TELEVISION TUNER
First Claim
1. A television turner for control of directivity of an antenna, comprising:
- a directivity control section that outputs an electric signal to select a directivity of the antenna, the directivity control section includes;
plurality of directional antennas coupled with a plurality of phase shifter circuits, with a phase shifter circuit of the plurality of phase shifter circuits controlling a phase shift amount of a signal input from a directional antenna of the plurality of directional antennas and delaying a phase of the signal according to a bias voltage output from the television tuner to control the directivity of the directional antenna for any direction, and for generating a directivity value;
a tuner section that receives television broadcast signals in a predetermined band from the antenna and outputs an intermediate frequency (I/F) signal;
a signal condition detector section that detects a signal condition of the I/F signal, with the signal condition based on a channel number of a channel and directivity value;
if a frequency signal of the I/F signal is a digital frequency signal, the signal condition is determined by detecting a bit error rate;
if the frequency signal of the I/F signal is an analog signal, the signal condition is determined by detecting an AGC voltage output;
a channel storing section that stores the channel number of the channel and the directivity value of the directional antenna as a channel select data if the signal condition of the I/F signal is commensurate with a predetermined signal condition;
if it is determined that the channel select data is stored, a video signal control processing is executed to display an image, after which, it is determined if an auto-scan start command has been input;
if it is determined that the channel select data is not stored, it is determined if the auto-scan start command is input;
if it is determined that the auto-scan start command is input, the auto scan processing is executed.
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Accused Products
Abstract
Disclosed is a television tuner for receiving television broadcast signals with an antenna, which is equipped with an auto-scan unit that causes a channel storing section, which stores a receiving channel at the time when the signal condition from a tuner section matches the predetermined signal condition, to automatically store the receiving channel, wherein the auto scan unit detects switches among the receiving channel sequentially in the tuner section to detect the signal condition, and, after signal condition is detected for every channel, performs a variable directivity control for the antenna, resulting in an increased auto-scan execution speed.
15 Citations
3 Claims
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1. A television turner for control of directivity of an antenna, comprising:
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a directivity control section that outputs an electric signal to select a directivity of the antenna, the directivity control section includes; plurality of directional antennas coupled with a plurality of phase shifter circuits, with a phase shifter circuit of the plurality of phase shifter circuits controlling a phase shift amount of a signal input from a directional antenna of the plurality of directional antennas and delaying a phase of the signal according to a bias voltage output from the television tuner to control the directivity of the directional antenna for any direction, and for generating a directivity value; a tuner section that receives television broadcast signals in a predetermined band from the antenna and outputs an intermediate frequency (I/F) signal; a signal condition detector section that detects a signal condition of the I/F signal, with the signal condition based on a channel number of a channel and directivity value; if a frequency signal of the I/F signal is a digital frequency signal, the signal condition is determined by detecting a bit error rate;
if the frequency signal of the I/F signal is an analog signal, the signal condition is determined by detecting an AGC voltage output;a channel storing section that stores the channel number of the channel and the directivity value of the directional antenna as a channel select data if the signal condition of the I/F signal is commensurate with a predetermined signal condition; if it is determined that the channel select data is stored, a video signal control processing is executed to display an image, after which, it is determined if an auto-scan start command has been input; if it is determined that the channel select data is not stored, it is determined if the auto-scan start command is input; if it is determined that the auto-scan start command is input, the auto scan processing is executed. - View Dependent Claims (2, 3)
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Specification