# US 5,703,662 A · Television for storing and displaying still picture

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- Number: US 5,703,662 A
- Document ID: US5703662A
- Status: Granted
- Kind: A
- Application number: 08/580,516
- Filed: 1995-12-28
- Granted: 1997-12-30
- Earliest claimed: 1995-08-05
- Assignees: Samsung Electronics Co., Ltd.
- Inventors: Hyung-su Yoon
- Web page: https://patentgrep.com/patent/US5703662A

## CPC

- H04N 5/44: Receiver circuitry {for the reception of television signals according to analogue transmission standards} (H04N5/14 takes precedence)
- H04N 21/433: Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N 21/44016: {involving splicing one content stream with another content stream, e.g. for substituting a video clip}
- H04N 21/44209: {Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network (arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896)}
- H04N 21/8153: {comprising still images, e.g. texture, background image}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A television for storing and displaying a stored still picture, which includes: a memory for storing a still picture of a desired scene; a decoder for separating a video signal of a broadcast channel into an RGB signal and a synchronizing signal; a synchronizing signal detector for outputting a detection signal according to the existence of the synchronizing signal; a microcomputer for controlling so that the RGB signal output from the decoder can be displayed on a picture tube by recognizing the detection signal when a normal broadcast signal is input and so that the still picture stored in the memory can be displayed on the picture tube when a normal broadcast signal is not input. Thus, if a broadcast channel goes off the air, or a channel which is not on the air is selected, a selected picture is retrieved from the memory and displayed on the television screen, thereby reducing eye fatigue.

## Claims

### Claim 1

A television having a memory for storing a still picture signal corresponding to a desired scene comprising:
signal processing means for separating a video signal of a broadcast channel into RGB signals and a synchronizing signal;
detecting means for outputting a detecting signal according to the existence of said synchronizing signal output from said signal processing means; and
control means for controlling so that said RGB signals are displayed on a picture tube when a normal broadcast signal is input and a still picture stored in said memory is displayed on the picture tube when no signal is input, by recognizing the detecting signal.

### Claim 2 (depends on 1)

A television according to claim 1, wherein said television further comprises a sound signal processing means for processing a sound signal of the broadcast channel to be output as an audio signal when the normal broadcast signal is input and for muting said sound signal when the normal broadcast signal is not input.

### Claim 3

A television comprising:
a tuner for converting an RF signal of a broadcast channel input through an antenna into an IF sound signal and an IF video signal;
demodulating means for demodulating a sound signal from said IF sound signal and a video signal from said IF video signal;
storage means for storing a still picture of a desired scene;
detecting means for detecting a synchronizing signal from the demodulated video signal to output a detecting signal; and
control means for controlling so that the video signal of the desired scene is stored in the storage means when a normal broadcast signal is input, input of the normal broadcast signal being recognized when said detecting means detects the synchronizing signal, and the still picture stored in the storage means is displayed when the normal broadcast signal is not input.

### Claim 4 (depends on 3)

A television according to claim 3, wherein said television further comprises sound signal processing means for processing the demodulated sound signal to be output as an audio signal when the normal broadcast signal is input and for muting said sound signal when the normal broadcast signal is not input.

### Claim 5 (depends on 3)

A television according to claim 3, wherein said television further comprises:
an external input terminal for receiving a video signal reproduced by an external picture recording/reproducing device; and
first switching means for selecting one of said demodulated video signal and said video signal input through said external input terminal under the control of said control means to output a selected signal to said storage means.

### Claim 6 (depends on 5)

A television according to claim 5, wherein said television further comprises second selection means for selecting said demodulated video signal when the normal broadcast signal is input and selecting the still picture stored in said storage means when the normal broadcast signal is not input, and outputting a selected signal to said picture tube under the control of said control means.

### Claim 7 (depends on 6)

A television according to claim 6, wherein said storage means comprises:
an analog-digital converter for converting a signal switched by said first switching means into a digital signal;
a flash memory for storing the digital signal of more than one screen under the control of said control means;
a video RAM for storing a portion of said digital signal which corresponds to one screen received from said flash memory;
a digital-analog converter for converting data read out from said video RAM into an analog signal; and
a clock generator for supplying driving clocks to said analog-digital converter, said flash memory, said video RAM, and said digital-analog converter.

### Claim 8

A television comprising:
a key input portion having at least one still picture storage key;
a tuner for converting an RF signal of a broadcast channel received through an antenna into an IF video signal and an IF sound signal;
a demodulator for demodulating a video signal and a sound signal from said IF video signal and said IF sound signal, respectively;
first signal processing means for separating said demodulated video signal into RGB signals and a synchronizing signal;
detecting means for detecting said synchronizing signal output from said first signal processing means to output a detecting signal;
control signal generating means for recognizing said detecting signal from said detecting means and a key input from said key input portion to output first to fourth control signals;
second signal processing means for processing said sound signal output from said demodulator to be output as an audio signal when a normal broadcast signal is input, input of the normal broadcast signal being recognized when said detecting means detects the synchronizing signal, and for muting said sound signal according to said first control signal when the normal broadcast signal is not input;
first switching means for selecting either said RGB signals output from said first signal processing means or RGB signals input from an external video recording/reproducing device according to said second control signal;
storage means for writing in and reading out the RGB signals selected by said first switching means according to said third control signal; and
second switching means for selecting either the RGB signals output from said first signal processing means or the RGB signals read out from said memory according to the fourth control signal, to display a switched signal on a picture tube.

### Claim 9 (depends on 8)

A television according to claim 8, wherein said storage means comprises:
an analog-digital converter for converting a signal switched by said first switching means into a digital signal;
a flash memory for storing the digital signal of more than one screen under control of said control signal generating means;
a video RAM for storing a portion of the digital signal output from said flash memory which corresponds to one screen;
a digital-analog converter for reading out data from said video RAM and converting the data read out from said video RAM into an analog signal; and
a clock generator for supplying driving clocks to said analog-digital converter, said flash memory, said video RAM, and said digital-analog converter.