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    • 24. 发明授权
    • Image signal recording apparatus having intrapicture and interpicture
coding modes
    • 图像信号记录装置具有图像内和图像间编码模式
    • US5774624A
    • 1998-06-30
    • US453437
    • 1995-05-30
    • Masahiko Enari
    • Masahiko Enari
    • G11B27/032G11B27/036H04N5/783H04N5/926H04N5/76H04N5/92
    • H04N5/9262G11B27/032G11B2220/90G11B27/036H04N5/783
    • A video signal recording apparatus is capable of compressing the amount of information of a video signal sequentially containing a plurality of pictures correlated to one another. In this compression, the video signal recording apparatus can selectively assume an intrapicture coding mode for executing compression by using only a correlation within each of pictures of the video signal and an interpicture coding mode for executing compression by using a correlation between a plurality of pictures of the video signal. When a video signal the amount of information of which is compressed is to be recorded on a recording medium, the video signal recording apparatus starts recording with a video signal compressed in the intrapicture coding mode. When a video signal compressed by variable-length coding is to be recorded while sequentially forming a multiplicity of tracks on a recording medium, the video signal recording apparatus begins recording a picture to be recorded immediately after the start of recording, at the forefront of the tracks.
    • 视频信号记录装置能够压缩顺序地包含彼此相关的多个图像的视频信号的信息量。 在该压缩中,视频信号记录装置可以选择性地采用用于通过仅使用视频信号的每个图像内的相关性和用于通过使用图像信号的多个图像之间的相关性来执行压缩的图像间编码模式来执行压缩的图像间编码模式 视频信号。 当视频信号被压缩的信息被记录在记录介质上时,视频信号记录装置开始以以图像内编码模式压缩的视频信号进行记录。 当在记录介质上顺序地形成多个轨道的同时记录通过可变长度编码压缩的视频信号时,视频信号记录装置开始在记录开始之后立即记录要记录的图像,位于记录介质的最前沿 轨道
    • 28. 发明授权
    • Liquid crystal optical device
    • 液晶光学器件
    • US4898456A
    • 1990-02-06
    • US348138
    • 1989-05-05
    • Shinjiro OkadaOsamu TaniguchiAkira TsuboyamaMasahiko Enari
    • Shinjiro OkadaOsamu TaniguchiAkira TsuboyamaMasahiko Enari
    • G02F1/141G09G3/36
    • G09G3/3692G02F1/141G09G3/3629G09G3/3681G09G2310/06G09G2310/061G09G2310/065G09G2320/0247
    • A liquid crystal optical device, comprising: (a) a liquid crystal cell comprising a pair of base plates and a ferroelectric smectic liquid crystal disposed between the base plates and capable of being oriented to one of stable orientation states including a first stable orientation state on one side and a second stable orientation state on the other side under no electric field; (b) means for applying an alternating electric field capable of orienting the ferroelectric smectic liquid crystal oriented to the first stable orientation state to a third stable orientation state and orienting the ferroelectric smectic liquid crystal oriented to the second stable orientation state to a fourth stable orientation state; (c) means for applying a first electric field capable of orienting the ferroelectric smectic liquid crystal to the one side of the stable orientation state and orienting the other stable orientation state selectively depending on an information input; and (d) means for detecting an optical difference between light rays having passed through the ferroelectric smectic liquid crystal oriented to the third stable orientation state and light rays having passed through the ferroelectric smectic liquid crystal oriented to the fourth stable orientation state.
    • 一种液晶光学器件,包括:(a)液晶单元,包括一对基板和设置在所述基板之间的铁电体相液晶,并且能够被定向到包括第一稳定取向状态的稳定取向状态之一 另一侧无电场的一侧和第二稳定取向状态; (b)用于施加能够将取向为第一稳定取向状态的铁电体相液晶取向至第三稳定取向状态的交变电场的装置,并将取向为第二稳定取向状态的铁电体相液晶取向为第四稳定取向 州; (c)用于施加能够将铁电体液晶体定向到稳定取向状态的一侧并根据信息输入选择性地定向另一稳定取向状态的第一电场的装置; 以及(d)用于检测通过了取向为第三稳定取向状态的铁电体相液晶的光线与通过导致第四稳定取向状态的铁电体相液晶的光之间的光学差的装置。