公开(公告)号：WO9527378A2

公开(公告)日：1995-10-12

申请号：PCT/US9504051

申请日：1995-03-31

Applicant: APPLE COMPUTER

Inventor： STEVENSON DAVID K ,  KANNAPELL HENRY N ,  HEYL LAWRENCE F

IPC: H04N9/80 ,  G11B27/024 ,  G11B27/029 ,  G11B27/034 ,  G11B27/036 ,  H04N5/7826 ,  H04N9/804 ,  H04N9/808 ,  H04N9/83

CPC classification number: G11B27/036 ,  G11B27/024 ,  G11B27/029 ,  G11B27/034 ,  G11B2220/415 ,  G11B2220/90 ,  H04N5/78263 ,  H04N9/83 ,  H04N9/831

Abstract: The present invention includes a system for processing and recording digitized component television signals onto analog video tape. Such a system includes a digital color transformation matrix for generating a digital luminance signal, a first digital chrominance signal, and a second digital chrominance signal. The signals are then sample rate reduced, interleaved, and stored in a storage subsystem (72), which may include a disk array. The storage subsystem allows a constant rate, uninterrupted data stream to be produced. To record the signals onto video tape, the signal data is read from the storage subsystem and separated. A series of digital signal processing elements, coupled to the digital luminance signal (read from the storage subsystem), are used to generate a digital filtered and frequency modulated luminance signal. A second series of digital signal processing elements, coupled to the first and second digital chrominance signals (also read from the storage subsystem), are used to generate a digital low pass filtered and amplitude modulated composite chrominance signal. These signals are combined, then converted into an analog composite recording signal compatible with a predetermined VCR standard (74). The system may also include a controlled video tape mechanism (78) which allows frame accurate recording so that a single, long program may be recorded as a series of concatenated shorter length clips.

Abstract translation: 本发明包括一种用于在模拟录像带上处理和记录数字化分量电视信号的系统。 这种系统包括用于产生数字亮度信号，第一数字色度信号和第二数字色度信号的数字颜色变换矩阵。 然后，信号被采样率降低，交织并存储在可以包括磁盘阵列的存储子系统（72）中。 存储子系统允许产生恒定的速率，不间断的数据流。 要将信号记录到录像带上，信号数据从存储子系统读取并分离。 使用耦合到数字亮度信号（从存储子系统读取）的一系列数字信号处理元件来产生数字滤波和调频亮度信号。 使用耦合到第一和第二数字色度信号（也从存储子系统读取）的第二系列数字信号处理元件来产生数字低通滤波和幅度调制复合色度信号。 这些信号被组合，然后转换成与预定VCR标准（74）兼容的模拟复合记录信号。 该系统还可以包括允许帧精确记录的受控磁带机构（78），使得可以将单个长的程序记录为一系列连接的较短长度的片段。