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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CS49400 датащи(PDF) 34 Page - Cirrus Logic |
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CS49400 датащи(HTML) 34 Page - Cirrus Logic |
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34 / 100 page  34 2. OVERVIEW The CS49400 is a 24-bit fixed-point decoder DSP followed by a 32-bit fixed point programmable post-processor DSP. The decoder portion of the CS49400 is referred to as “DSPAB”. The post- processor DSP is referred to as “DSPC”. Both DSPAB and DSPC include their own dedicated peripherals such as serial and parallel control ports, and serial audio interfaces. DSPC also has a external memory interface which supports SRAM/SDRAM/EPROM. All the decoding/processing algorithms listed below require delivery of PCM or IEC61937- packed compressed data via I2S or LJ formatted digital audio to the CS49400. Today the CS49400 will support all of the following decoding/processing standards: • PCM Pass-Through/PCM Upsampler • Dolby Digital™ (with Dolby Pro Logic)™ • Dolby Digital Pro Logic II™ • Dolby Digital EX™ • Dolby Digital EX Pro Logic II™ • MPEG-2, Advanced Audio Coding Algorithm (AAC) • MPEG Multichannel • MPEG Multichannel with Dolby Pro Logic II™ • MPEG-1/2, Layer III (MP3) • DTS Digital Surround™ • DTS 96/24™ (Front-end Decoder) • DTS Digital Surround™ with Dolby Pro Logic II™ • DTS-ES Extended Surround™ (DTS-ES Discrete 6.1 and DTS-ES Matrix 6.1) • DTS-ES 96/24™ (Front-end Decoder) • DTS Neo:6™ • LOGIC7® • SRS Circle Surround™ II • HDCD® All of the above audio decoding/processing algorithms and the associated application notes (AN208 and their corresponding appendices) are available through the Crystal WareTM Software Licensing Program. Please refer to AN208 for the latest listing of application codes for DSPAB. DSPC is unique to DSPAB in the sense that the designer may choose to just load a standard or enhanced application code (.ULD file) from the Crystal Ware Software Library or if they have access to the Cirrus Framework DSPC Development Kit, they may choose to build their own application code from a variety of modules. A DSPC application code contains all of the necessary post-processing modules, such as Crossbar Mixer, Pro Logic Module, Bass Manager Module, and Audio Manager (Kernel). A module is just a single processing module, such as Tone Control, Parametric/Graphic EQ, or Dolby Pro Logic matrix decoder. DSPC on the CS49400 will support the following post-processing application codes and/or modules: • Standard Post-Processor (includes the follow- ing modules all compiled into one .ULD file): Downmixer module, Dualzone module, Cross- bar Mixer module, 7.1 Channel Bass Manager module, Audio Manager module (Volume Control, Trim Control and Channel Remap), and Delay module • Advanced Post-Processor (includes the all of the standard post-processing modules plus the Tone Control module, Parametric EQ module, Re-EQ module in all compiled into one .ULD ) • Dolby Pro Logic™ • Dolby Pro Logic II™ • SRS Circle Surround II™ • DTS Neo:6™ • LOGIC7® • THX® Surround EX™ 7.1 Channel Post-Processor |
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