Television – Basic receiver with additional function – For display of additional information
Reexamination Certificate
1998-08-31
2001-03-20
Hsia, Sherrie (Department: 2614)
Television
Basic receiver with additional function
For display of additional information
C348S731000
Reexamination Certificate
active
06204888
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a television receiver, and particularly to a method for displaying a progressive degree of channel setting which informs of a progressive degree of automatic channel setting when an automatic channel setting mode is operated in a television receiver having various channels.
The present application is based upon Korean Application No. 97-44522, which is incorporated herein by reference.
2. Description of the Related Arts
As cable and wireless broadcasting technologies have been developed, television receivers having high performance receive broadcasting signals transmitted through a cable/wireless transmitting unit and then output the received broadcasting signals to users.
Referring to the attached drawings, a process of setting channels automatically in a conventional television receiver is explained.
FIG. 1
is a block diagram illustrating the structure of the conventional television receiver. As shown in the drawing, when power is applied to the conventional television receiver, as the user selects a desired channel by pressing a key equipped in a key input unit
20
which is located at a television main body
130
or in a remote controller
30
which is separated from the television main body
130
, a selected signal is input to a microcomputer
10
through a remote receiving unit
30
a
and an on-screen display unit
120
receives a control signal of the microcomputer
10
, thereby displaying the selected channel number on the screen of a cathode ray tube
110
.
Simultaneously, a tuner
50
receives the control signal of the microcomputer
10
and then outputs a broadcasting signal corresponding to the selected channel out of the broadcasting signals received through an antenna ANT. The broadcasting signal output from the tuner
50
is input to an audio signal processing unit
80
and a video signal processing unit
90
through an intermediate frequency unit
60
for processing an intermediate frequency and a detection unit
70
for detecting the signals.
In addition, the audio signal processing unit
80
processes only audio signals out of combined video signals output from the detection unit
70
and then outputs the processed signals to a speaker
100
. The video signal processing unit
90
only processes video signals out of combined video signals output from the detection unit
70
and then outputs the processed signals to the cathode ray tube
110
. As a result, viewers can enjoy the video and audio each output from the cathode ray tube
110
and the speaker
100
.
In the above-described television receiver, the viewer can select a desired channel using two methods. First, using a number key equipped in the key input unit or the remote controller, the viewer can select the channel by directly inputting the number of the desired channel. Second, using a channel up/down key equipped in the key input unit or the remote controller, the viewer can select the channel by ascending or descending order number neighboring the present channel number.
Conventionally, since the first method is troublesome in inputting the channel number of two digits, the second method is widely used in selecting the channel excluding the case of selecting a channel which is far apart from the present channel.
As the communication types have been developed, with the increase of the communication sources such as the cable television broadcasting in addition to the conventional public television broadcasting, it takes much time to select one channel in watching the television. As a result, an automatic setting function on the channels capable of being selected is required.
Actually, the number of channels capable of being selected in the television receiver is varied according to the kind of a channel. That is, a general channel has 68 channels, i.e., channel 02 to channel 69, and an extended channel has 125 channels, i.e., channel 01 to channel 125. Since it is necessary to store the channels capable of being selected out of a plurality of channels in a memory
40
shown in
FIG. 1
, the user can select a desired channel by scanning the channels stored in the memory
40
successively. However, in the conventional automatic channel setting method, only one channel which is set automatically is displayed. Accordingly, the user cannot know how many channels have been tested for an automatic setting out of all the channels capable of being selected and must wait until the test is completely performed on all of the channels to know the extent of the automatic set channels.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a method for displaying a progressive degree of automatic channel setting by providing a calculated percentage value of the number of channels which have the automatic setting test on the total number of channels capable of being selected.
According to one aspect of the present invention, the method for displaying a progressive degree of channel setting in a digital television receiver includes the steps of: setting a kind of channel; acquiring the total number of channels corresponding to the kind of the channel which is set; starting an automatic channel setting by selecting a start channel; calculating a tested number of channels by obtaining an absolute value of the difference between the start channel and a present channel; calculating a percentage value of the tested number of channels based on the total number of channels and storing the calculated percentage value in a memory; displaying the percentage value stored in the memory on a predetermined display unit; determining whether the present channel is a final or last channel in the total number of channels; and incrementing the present channel up by one in the case that the present channel is not the final channel and returning to the step of calculating tested number of channels to repeatedly perform the subsequent steps.
Preferably, the total number of channels is 68 in a general channel and 125 in an extended channel. Also, in order to calculate the tested number of channels, a preferable expression of: the percentage value={(|the start channel−the present channel|)/total number of channels}×100 is used. Finally, the display unit preferably consists of a cathode ray tube.
According to another aspect of the present invention, the method for displaying a progressive degree of channel setting in a digital television receiver of a PAL tuner type includes the steps of: setting a kind of channel; acquiring a maximum frequency and a minimum frequency according to the kind of channel which is set; starting an automatic channel setting starting from the minimum frequency; calculating the percentage value of the difference between the present channel frequency and the minimum frequency with respect to the difference between the maximum frequency and the minimum frequency; displaying the calculated percentage value on a predetermined display unit; determining whether the present channel frequency is the maximum frequency; and increasing the present channel frequency by 1 Mhz in the case that the present channel frequency is not the maximum frequency and returning to the step of calculating the percentage value to repeatedly perform the subsequent steps.
Preferably, in order to calculate the percentage value, an expression of: the percentage value={(the present frequency−the minimum frequency)/(the maximum frequency−the minimum frequency)}×100 is used.
REFERENCES:
patent: 5735035 (1998-04-01), Rotzoll
Hsia Sherrie
Samsung Electronics Co,. Ltd.
Sughrue Mion Zinn Macpeak & Seas, PLLC
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