Title:
【発明の名称】デイジタル信号処理装置
Document Type and Number:
Japanese Patent JP2777260
Kind Code:
B2
Abstract:
PURPOSE:To compensate the transmission characteristic with a simple circuit by providing a compensation means giving a prescribed transmission characteristic before or after a D/A converter means in a processing unit applying D/A conversion to an A/D-converted signal after required digital processing and transmitting the result. CONSTITUTION:Each of plural stages of digital signal processing units sending a high Vision TV high definition picture is provided with a resample circuit 2 A/D-converting a transmission signal, a digital signal processing circuit 3 provided with a descrambler 10 or the like to apply required digital processing and a D/A converter circuit 4. Then an LPF 12 is provided after a D/A converter 11, a prescribed roll-off characteristic is provided to the transmission signal to compensate the transmission characteristic. Moreover, the similar processing is provided by providing a digital HPF providing a reverse characteristic to the sinx/x before the converter 11 instead and the transmission characteristic is compensated with simple circuit constitution.
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Inventors:
IZUMI YOSHINORI
GOSHI SEIICHI
NINOMYA JUICHI
NAEMURA MASAHIDE
MURAKAMI KEINOSUKE
GOSHI SEIICHI
NINOMYA JUICHI
NAEMURA MASAHIDE
MURAKAMI KEINOSUKE
Application Number:
JP6726890A
Publication Date:
July 16, 1998
Filing Date:
March 19, 1990
Export Citation:
Assignee:
NIPPON HOSO KYOKAI
International Classes:
H04N5/14; H03H15/00; H03H17/00; H03H21/00; H03M1/00; H04B3/04; H04N7/015; H04N11/04; (IPC1-7): H04N5/14; H03H17/00; H03M1/00; H04N7/015; H04N11/04
Attorney, Agent or Firm:
Akihide Sugimura (5 outside)