JP3917298B2 - Non-real-time information signal transmission system and apparatus in digital broadcasting - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a non-real-time information signal transmission system and transmission apparatus used in digital broadcasting having a plurality of apparent transmission paths such as an orthogonal frequency division multiplexing system before a transmission station.
[0002]
[Prior art]
Currently, television broadcasting is analog broadcasting, but various developments and researches are being conducted for digital broadcasting that will be started in the near future.
[0003]
[Problems to be solved by the invention]
For example, in analog broadcasting, non-real-time information signals such as still images and texts used in text broadcasting and data broadcasting are inserted at fixed positions called vertical blanking periods in NTSC television signals. The non-real time information signal having such a constant repetition period is repeatedly transmitted from a performance place (so-called studio) to a transmission place and transmitted.
[0004]
On the other hand, digital broadcasting has a plurality of apparent transmission paths such as an orthogonal frequency division multiplexing system before a transmission station, and can transmit a plurality of non-real time information signals simultaneously. However, in this case, if the current transmission path between the performance place and the transmitting station is used, it takes a burden due to the large amount of information, and multiple non-real-time information signals are repeatedly transmitted to the transmitting station simultaneously. I can't.
[0005]
The present invention has been made in view of the above points. Non-real-time information capable of simultaneously transmitting a plurality of non-real-time information signals having a fixed repetition period without imposing a burden on transmission between a performance place and a transmission place. An object is to provide a signal transmission system and apparatus.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a non-real time information signal transmission system in digital broadcasting according to the present invention includes:
A performance station that sends out only the first period of each of a plurality of non-real-time information signals each having a fixed repetition period at different timings;
A plurality of storage means for receiving and storing each of the plurality of non-real time information signals sent from the performance center, respectively;
Reading means for reading out each non-real time information signal stored in the plurality of storage means at the constant repetition period;
Transmitting means for multiplexing a plurality of non-real time information signals read by the reading means and transmitting them simultaneously;
A transmitting station with
It is characterized by providing.
[0007]
Also, the non-real time information signal transmitting apparatus in digital broadcasting according to the present invention transmits from a performance room that transmits only the first one period of each of a plurality of non-real time information signals each having a fixed repetition period at different timings. A plurality of storage means for receiving and storing each of the first non-real time information signals for each first period;
Reading means for reading out each non-real time information signal stored in the plurality of storage means at the constant repetition period;
Transmitting means for multiplexing a plurality of non-real time information signals read by the reading means and transmitting them simultaneously;
It is characterized by providing.
[0008]
That is, according to the non-real time information signal transmission system and transmission apparatus in digital broadcasting of the present invention,
Only one initial period of a plurality of non-real-time information signals each having a fixed repetition period is transmitted from the performance place at different timings, and the transmitting station sends them to a plurality of storage means at these different timings. Each of the plurality of non-real time information signals that have been stored is accumulated for the first one period, and each of the accumulated non-real time information signals is read out by the reading means at the predetermined repetition period and transmitted. Multiplex by means and transmit simultaneously.
[0009]
In this way, a new non-real-time information signal transmission device is introduced at the transmission station, and data is repeatedly transmitted from the transmission station, so that transmission between the performance station and the transmission station is not burdened. A plurality of non-real-time information signals having a repetition period of 1 can be transmitted simultaneously.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of a non-real time information signal transmission system in digital broadcasting according to an embodiment of the present invention. The non-real time information signal transmission system includes a performance place 10 and a transmission place 20. Yes. The transmitting station 20 includes a header determination unit 21, a switching unit 22, a plurality of storage units 23A, 23B, 23C, ..., 23n, a transmission unit 24, a multiplexing unit 25, and a transmission unit 26.
[0011]
Here, the header discriminating unit 21 discriminates the non-real time information signal by referring to the header part of the non-real time information signal transmitted from the performance place, and switches to the switching unit 22 according to the discrimination result. A signal is output. The switching unit 22 selectively supplies the non-real time information signal from the performance place 10 to one of the plurality of storage units 23A, 23B, 23C,..., 23n according to the switching signal. The units 23A, 23B, 23C,..., 23n accumulate non-real time information signals supplied from the switching unit 22, respectively.
[0012]
The sending unit 24 reads out non-real time information signals stored in the plurality of storing units 23A, 23B, 23C,..., 23n and sends them to the multiplexing unit 25. The multiplexing unit 25 multiplexes a plurality of non-real time information signals sent from the sending unit 24 and supplies them to the transmission unit 26, and the transmission unit 26 is multiplexed by the multiplexing unit 25. A non-real time signal is modulated by a predetermined modulation scheme (for example, orthogonal frequency division multiplexing) and transmitted.
[0013]
In such a configuration, the performance place 10 makes each cycle of the non-real-time information signals A, B, C,... Each having a repetition period, as shown in FIG. Transmit minutes at different timings. That is, the non-real time information signals A, B, C,... To be repeatedly sent are transmitted only once. In FIG. 2A, it is shown that one period of each of the plurality of non-real time information signals A, B, C,... Is continuously transmitted. There is no. Further, the contents of each non-real time information signal A, B, C,... Are updated every predetermined time such as 1 hour, and are transmitted only once at the time of the update.
[0014]
At the transmitting station 20, the header discriminating unit 21 discriminates the non-real time information signal by referring to the header of the transmitted non-real time information signal, and the switching unit 22 handles the non-real time information signal. To the storage unit. As a result, non-real time information signals A, B, C,... Are accumulated in the accumulating units 23A, 23B, 23C,.
[0015]
Then, the sending unit 24 simultaneously reads out one period of each of the plurality of non-real time information signals A, B, C,... Stored in the plurality of storage units 23A, 23B, 23C,. As shown in (C), the plurality of read non-real time information signals A, B, C,... Are repeatedly transmitted.
[0016]
The multiplexing unit 25 multiplexes the plurality of non-real time information signals A, B, C,... From the transmission unit 24 as shown in FIG. . Then, the transmission unit 26 modulates and transmits the non-real time signal multiplexed by the multiplexing unit 25 by a predetermined modulation method (for example, orthogonal frequency division multiplexing method).
[0017]
In this way, only the first one period of the plurality of non-real-time information signals A, B, C,... Each having a fixed repetition period is transmitted from the performance place 10 at different timings, and the transmitting station 20. Then, in the plurality of storage units 23A, 23B, 23C,..., 23n, the first one period of the plurality of non-real time information signals transmitted at different timings is stored, respectively. Thus, the stored non-real-time information signals are read out at the above-mentioned fixed repetition period, multiplexed by the multiplexer 25, and transmitted simultaneously from the transmitter 26, so that the performance station 10 to the transmitter 20 It is possible to transmit the repeated data to the receiver only once, and it is possible to repeatedly transmit a plurality of data simultaneously.
[0018]
While the present invention has been described based on one embodiment, the present invention is not limited to the above-described embodiment, and various modifications and applications are possible within the scope of the present invention. Of course.
For example, in the above-described embodiment, a plurality of storage units are provided, but this may be a plurality of areas of one memory.
[0019]
【The invention's effect】
As described above in detail, according to the present invention, a non-real time information signal transmission capable of simultaneously transmitting a plurality of non-real time information signals having a fixed repetition period without imposing a burden on transmission between a performance place and a transmission place. Systems and apparatus can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a non-real-time information signal transmission system in digital broadcasting according to an embodiment of the present invention.
FIG. 2 is a timing chart for explaining the operation of each unit at the transmitting station in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Performance place 20 Transmission place 21 Header discrimination | determination part 22 Switching part 23A, 23B, 23C, ..., 23n Accumulation part 24 Sending part 25 Multiplexing part 26 Transmitting part

Claims (2)

A performance station that sends out only the first period of each of a plurality of non-real-time information signals each having a fixed repetition period at different timings;
A plurality of storage means for receiving and storing each of the plurality of non-real time information signals sent from the performance center, respectively;
Reading means for reading out each non-real time information signal stored in the plurality of storage means at the constant repetition period;
Transmitting means for multiplexing a plurality of non-real time information signals read by the reading means and transmitting them simultaneously;
A transmitting station with
A non-real-time information signal transmission system in digital broadcasting, comprising: Each first one cycle of the plurality of non-real-time information signals sent from the performance center that sends out the first one cycle of the plurality of non-real-time information signals each having a fixed repetition period at different timings. A plurality of storage means for receiving and storing each,
Reading means for reading out each non-real time information signal stored in the plurality of storage means at the constant repetition period;
Transmitting means for multiplexing a plurality of non-real time information signals read by the reading means and transmitting them simultaneously;
A non-real time information signal transmission apparatus in digital broadcasting, comprising:

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