公开(公告)号：US07145851B2

公开(公告)日：2006-12-05

申请号：US10448928

申请日：2003-05-30

申请人： Akio Fukushima ,  Masayoshi Okawa

发明人： Akio Fukushima ,  Masayoshi Okawa

IPC分类号： G11B7/005

CPC分类号： G11B20/1403 ,  G11B7/0045 ,  G11B27/24 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2545 ,  G11B2220/2562

摘要： In the CAV recording, it is necessary to vary the recording-system clock frequency in accordance with movement of a recording position, and conventionally a signal generated by multiplying a wobble signal is used as the recording-system clock. However, since the wobble signal is easily susceptible to influences of a disk and a pick-up and its quality is prone to be deteriorated by an influence of a large amount of light at the time of recording etc., it is difficult to maintain jitters of the recording-system clock to a sufficiently low value. To resolve this problem, instead of generating a recording-system clock signal from the wobble signal that is susceptible to noise, a necessary recording-system clock frequency is calculated from the address information that has been modulated into the wobble signal and recorded therein, and a signal of this frequency is generated from a stable reference signal source, such as a quartz oscillator, by a synthesizer method and used as the recording-system clock.

摘要翻译： 在CAV记录中，需要根据记录位置的移动来改变记录系统时钟频率，并且通常将通过将摆动信号相乘产生的信号用作记录系统时钟。 然而，由于摆动信号容易受到盘的影响和拾取，并且由于在记录时的大量光的影响，其质量容易劣化，因此难以保持抖动 的记录系统时钟到足够低的值。 为了解决这个问题，代替从容易受到噪声的摆动信号产生记录系统时钟信号，根据已经被调制到摆动信号中并被记录在其中的地址信息计算必要的记录系统时钟频率， 该频率的信号通过合成器方法从稳定的参考信号源（例如石英振荡器）产生并用作记录系统时钟。

公开(公告)号：US06377358B1

公开(公告)日：2002-04-23

申请号：US09219896

申请日：1998-12-24

申请人： Kimiyuki Hayasaki ,  Koji Yamakawa ,  Tsuyoshi Orikasa ,  Hiroyuki Kigami ,  Hisashi Fukai ,  Takayuki Ono ,  Masayoshi Okawa ,  Satoshi Kudo

发明人： Kimiyuki Hayasaki ,  Koji Yamakawa ,  Tsuyoshi Orikasa ,  Hiroyuki Kigami ,  Hisashi Fukai ,  Takayuki Ono ,  Masayoshi Okawa ,  Satoshi Kudo

IPC分类号： B41B1500

CPC分类号： B41J2/04508 ,  B41J2/04536 ,  B41J2/04563 ,  B41J2/04565 ,  B41J2/0458 ,  B41J2/04588 ,  B41J2/04591 ,  B41J2/04598 ,  B41J29/393 ,  B41J2202/21

摘要： A method for correcting a recording head is provided to solve the problems of density unevenness in recorded images. The density comparison is made with the reference density for a predetermined unit in the density distribution of an image recorded by the application of n kinds of signals. Then, one of the n kinds of signals which is close to the reference density is selected. The properties of the signal thus selected are transmitted to the recording head together with the correction data, hence correcting density unevenness.

摘要翻译： 提供了一种用于校正记录头的方法，以解决记录图像中的浓度不均匀性的问题。 通过应用n种信号记录的图像的浓度分布中的预定单位的参考密度进行密度比较。 然后，选择接近参考密度的n种信号之一。 所选择的信号的属性与校正数据一起发送到记录头，从而校正浓度不均匀性。