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    • 7. 发明授权
    • Television signal arrangement where selected signals are encoded
digitally
    • 所选信号被数字编码的电视信号排列
    • US5040062A
    • 1991-08-13
    • US495559
    • 1990-03-19
    • Scott C. KnauerKim N. MatthewsArun N. NetravaliEric D. PetajanRobert J. SafranekPeter H. Westerink
    • Scott C. KnauerKim N. MatthewsArun N. NetravaliEric D. PetajanRobert J. SafranekPeter H. Westerink
    • H04N7/30H04N7/015H04N7/08H04N7/26H04N7/32H04N7/36
    • H04N7/08H04N19/51H04N19/61H04N19/63H04N7/015H04N19/30
    • A high definition television system that is characterized by low transmission bandwidth is achieved by removing redundancies in the signal and encoding the remaining signals. In the encoding, a portion of the signals to be transmitted is created in the form of an analog signal or a concatenated plurality of pulse amplitude coded samples (A-signal), and another portion of the signals to be transmitted is created in digital form (D-signal). The D-signal is consigned to a specified portion of the transmitted signal, leaving the remainder of the transmission capacity for the A-signal. When the normally created digital signals do not fully occupy the digital portion, enhanced operation results when selected ones of the analog signals or samples are excised from the A-signal, encoded digitally, and added to the D-signal. The excising of those signals leaves room in A-signal portion to include additional analog signals. This leads to an overall better image reproduction at the receiver. In addition, the samples that are excised are selected from among be the ones whose delection from the A-signal benefits the system most.
    • 通过去除信号中的冗余并对其余信号进行编码,实现了低传输带宽的高清晰度电视系统。 在编码中,以模拟信号或级联的多个脉冲幅度编码采样(A信号)的形式产生要发送的信号的一部分,并且以数字形式创建要发送的另一部分信号 (D信号)。 D信号被委托给发送信号的指定部分,留下A信号的剩余传输容量。 当正常创建的数字信号不完全占用数字部分时,当选择的模拟信号或采样中的一个模拟信号或采样被从数字地被编码并被添加到D信号中时,增强的操作成为A信号。 这些信号的切除在A信号部分中留下空间以包括额外的模拟信号。 这导致在接收器处的整体更好的图像再现。 另外,从A信号中选择出来的那些最受益于系统的样本被选出。