Title:
TRANSMITTER AND RECEIVER FOR RANDOM DATA
Document Type and Number:
Japanese Patent JP3132235
Kind Code:
B2
Abstract:
PURPOSE: To avoid mis-detection of random data as synchronization data at a receiver side by taking notice of a level of random data not less than a pedestal level.
CONSTITUTION: When data recorded on a tape 1 are random data, inverted data of MSB are added to 9-th bit and composite synchronization data are added to a 10-th bit. and the MSB is set to '1' in 8-bit random data reproduced by a reproduction circuit 3 at an encoder 7 and the resulting data are outputted to a selector 9. The selector 9 receives blanking data from a blanking data generator 8 and selects the blanking data based on a signal (b) and provides an output of the data. Thus, encoded random data are outputted from the selector 9 for a period other than the horizontal blanking line in which random data in 10-bits are outputted from the blanking period to provide composite random data. Thus, a selector 10 provides an output of the composite random data encoded in 10-bits to the line 11.
Inventors:
Mikio Ishii
Application Number:
JP10726793A
Publication Date:
February 05, 2001
Filing Date:
April 12, 1993
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H03M7/14; H04N5/92; (IPC1-7): H03M7/14; H04N5/92
Domestic Patent References:
| JP58194107A | ||||
| JP2276315A | ||||
| JP216815A |
Other References:
【文献】EMPTE 244M,”Proposed American National Standard for television digital recording-representation of NTSC encoded(system M)video signal-active video portion”
Attorney, Agent or Firm:
Atsuo Waki (1 person outside)