Article ID: 000074900 Content Type: Troubleshooting Last Reviewed: 11/21/2011

Precision Must be Set When Using Lanczos Coefficients in Scaler

Environment

    Quartus® II Subscription Edition
BUILT IN - ARTICLE INTRO SECOND COMPONENT

Critical Issue

Description

When configuring the Scaler MegaCore function, you must choose the correct coefficient precision when using Lanczos coefficients.

This issue affects configurations of the Scaler MegaCore function using the polyphase algorithm with Lanczos coefficients.

The MegaCore function fails to generate.

Resolution

If you select polyphase mode with Lanczos coefficients, you must set the coefficient precision to be signed with one integer bit. Fraction bits can be set within the full range available in the MegaWizard interface.

The coefficient precision restriction will be enforced in future versions of the Video and Image Processing Suite.

Related Products

This article applies to 1 products

Intel® Programmable Devices

1