Patent · US Expired

Method, system and apparatus for transmitting, receiving, and reproducing a digital broadcast signal

US6535717B1 · kind B1 · utility

50Cited by
8References
24Claims
0Family size

Assignee

Inventors

Key dates

Filing dateAug 31, 1999
Grant dateMar 18, 2003
Priority date
Expiry dateAug 31, 2019

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04N21/44209
  • WIPO fieldAudio-visual technology
  • WIPO sectorElectrical engineering

Abstract

The present system comprises a transmitting apparatus for digital broadcast which includes an original signal generating section, delaying section, information amount reducing section, and transmitting section. A receiving and reproducing apparatus for digital broadcast includes a signal reception front stage unit for receiving a high quality signal and a low quality signal, mode determining section and reproducing section composed of a delaying section and selecting section for selectively reproducing the high quality signal and the low quality signal. By employing time diversity, the transmitting apparatus sends the low quality signal having a smaller bandwidth and the high quality signal so that the low quality signal has a preceding time lag relative to the high quality signal, and the receiving apparatus reproduces broadcasting programs. Utilizing the frequency band for broadcast effectively, many broadcasting programs can be increased, and the investment for providing a gap filler can be minimized.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.