Method and apparatus for auto-tuning of a radio fm-receiver

• US 20050227648A1
• Filed: 06/04/2003
• Published: 10/13/2005
• Est. Priority Date: 06/07/2002
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Tan, Han Leng Paxton
• Granted Patent: US 7,848,720 B2
• Time in Patent Office: Days
• US Class Current: 455/154.100
• CPC Class Codes: H03J 1/0066 with means for analysing the received signal strength H03J1/0083 takes precedence
• CPC Class Codes: H03J 1/0091 provided with means for scanning over a band of frequencies H03J1/0058 takes precedence

Abstract

In a method of auto-tuning a radio FM-receiver the receiver frequency band is scanned until a FM signal is received meeting criteria for identifying the signal as being of a predetermined quality, particularly coming from a valid FM station. At least during tuning it is permanently established whether or nor the FM signal meets the criteria, whereafter the results thereof are read a predetermined number of times, and the FM signal is only stored if at least most of these times the criteria are met. Particularly, the results are read 10 times and the FM signal is only stored if at least 8 times thereof the criteria are met.

Claims

1. Method of auto-tuning a radio FM-receiver by scanning the receiver frequency band until a FM signal is received meeting critera for identifying the signal as being of a predetermined quality, particularly coming from a valid FM station, characterized in that at least during tuning it is permanently established whether or nor the FM signal meets the criteria, whereafter the results thereof are read a predetermined number of times, and the FM signal is only stored if at least most of the times the criteria are met.

2. Method as claimed in claim 1, characterized in that the results are read 10 times and the FM signal is only stored if at least 8 times thereof the criteria are met.

4. Radio FM-receiver for realizing the method of claim 1 or 2, comprising an auto-tuning device according to claim 3.

5. Algorithm for processing FM signals in an auto tuning device according to the method of claim 1 or 2.

7. Information carrier, carrying instructions to be executed by signal processing means, the instructions being such as to enable said processing means to perform the method according to claim 1 or 2.

3. Auto tuning device with means to register whether or not a FM signal, received in a radio FM receiver, meets criteria for identifying the signal as being of a predetermined quality, particularly coming from a valid FM station, and counting means to register in an interval of a predetermined number of times that is registered whether or not the FM signal meets the criteria, the number of times the FM signal meets the criteria.

6. Computer program capable of running on signal processing means in a radio FM receiver or cooperating with a radio FM receiver comprising the auto tuning device according to claim 3.