Title:
TELEVISION RECEIVER
Document Type and Number:
Japanese Patent JPH0646376
Kind Code:
A
Abstract:
PURPOSE: To improve noise resistance property by providing a receiver with a de-emphasis step having a correlative noise removing circuit, and providing a corresponding transmitter with a circuit for deforming a transmission signal, so that the correlative noise removing circuit of receiver can recover the signal. CONSTITUTION: This receiver is provided with a de-emphasis circuit composed of a subtracter, delay circuit, α-multiple circuits 401-403 and inverter circuit 406, while including the circuit for removing a correlative noise. Corresponding to this circuit, the transmitter is provided with a pre-emphasis circuit composed of an adder, a delay element, an α-multiple circuit, a processor, a G gain step and inverter circuits 301-306. The circuit of receiver constitutes feedforward for subtracting the received signal of the certain scanning line from the received signal of preceding scanning line. At the transmitter, a transmission scanning line, corresponding to a video scanning line subtracted from the section of preceding scanning line, is generated by a feedback loop. Thus, signals are increased, and an S/N can be improved.
Inventors:
SUKOTSUTO SHII NOOAA
ARAN NARAYAN NETORABARI
ARAN NARAYAN NETORABARI
Application Number:
JP15507491A
Publication Date:
February 18, 1994
Filing Date:
June 01, 1991
Export Citation:
Assignee:
AMERICAN TELEPHONE & TELEGRAPH
International Classes:
H04B1/10; H04N5/21; H04N5/922; H04N7/015; H04N7/08; H04N7/16; H04N7/26; H04N11/08; H04N11/24; H04N19/00; (IPC1-7): H04N7/00; H04B1/10; H04N5/21; H04N5/92; H04N7/13; H04N11/08
Domestic Patent References:
| JPS6240887A | 1987-02-21 |
Attorney, Agent or Firm:
Hirofumi Mimata
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