Title:
【発明の名称】ビデオ信号のオーバースキャン部分のディジタルデータを伝送するシステムおよびその方法
Document Type and Number:
Japanese Patent JP2694221
Kind Code:
B2
Abstract:
A system and method for transmitting digital data in the horizontal overscan portion of a composite video signal is presented. A source supplies digital data which is encoded by a 32-state QAM encoder using a symbol clock having a frequency 4fsc, 4 times the color subcarrier frequency (fsc), then the encoded data is quadrature amplitude modulated using a carrier signal with a frequency of fsc/2. The modulated digital data replaces the video signal in the horizontal and vertical overscan portions of the baseband video signal. The video signal is received, the modulated digital data is extracted from the video signal, demodulated using QAM techniques, and decoded with a reconstructed version of the symbol clock.
Inventors:
Cyprasad buoy. Nine Paris
Application Number:
JP23847193A
Publication Date:
December 24, 1997
Filing Date:
September 24, 1993
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H04N11/14; H04N7/08; H04N7/081; (IPC1-7): H04N11/14; H04N7/08; H04N7/081
Domestic Patent References:
| JP6225342A | ||||
| JP5630378A | ||||
| JP2113780A |
Attorney, Agent or Firm:
Shusaku Yamamoto