decoding method of smart phone, which comprises the steps of:
S10: DSD audio stream is re-grouped package into PCM audio stream by the application processor chip of smart phone by control, and is sent to
DSD audio decoder chip；
S20: the original DSD audio stream of the PCM audio stream re-grouped package is reduced by control by DSD audio decoder chip
For primary DSD audio stream, and it is sent to audio decoder chip；
S30: the primary DSD audio stream reduction that control is generated reduction by audio decoder chip becomes analog music signals；
The step S10 specifically:
DSD audio stream again lossless group is bundled into 192kHz sample rate by the application processor chip of smart phone by control
Then PCM audio stream is transferred to DSD audio decoder chip according to the PCM audio stream of 192kHz sample rate.
2. a kind of primary DSD audio decoding system of smart phone characterized by comprising re-group package into DSD audio stream
The original DSD audio stream of the PCM audio stream re-grouped package is reduced into original by the application processor chip of PCM audio stream
The DSD audio decoder chip of raw DSD audio stream and the primary DSD audio stream reduction for generating reduction become analog music and believe
Number audio decoder chip；The application processor chip and the DSD audio decoder chip, the DSD audio decoder chip
Pass through digital audio-frequency data bus with the audio decoder chip to connect；
The application processor chip is bundled into DSD audio stream again lossless group the PCM audio stream of 192kHz sample rate, then
DSD audio decoder chip is transferred to according to the PCM audio stream of 192kHz sample rate.
3. a kind of smart phone, which is characterized in that including primary DSD audio decoding system；The primary DSD audio decoding system
It include: that DSD audio stream is re-grouped package into the application processor chip of PCM audio stream, the PCM audio stream that will be re-grouped package
The primary DSD that original DSD audio stream is reduced into the DSD audio decoder chip of primary DSD audio stream and generates reduction
Audio stream reduction becomes the audio decoder chip of analog music signals；The application processor chip and the DSD audio decoder
Chip, the DSD audio decoder chip pass through digital audio-frequency data bus with the audio decoder chip and connect；
The application processor chip is bundled into DSD audio stream again lossless group the PCM audio stream of 192kHz sample rate, then
DSD audio decoder chip is transferred to according to the PCM audio stream of 192kHz sample rate.
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| CN106504759B (en) * | 2016-11-04 | 2019-07-26 | 维沃移动通信有限公司 | A kind of mixed audio processing method and terminal device |
| CN107507617B (en) * | 2017-08-15 | 2022-04-22 | 深圳山灵数码科技发展有限公司 | System and method for realizing DSD audio hard solution |
| WO2019084887A1 (en) * | 2017-11-03 | 2019-05-09 | 深圳传音通讯有限公司 | Sound quality conversion method and device for audio, terminal and computer-readable storage medium |
| CN114783452B (en) * | 2022-06-17 | 2022-12-13 | 荣耀终端有限公司 | Audio playing method, device and storage medium |
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