초록 ▼

A television system for broadcasting high definition television on two channels of a direct broadcast satellite, a first of which carries a compatible 525-line picture. A second channel carries an augmentation signal, which in conjunction with the signal from the first channel, produces at a receive

A television system for broadcasting high definition television on two channels of a direct broadcast satellite, a first of which carries a compatible 525-line picture. A second channel carries an augmentation signal, which in conjunction with the signal from the first channel, produces at a receiver tuned to both channels a 1050-line high definition television picture with a 5:3 aspect ratio. Time multiplex component signals and processing are employed, and high fidelity sound is provided by digital audio signals transmitted in time sequence with the video. There may be as many as five sound channels so as to provide three-channel stereophonic audio and various combinations of data and sound channels.

대표청구항 ▼

A television transmission system compatible with a television system having N television lines and a standard aspect ratio picture format, said system comprising: a source of television picture signal having 2N television lines and a wider than standard aspect ratio picture format and the same heigh

A television transmission system compatible with a television system having N television lines and a standard aspect ratio picture format, said system comprising: a source of television picture signal having 2N television lines and a wider than standard aspect ratio picture format and the same height as said standard picture format, first means for deriving from said source for transmission through a first transmission channel a first television signal having N lines and said standard aspect ratio, and second means for deriving from said source for transmission through a second transmission channel simultaneously with the transmission of said first signal a second television signal having N lines and said wider than standard aspect ratio and containing information which when combined with that of said first television signal produces a high definition display having 2N lines and said wider than standard aspect ratio picture format.