Title:
METHOD FOR DETERMINING THE SIGNAL STRENGTH AT THE INPUT OF A TUNER
Document Type and Number:
WIPO Patent Application WO2003047098
Kind Code:
A3
Abstract:
The invention relates to a method for determining the strength of a signal (18) at the input of a tuner (1a.) In this, the frequency-dependent amplification characteristic for the tuner is measured and stored in a memory assigned to the tuner. With the help of this characteristic, the frequency-dependent variation of the amplification can be compensated during tuner operation, in order that the input signal strength can be deduced more precisely. For a tuner with automatic gain control (AGC), the frequency dependence of the AGC can also be recorded and stored in the memory by representative characteristics. The consideration of the AGC characteristics results in a further improvement to the precision of estimation of the input signal strength.
Inventors:
VAN DER WIJST HENDRICUS M (NL)
Application Number:
PCT/IB2002/005196
Publication Date:
February 12, 2004
Filing Date:
November 25, 2002
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
PHILIPS CORP INTELLECTUAL PTY (DE)
VAN DER WIJST HENDRICUS M (NL)
PHILIPS CORP INTELLECTUAL PTY (DE)
VAN DER WIJST HENDRICUS M (NL)
International Classes:
H03G3/20; H04B1/16; H04N5/44; H04N5/52; H04N5/50; (IPC1-7): H04N5/52; H03J1/00; H03G3/30
Foreign References:
| US20010028244A1 | 2001-10-11 | |||
| US5129098A | 1992-07-07 |
Other References:
See also references of EP 1451929A2
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