发明名称 |
NICAM compatible television signal converter |
摘要 |
A NICAM compatible baseband television signal converter is provided. A television signal including a NICAM digital audio subcarrier is converted to baseband and the NICAM subcarrier is filtered therefrom. The video and analog audio portions of the baseband television signal are demodulated. The demodulated video is descrambled and the demodulated analog audio is descrambled and/or volume controlled. The demodulated video and analog audio signals are then remodulated onto respective video and analog carriers. The filtered NICAM digital audio subcarrier is mixed with the video carrier to provide a modulated NICAM carrier. The remodulated video and analog audio signals are combined with the modulated NICAM carrier for output to a video appliance such as a television or video recorder.
|
申请公布号 |
US5220602(A) |
申请公布日期 |
1993.06.15 |
申请号 |
US19910805192 |
申请日期 |
1991.12.09 |
申请人 |
GENERAL INSTRUMENT CORPORATION |
发明人 |
ROBBINS, CLYDE;TAUPIER, LEONARD |
分类号 |
H04N5/60;H04N7/16 |
主分类号 |
H04N5/60 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|