JP2738703B2 - Television signal delay adjustment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a system for broadcasting a conversation via a communication satellite or the like on a TV, and in particular, a system for eliminating difficulty in hearing due to a difference in breathing between the two. About.

[Conventional technology]

Conventionally, when broadcasting a conversation via a communication satellite on TV,
It was performed as shown in the figure (however, except for the part enclosed by the dotted line). That is, for example, a signal from a camera 1 (including sound) in Tokyo is sent to, for example, New York via the communication satellite 2 and displayed on the receiver 3. The people in New York watch this, send a signal to Tokyo by a camera (including sound) 4 and display it on a receiver 5. However, for people in New York, there were cases where only sound was sent through submarine cables.

These two signals are synthesized by the switching synthesis device 6, and
It is sent from the sending circuit 7.

[Problems to be Solved by the Invention] In the above-described conventional technology, at least sufficient consideration has not been given to signal delay due to the signal of New York passing through a communication satellite, so that conversations at two places become jerky, and as a viewer, There is also discomfort.

An object of the present invention is to eliminate such discomfort.

[Means for solving the problem]

The above object is achieved by transmitting only an audio signal without delay (or with an acceptable small delay).
It is desirable that the video signal be made in such a manner, but it is impossible in terms of the transmission band.

[Action]

To reduce the delay of the audio signal, only this signal
For example, let it pass through a submarine cable. In FIG. 1, a portion surrounded by a dotted line is a portion newly provided for this purpose.

That is, people in Tokyo and New York talk while listening to the audio signal with a small delay.

For a signal to be broadcast, a delay device 8 is inserted into the signal in Tokyo to match the video signal from New York. This delay time corresponds to the time required for the signal communication satellite to return from Tokyo to Tokyo via New York. It is about 0.5 seconds (15 frames).

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIG. In order to send Tokyo sound to New York via a submarine cable, only the sound signal is demodulated by the demodulator 9 and transmitted over the telephone line 10. Conversely, the New York voice is sent to Tokyo by the demodulator 11.

A delay device 8 is provided to match the time relationship between the two signals. This is switched and transmitted by the switching synthesizer 6.

According to this embodiment, at least the talker in Tokyo has some unnaturalness that the sound appears earlier, but there is an effect that the viewer does not have any unnaturalness.

Here, reference numerals 9, 10, and 11 in the drawing denote other routes for newly provided audio signals in the present invention, and reference numeral 8 denotes a newly provided delay device.

〔The invention's effect〕

According to the present invention, there is an effect that the sense of incongruity which has been repeatedly described so far can be eliminated.

In the embodiment of the present invention, the case where the video signal is transmitted by the round-trip communication satellite has been described, but one may be another satellite.

In addition, a configuration in which only one video signal is used and the other is only audio is possible. At this time, the delay time may be 1/2.

[Brief description of the drawings]

FIG. 1 is a diagram showing a prior art and an embodiment of the present invention. 1,4 ... TV camera, 3,5 ... Receiver, 8 ... Similar delay device, 9,10,11 ... Device for transmitting audio signal by another route.

Claims (1)

(57) [Claims] 1. A television signal delay adjustment system for broadcasting each video / audio signal obtained at a different first point and a second point at a first point on the side of a television, the method comprising the steps of: First means for receiving the obtained video signal at the first point via a satellite line, and transmitting each audio signal obtained at each point via the line having a smaller delay than the satellite line. Second means for transmitting each other between the points, and a video transmitted from the second point and received at the first point with only the video and audio signals obtained at the first point being delayed A television signal delay adjustment method, comprising: third means for broadcasting together with an audio signal.