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09为汽车应用实现完美音频处理方案,支持Bongiovi DPS专利技术

http://www.wendangku.net/doc/1fa5de3e915f804d2b16c17b.html
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DSP LC75056 Bongiovi DPS
Automotive SEC Sr. FAE /Tony Hu
DSP LC75056 Bongiovi DPS
2 1 Confidential Proprietary
LC75056 DSP
LC75056 LC75055 DSP Acoustics Digital Power Station (DPS) LC75055 Bongiovi
---mono-bal×1
mono-bal×1 or mono-single×2 mono-single×1
1. LC75056
Monaural Selector Input => 2Mono ch 3ch or 4ch Mode Balanced=2,Single=1 Balanced=1,Single=3 In/Out PORTx4 ADC 2ch DAC 2ch
EVR
Stereo Selector Input => 2Stereo ch 3ch or 4ch Mode Balanced=2,Single=1 Balanced=1,Single=3
ADC 2ch
High Quality
Pure 24bits calculation (24x24bit, 24bits AD/DA, ) Hardware Sampling Rate Converter(supports from 8kHz to 96kHz) AEC-Q100 (by request)
DF for DAC
ST-bal×1 or ST-Single×2 ST-bal ×1 amp
EVR DAC 2ch EVR
ADC 2ch
ST-single×1
Bass/Tre/Mid EQ Function Mixing Volume Mute (Blend)
EVR DAC 2ch EVR
Unique Software
I2S Output
Fully Customizable from attractive libraries(*4) Up-to-date sound technology DPS Control GUI with customized LSI
Digital Audio Source
Digital Selector 5=>4(for SRC) 5=>1(for Output) SRC (Stereo 4ch)
Short Time Launch
Flash Memory instead of ROM (786kbits) Evaluation board with the Control GUI Cordial support for control software and circuit design
PLL
Note Exclusive function pins
Host Interface System Controller
3
4
Digital Audio Source
Flash Memory 786kb = Program RAM
Power AMP 100PIN
AUDIO-DSP 2core 24bit 220MIPS
DF for ADC
EVR

1-1. LC75056

In Mono Single Single x3 Differential x1 Differential Single x1 Differential x2
/
In
1-1. LC75056

5ch Independence 5ch 3ch Synchronous o 1ch Through 3ch 1 pass through 3ch Independence 3ch 4ch Synchronous 4ch 3ch Synchronous o 1ch Through 3ch 1 through
/
Stereo
Out
Example Input
Single x3 Differential x1
6ch
Input => 2Mono ch 3ch or 4ch Mode Balanced=2,Single=1 Balanced=1,Single=3
Single x1 Differential x2
Example Output
4ch Independence 4ch 3ch Synchronous pass 1ch Through
Out
TEL NAVI AUX CD
Monaural Selector
mono-bal×1 ×
ADC 2ch
mono-bal×1 × or × mono-single×2
mono-single×1 × ST-bal×1 × or ST-Single×2 × ST-bal ×1 amp
DSP cor e
EVR
DAC 2ch Power AMP EVR DF for DAC EVR
FL
FR
Example Output
Input => 2Stereo ch 3ch or 4ch Mode Balanced=2,Single=1 Balanced=1,Single=3
ADC 2ch
RL
Example Input DSP core
Stereo Selector
DAC 2ch
EVR EVR DAC 2ch EVR
AM
I2S I2S I2S
I2S Output
CD(44.1kHz sampling) DTV(48kHz sampling) DVD(48kHzsampling)
SRC (Stereo 4ch)
RR SW CE
Digital Selector 5=>4(for SRC) 5=>1(for Output)
FM
ST-single×1
5
6
2. LC75056
DSP
Program Support CH DPS New S-Live AViSS High Band Retriever 7 bands EQ Bas/Mid/Tre
2. LC75056
--1 6 2 5 3 4 4 4
9
5 4 6 2 7 2 8 6 9 6
Without algorithms
No operational o competitive No value
Ordinary algorithms
No competitive No attractive Low value
Superior algorithms
Attractive Competitive Higher value
13
Fad/Bal
Loudness SW Out
Delay
Limiter Mixing
Volume
7
8
Digital Audio Source
ADC 2ch

2. LC75056
---3
2-1. Bongiovi DPS--The Bongiovi DPS is a unique DYNAMIC range controller which is a combination of linear and non-linear code blocks. This allows for processing that dynamically responds to the audio content in the same way that our ears perceives sound. Traditional audio circuits work in a linear manner which imposes certain constraints when it comes to the amount of processing that can applied. The DPS process allows for a transparent yet aggressive approach to audio optimization for a given loudspeaker system.
DPS
Sound experience of recording studios
New S-Live
AViSS
Goodbye, Subwoofers!
DPS
Dynamic range is the difference between the loudest sound and the quietest sound in the sound source
Equalization is the processing of altering the amplitude of the audio signal at specific frequencies. This alteration can be in the form of a boost or reduction in gain of that frequency.
Natural 3D experience
3
Loudness is the characteristic of a sound that is primarily a psychological correlate of physical strength (amplitude). More formally, it is defined as "that attribute of auditory sensation in terms of which sounds
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Bongiovi DPS
The Classic Audio dilemma 1. Dynamic range limitations 2. Frequency Response limitations (equalization) 3. Environmental limitations (loudness) The DPS solution 1. Modifies the program material, in real-time, to maximize the performance of the speaker system 2. Dynamic range limitations: ability to construct the dynamic range to suite the application ( ) 3. Frequency Response limitations (equalization) ability to make extreme EQ adjusts (up to 20 db boost or cut) EQ 20dB 4. Environmental limitations (loudness) ( ) ability to build the dynamic range and frequency response to meet any environmental situation ability to selectively apply power based on the design of the loudspeaker Equalization Loudness ability to adapt to the mechanical limitations of the loudspeakers to prevent damage ability to independently control both the high and low frequency content
Dynamic Range
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Bongiovi DPS
Bongiovi DPS How our ears perceive sound
Bongiovi DPS
RMS power
13
Peak power/transients
14
ISO
vs
Dynamic Range and power A standard dynamic range circuit depends on power and is controlled with an Automatic Gain Control (AGC) Standard Power vs Frequency for equal SPL across all frequencies 10
Power
5
SPL
100
1K Frequency
15 K
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Bongiovi DPS
The DPS result
2-2.
Missing Fundamental No phase change Natural sound
(New S-Live)
Phantom 100Hz
100 200 300 400
100 200 300 400
Without S-Live
With S-Live
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New S-Live
Light Weight
Lighter Weight by the replacement to the smaller speakers
2-3.
Sound enhancer Natural sound
(AViSS)
Low Power
Less power consumption by less low frequency sound which requires electric power
Long history & High reliability
Good design
Better design is brought by more freely assignable speakers
Suitable for small cars
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!! Thank you!!
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