Key facts
- Brand
- Analog Devices
- Model
- ADV611
- Category
- Video Decoder
- Documents
- 3
- Languages
- EN
- Last added
- 2012-08-03
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ANALOG DEVICES AN-524 ADV601/ADV611 Bin Width Calculation in ADSP-21xx DSP Application Note
This document explains how to use an Analog Devices ADSP-21xx family Digital Signal Processor (DSP) to control video compression in the ADV601 Video Codec chip. It details the design of the DSP to ADV601 interface and provides software for programming the DSP to manage the 'Bin Width Calculator' function.
The text describes the operation of the Bin Width Calculator, which adjusts 42 bin width and reciprocal bin width registers to achieve a desired compression ratio. It compares DSP-based versus host-based implementations, highlighting advantages such as real-time computation within the 1.2 milliseconds vertical retrace time and easier program development.
Analog Devices ADV611 specifications
| Vertical retrace time for bin width computation | 1.2 milliseconds |
|---|---|
| Number of sub-bands | 42 |
| Processor family | ADSP-21xx |
Source: ANALOG DEVICES AN-524 ADV601/ADV611 Bin Width Calculation in ADSP-21xx DSP Application Note
All Analog Devices ADV611 documents by type
How to use the product for one specific task, with worked examples.
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
What is the purpose of the Bin Width Calculator?
Its duty is to set all 42 bin width and 42 reciprocal bin width registers with the proper fraction to achieve the desired compression ratio.
From: ANALOG DEVICES AN-524 ADV601/ADV611 Bin Width Calculation in ADSP-21xx DSP Application Note
How does the Bin Width Calculator handle bit rate changes?
It responds to video changes by altering the bin-width register settings to achieve the desired bit rate, ensuring a constant bit rate for fixed communication links.
From: ANALOG DEVICES AN-524 ADV601/ADV611 Bin Width Calculation in ADSP-21xx DSP Application Note
Can the ADV601JS12 be used in existing ADV601 designs?
Yes, the ADV601JS12 chips will function in ADV601 designs with no hardware or software changes.
From: Analog Devices AN-549 Application Note New Features in the ADV601 Video Codec Family
What is the purpose of the CREF pin in the new chips?
The CREF pin can be used to stall or throttle the raw video interface in CCIR 656 mode or Multiplexed Philips mode.
From: Analog Devices AN-549 Application Note New Features in the ADV601 Video Codec Family
Are the ADV611/ADV612 compatible with the ADV601?
Yes, the ADV611 and ADV612 are 100 % bitstream compatible with the ADV601.
What video formats does the device support?
The codecs support CCIR‑656 and multiplexed Philips video formats.