Invention Grant
- Patent Title: Apparatus for measuring noise in an analog signal
- Patent Title (中): 用于测量模拟信号中噪声的装置
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Application No.: US13586854Application Date: 2012-08-15
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Publication No.: US08593526B1Publication Date: 2013-11-26
- Inventor: Alan Hendrickson , David Trager , Zhongchun Liu
- Applicant: Alan Hendrickson , David Trager , Zhongchun Liu
- Applicant Address: US TX Austin
- Assignee: Silicon Laboratories Inc.
- Current Assignee: Silicon Laboratories Inc.
- Current Assignee Address: US TX Austin
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Agent Michael B. Davis
- Main IPC: H04N17/02
- IPC: H04N17/02 ; H04N5/08

Abstract:
Techniques are disclosed relating to video signal-to-noise ratio (VSNR) measurement. In one embodiment, an analog television signal receiver includes a measurement circuit configured to measure noise in a video signal over one or more intervals that correspond to a horizontal control signal of the video signal and a control unit configured to determine a VSNR based on the measurement. In another embodiment, a first noise calculation circuit is configured to determine first noise information from a video signal and a second noise calculation circuit is configured to determine second noise information from a video signal in a manner different from the first noise calculation circuit. A control unit may be configured to generate a VSNR based on one or both of the first noise information and the second noise information.
Information query