Cirrus CS4953xx多标准音频处理和后处理解决方案 - 音频/视频/显示 - 电子工程网
Cirrus公司的CS4953xx是32位音频DSP系列,工作频率150MHz,在片内的ROM中包括所有主流音频处理代码,从而节省了外接存储器和代码存储.不需要昂贵的外接SDRAM存储器就能完成Dolby数字环绕EX reg;, AAC多路, DTS-ES 96/24, THX Ultra2影院和Dolby耳机的译码任务,是下一代音频解决方案.本文介绍了CS4953xxx系列主要特性,方框图,CDB49x主板框图和相应的元件,DC4953x子板框图和相应的元件以及板的建立和连接图.
The CS4953xx DSP family are the enhanced versions of the CS495xx DSP family with higher overall performance and lower system cost. The CS4953xx includes all mainstream audio processing codes in on-chip ROM. This saves external memory for code storage. In addition, the intensive decoding tasks of Dolby Digital Surround EX reg;, AAC multi-channel, DTS-ES 96/24, THX Ultra2 Cinema and Dolby Headphone can be accomplished without the expense of external SDRAM memory.
With larger internal memories than the CS495xx, the CS49531x is designed to support up to 150 ms per channel of lip-sync delay. With 150 MHz internal clock speed, the CS4953xx supports the most demanding post-processing requirements. It is also designed for easy upgrading.
Customers currently using the CS495xx can upgrade to the CS4953xx with minor hardware and software changes The CS4953xx DSP Family, together with Cirrus Logic’s comprehensive library of audio processing algorithms enables the development of next-generation audio solutions. There are two classes of devices in the CS4953xx DSP family:
CS4953x3 Class (ROM ID 3), comprising the CS495303 and the CS495313
CS4953x4 Class (ROM ID 4), comprising the CS495304 and the CS495314
The primary difference between the CS4953x3 and the CS4953x4 classes is the support of the DSP Condenser application on the CS4953x4 class of products only. The DSP Condenser is a tool set that enables the DSP to automatically boot and configure itself from an external serial FLASH, thus reducing the traditional heavy loading on the part of the system microcontroller.
Multi-standard 32-bit Audio Decoding plus Post processing
Supports legacy audio formats and a wide array of postprocessing
— Dolby Digital reg; EX, Dolby Pro Logic reg; II, IIx, IIz 7.1,Dolby Headphone reg; 2, Dolby Virtual Speaker reg; 2,Dolby Volume reg; (original), Dolby Volume 258 (lite),Audistry reg;
— DTS-ES 96/24 Discrete 7.1, DTS-ES Discrete 7.1,DTS-ES Matrix 6.1, DTS Neo:6 reg;, DTS Neural Surround DTS Surround Sensation Speaker
— MPEG-2 AAC LC 5.1
— SRS reg; Circle Surround reg; II, SRS Circle Surround Auto,SRS Circle Surround Decoder Optimized, SRS TruVolume 7.1 (V 126.96.36.199), SRS TruSurround HD/HD4 reg;, SRS WOW HD , SRS CS Headphone , SRS Circle Cinema 3D , SRS Studio Sound HD
— THX reg; Ultra2 , THX Select2
Cirrus Logic’s Applications Library
— Cirrus Original Multi-Channel Surround 2 (COMS2), Cirrus Band XpandeR , Cirrus Virtualization Technology (CVT), Cirrus Intelligent Room Calibration 2 (IRC2), Cirrus Bass Enhancement (CBE)
— Crossbar Mixer, Signal Generator
— Advanced Post-Processors including: 7.1 Bass
Manager Quadruple Crossover, Tone Control, 11-Band Parametric EQ, Delay, 2:1/4:1 Decimator, 1:2/1:4 Upsampler
Up to 12 Channels of 32-bit Serial Audio Input