JP2003169227A - Digital broadcasting system, digital broadcasting compiling apparatus, and its compiling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcasting system for distributing a digital broadcasting program to a television receiver compatible with each digital broadcasting in a way that everyone can easily select an optional view form and reproduce the program. <P>SOLUTION: The compiling apparatus A distributes an analog broadcast program obtained by an analog broadcast reception section 12 into video, main/ sub audio, and teletext data, assigns video + main audio to a channel #1, assigns video + sub audio to a channel #2, assigns video + main audio + teletext data to a channel #3 respectively, and MPEG (moving picture experts group) encoders 161 to 163 respectively encode them. In this case, the teletext data are composed to the video. A multiplexer 18 converts encoded outputs of the encoders 161 to 163 into TS packets, applies time division multiplex to the packets, and a digital broadcast transmission section 19 transmits the multiplexed packet to a television receiver C compatible with digital broadcasting connected to an in-house network B as a digital broadcast signal. The receiver C can select any of three view forms only through channel selection. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcasting system which converts an analog television signal into a digital television signal and retransmits it.

[0002]

2. Description of the Related Art At present, in an analog television broadcasting system, a main broadcast signal, a main / sub audio signal for stereo / dubbing, and a data signal for telecasting (hereinafter referred to as a character multiplex signal) are added to a video signal of a main broadcasting program. It is provided with a function of selecting stereo reproduction, dubbing reproduction, and character reproduction such as subtitles and profile of the viewed program by separating and demodulating the multiplexed signal on the receiving side.

On the other hand, in the next-generation terrestrial digital television broadcasting system, each content data of video and audio used in a program is multiplexed and transmitted, and each content is demodulated at the receiving side and combined and reproduced at appropriate timing. By doing so, the broadcast program can be viewed. Further, as a data broadcasting program, data of characters and still images are multiplexed with the content data of the main program, and separated and demodulated on the receiving side so that the video of the main program can be synthesized and displayed.

In this terrestrial digital broadcasting, simulcasting is planned to be distributed in parallel with the analog broadcasting during the transition period from the existing analog broadcasting. Also,
Until the spread of television receivers dedicated to digital broadcasting, digital broadcast-compatible set-top boxes (ST
B) is provided and the STB is connected to the existing television receiver, so that the digital broadcast can be viewed on the existing television receiver. In the following description, "STB + existing television receiver" will be referred to as a digital broadcasting compatible television receiver.

By the way, in hotels, hospitals, etc., an in-house television broadcasting system is constructed, and a broadcasting signal is sent to a television receiver installed in each room such as a guest room or a sick room, so that the current television broadcasting is carried out in each room. Can be viewed at. In this case, it is necessary to consider a foreigner who wants to switch the voice to English and listen to it or a hearing-impaired person who wants to view the teletext on the screen. Conventionally, a remote controller (hereinafter, referred to as a remote control) can perform a voice switching operation and a teletext display selection operation. However, since recent television receivers have become multifunctional, the remote controller operation procedure is performed. Is complicated, and it is difficult for foreigners and people with disabilities to operate.

[0006] With the start of terrestrial digital broadcasting, it is expected that even in in-house broadcasting systems such as hotels and hospitals, a television receiver compatible with digital broadcasting will be installed in each room. At this time, during the simulcast, the analog broadcast will be distributed in parallel with the digital broadcast, but for the above-mentioned reason, it is possible to select and watch any viewing mode with a simple operation for either broadcast. It is requested to do so.

[0007]

As described above, when a large number of television receivers compatible with digital broadcasting are installed in a facility such as a hotel or hospital with the start of terrestrial digital broadcasting, user operation is required. In consideration of the nature, it is desired to systemize so that anyone can easily select and play any viewing mode.

According to the present invention, in order to meet the above-mentioned demands, a television receiver compatible with each digital broadcast can distribute a digital broadcast program so that anyone can easily select an arbitrary viewing mode and reproduce it. An object of the present invention is to provide a possible digital broadcasting system, a digital broadcasting organization device and a method of organizing the same which can be used in this system.

[0009]

To achieve the above object, a digital broadcasting system according to the present invention provides a video signal from an analog television signal and at least one of a main audio signal, a sub audio signal, and a character multiplex signal. A signal separating means for separating the video signal, the main audio signal, the sub audio signal, and the character multiplex signal separated by this means are arbitrarily combined for each channel, coded for each channel, multiplexed, and converted into a digital broadcast signal. And a transmitting means for transmitting the digital broadcast signal obtained by this means, and a digital broadcast receiving means for receiving the digital broadcast signal transmitted through this means and reproducing it in a viewing mode by the channel selection. It is characterized by

In particular, the organization means is provided with a screen synthesizing means for superimposing characters of the character multiplex signal on the screen of the video signal when the video signal and the character multiplex signal are combined.

In the digital broadcasting system having the above-mentioned configuration, a program based on one analog television signal is screen-synthesized with a video signal and a main audio signal, a video signal and a sub audio signal, and a character based on a character multiplex signal. Since the viewing modes by various combinations such as, etc. are made to correspond to each channel, encoded and multiplexed respectively and transmitted in the form of digital broadcast signals, only the channel selection operation can be performed in the receiving means compatible with digital broadcasting. With, it becomes possible to select a plurality of viewing modes.

The above-mentioned organization means includes a signal separating means for separating a video signal, a main audio signal, a sub audio signal and a character multiplex signal from the analog television signal, and a video signal, a main audio signal and a sub audio signal separated by this means. A plurality of channel-corresponding encoding means for taking in and encoding a voice signal and a character multiplex signal in an arbitrary combination, a multiplexing means for multiplexing respective outputs of the plurality of encoding means, and a multiplexed output of this means It is realized by a knitting device provided with a signal conversion / transmission means for converting into a digital broadcast signal and transmitting it.

The knitting method of this knitting apparatus is such that a video signal, a main audio signal, and a character multiplex signal separated from an analog television signal are coded in arbitrary combinations for each channel, multiplexed, and converted into a digital broadcast signal, At least in a channel in which a video signal and a character multiplex signal are combined, a character of the character multiplex signal is superimposed and encoded on the screen of the video signal.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram of a digital broadcasting system according to the present invention, which is applied to a broadcasting system in a hotel room, and is used for a digital broadcasting-compatible television receiver in which a current analog television broadcasting is installed in a guest room. It is a block diagram which shows the structure at the time of rebroadcasting on. In order to simplify the description, a case of organizing a received program of one wave analog broadcast channel will be described.

In FIG. 1, a knitting apparatus A is installed in a broadcasting room in a hotel building, receives an analog broadcasting signal received by an antenna 11 and inputs it to an analog broadcasting receiving section 12.

The analog broadcast receiving section 12 selects a predetermined channel signal from the input analog broadcast signal,
The video modulation signal, audio modulation signal, and character multiplex data signal are separated. The video modulation signal is demodulated by the video demodulation unit (DEM) 13 to become a video signal. This video signal is distributed to three systems, and the video signals of the two systems are respectively channel # 1.
And # 2 MPEG encoders (ENC) 161, 16
2 is sent directly to the second video signal of the remaining one system
MPEG encoder 163 of channel # 3 via
Sent to. Further, the voice modulation signal is demodulated by the voice demodulation unit 14 and separated into a main voice signal and a sub voice signal, and the main voice signal is sent to the MPEG encoders 161 and 163 of channels # 1 and # 3, and the sub voice signal. Is channel # 2
Is supplied to the MPEG encoder 162. The character multiplex data signal is demodulated by the character multiplex demodulator 15 and screen-synthesized with the video signal by the screen synthesizer 17.

The MPEG encoders 161 to 163 of the above-mentioned channels # 1 to # 3 convert the input video and audio signals into MPEG2 (Moving Picture Experts G).
roup 2) encoding, and the encoded output of each channel is TS (Transpor
t Stream) packet and then time-division multiplexed and supplied to the digital broadcast transmitter 19. The digital broadcast transmitter 19 converts the time-division-multiplexed TS packet into an OFDM (Orthogonal Frequency Division Multiplexing) signal of the digital broadcast standard system, frequency-converts it into a predetermined band, and sends it out as one wave of the digital broadcast signal. To do.

The digital broadcasting signal transmitted from the knitting apparatus A having the above-mentioned structure is transmitted via the wired or wireless network B in the room to a digital broadcasting-compatible television receiver (STB + existing TV receiver) installed in the guest room. Sent to C). Each television receiver C receives the digital broadcast signal from the organization device A,
For example, by selecting and operating channels # 1 to # 3 with the remote controller, the TS packets of the selected channel can be separated and demodulated and reproduced and output.

In the case of supporting analog broadcasting signals of n channels, the above-mentioned knitting device A is installed side by side and the digital broadcasting signals are sent to the in-house network B in different bands.
Shall be sent to. In addition, separately, when the reception signal of the terrestrial digital broadcast is directly sent to the in-house network B, the output band of the knitting apparatus A is set to a band different from the band of the terrestrial digital broadcast reception signal.

The operation of the above configuration will be described below.

First, in this system, the analog broadcast program obtained by the analog broadcast receiving section 12 is distributed to a video signal, a main / sub audio signal, and a character multiplex signal, and a video signal + main audio signal is assigned to channel # 1, The video signal + sub audio signal is assigned to channel # 2, the video signal + main audio signal + character multiplex signal is assigned to channel # 3, and the MPEG encoders 161 to 163 respectively encode the signals. At this time, the character multiplex signal is screen-synthesized with the video signal. The encoded outputs of the encoders 161 to 163 are multiplexed devices 1
At 8, the packets are converted into TS packets, time-division multiplexed, and sent from the digital broadcast transmission section 19 as a digital broadcast signal to the television receiver C compatible with digital broadcasting connected to the in-house network B.

As an example, the case of broadcasting a movie program will be described. First, in channel # 1, Japanese, which is the main audio, is overlaid on the video, in channel # 2, the English, which is the sub audio, is overlaid, and in channel # 3, the subtitles, which are character multiplex signals, are screen-synthesized and the main audio The Japanese that is is piled up.

As described above, in the present system, the same program is digitally broadcast in different viewing modes for each channel. Therefore, in the television receiver C installed in each room, the channels can be switched. It is possible to select main / sub audio switching and subtitle display / non-display switching, thereby eliminating complicated operations of the remote controller.

In the next-generation terrestrial digital broadcasting, three channels of the current analog broadcasting can be multiplexed and broadcast in one broadcasting signal band. Therefore, in the above system, even if a program of one channel of analog broadcasting is organized into three viewing modes and distributed to three channels, the transmission equipment can be shared by the multiplex transmission. Therefore, it can be said that there is little increase in equipment cost, installation space, and power supply capacity, and there are few disadvantages associated with the increase in the number of channels.

In the next-generation terrestrial digital broadcasting, it is planned to multiplex data broadcasting programs, and in general, a character multiplex signal may also be multiplexed as one of the digital broadcasting data broadcasting programs. Conceivable. However, in reality, a synchronizing process with the video is required, and the configuration of the knitting apparatus A becomes complicated and expensive. If the characters of the character multiplex signal are embedded in the video signal and broadcast as in the present system, synchronization processing and the like are unnecessary, the device configuration is simplified, and the cost can be reduced.

Further, since the data broadcasting is not performed, the data broadcasting receiving / reproducing function can be omitted even in the television receiver C compatible with the digital broadcasting, and a low cost receiver can be used. This brings an effect that it can contribute to early spread of terrestrial digital broadcasting.

(Second Embodiment) FIG. 2 is a block diagram of a digital broadcasting system according to the present invention applied to a hotel in-house broadcasting system for a digital broadcasting-compatible television receiver in which a current analog television broadcasting is installed in a guest room. FIG. 11 is a block diagram showing a configuration in the case of displaying a telop such as an emergency guide on the screens of all channels when re-broadcasting on. For simplicity of description, the case of organizing a received program of one analog broadcast channel will be described. In FIG. 2, the same parts as those of the system configuration shown in FIG. 1 are designated by the same reference numerals, and different parts will be described here.

In FIG. 2, the video demodulation unit 1 of the knitting device A
3, the outputs of the voice demodulation unit 14 and the character multiplex demodulation unit 15 are supplied to the screen synthesis unit 20. The screen synthesizing unit 20 takes in the text data input from the text input terminal 21, synthesizes the screen at a predetermined portion of the video signal demodulated by the video demodulating unit 13, and MPEG encoders 161 and 162 of channels # 1 and # 2. To the MPEG of the channel # 3 by further synthesizing the characters of the character multiplex signal on the screen at a predetermined position
It is sent to the encoder 163. The output of the voice demodulation unit 14 is the same as in the case of FIG.

That is, in the system having the above configuration,
Screens of arbitrary text are combined with the video signals of all channels # 1 to # 3 and converted into digital broadcast signals. Therefore, in the television receiver of each guest room,
Similar to the embodiment described above, the main / sub audio can be switched and the presence / absence of character multiplexing can be switched only by the channel selection operation, and an arbitrary text is displayed on the screen regardless of which channel the user is watching. , It is possible to show emergency information to all viewers.

(Third Embodiment) FIG. 3 and FIG. 4 respectively apply a digital broadcasting system according to the present invention to a hotel in-house broadcasting system, and receive a television program corresponding to a digital broadcasting in which a hotel independent program is installed in a guest room. FIG. 3 is a block diagram showing a configuration for broadcasting to a device. FIG. 3 assumes an in-house facility guide, nearby tourist / store guide, disaster prevention guide, etc. as a hotel independent program, and FIG. 4 assumes a karaoke compatible music video as a hotel independent program. still,
The system configuration of this embodiment is almost the same as the system configuration shown in FIG. Therefore, in FIG. 3 and FIG.
The same parts as those in FIG. 1 are designated by the same reference numerals, and different parts will be described here.

In the system shown in FIG. 3, instead of the analog broadcast receiving section 12, a video reproducing apparatus (DVD, VTR) is used.
Etc.) 22 and the video output of the in-house broadcast video reproduced by the video reproduction device 22 is supplied to the video distributor 23, the audio output is supplied to the audio distributor 24, and the character multiplex signal is the character multiplex demodulator 15 , And the video signal, the main / sub audio signal, and the character data are demodulated. After that,
Similar to the system of FIG. 1, channel # 1 is video + main audio, channel # 2 is video + auxiliary audio, channel #
In the case of 3, the processing is performed so as to be video + main voice + character.

For example, in the case of broadcasting a video of facility guidance, while displaying an emergency exit image on each of channels # 1 to # 3, the guidance is played in Japanese as the main voice in # 1 and the sub voice in # 2. The guidance can be played in English, and in # 3, the guidance can be played in Japanese telop while the guidance is played in Japanese as the main voice.

The system shown in FIG. 4 is the same as the system shown in FIG. 3 in that the video reproducing device 22 is used, but here the video output of the video distributor 23 is sent to channel # 4, and the screen synthesizing section 17 is used. To channel # 6, and the main audio output of audio distributor 24 is sent to channels # 4 and # 4.
5 to send the sub audio output to channel # 6. Also,
The character data output of the character multiplex demodulation unit 15 is performed by the screen synthesis unit 17.
The screen is composited with the video output.

As an example of this system, an appropriate image, music containing a singer's voice as a main voice, so-called karaoke music without a singer's voice as a sub voice, and video containing lyrics as character multiplex data are reproduced. The case will be described.

First, video and main audio are input to the MPEG encoder 161 of channel # 4. For this reason,
When channel # 4 is selected by the television receiver C, music including the voice of the singer is played along with the display of the image. Further, no video is input to the MPEG encoder 162 of channel # 5, and only main audio is input. For this reason, the channel #
When 5 is selected, only the music containing the singer's voice is played, and no image is displayed. In this case, it can be used as background music. To the MPEG encoder 163 of channel # 6, a video and sub-audio in which lyrics characters are screen-synthesized are input. Therefore, when channel # 6 is selected on the television receiver C, lyrics are displayed on the image and music without the singer's voice is played. In this case, it can be used as karaoke.

(Fourth Embodiment) In the above embodiment, in the configuration of the organization device A, the same program whose viewing mode is different from each other is distributed to a plurality of channels and is multiplexed and broadcast. However, channel selection is performed on the television receiver side. It is also effective to preset the priority order of.

FIG. 5 is a flow chart showing an embodiment in which the television receiver C is provided with a channel priority selection function in the system configuration shown in FIG. Here, in the in-house broadcast, it is assumed that Japanese audio (main audio) is assigned to channel # 1, English audio (sub audio) to channel # 2, and subtitles (character multiplex data) to channel # 3.

In FIG. 5, first, when the power of the television receiver C is turned on (or when the power of the remote controller is turned on).
A menu screen for selecting a desired viewing mode at the time of broadcasting in the hall is displayed on the screen (step S1). For example, "Please select your desired viewing mode when broadcasting in the hall.
push button of remote key.> 1. Japanese <Japanes
e> 2. English <English> 3. Subtitles <Japanese capti
on> ”is displayed and the viewer operates the keys on the remote
Prompt to choose one of.

When any one of 1 to 3 is selected by the remote control operation, or when no input has been made even after a predetermined time has elapsed, this is discriminated (step S2), and when 1 is selected or the predetermined If the time has not been entered, "I will play in Japanese voice. Are you sure?" Will be displayed (Step S
3) When 2 is selected, "Do you agree to Engl
"ish mode?" is displayed (step S4), and if 3 is selected, "Is it with subtitles. Are you sure?" is displayed (step S5). At this time, the "YES" and "NO" selection buttons are simultaneously displayed.

Next, it is judged whether the user operates the remote controller to select "YES" or "NO" or to input no data for a predetermined time (step S6). If "NO" is selected, the process returns to step S2 to redisplay the selection screen, and if "YES" is selected or no input has been made for a predetermined time, the setting completion is displayed (step S7). . For example, in the case of 1, "Japanese voice has been set." In the case of 2, "Se
In the case of "t English mode", 3, "Subtitle has been set." is displayed. After a certain period of time, the channel selection screen is displayed (steps S8 and S9).

When the in-house broadcast channel is selected (step S10), the previously set viewing mode is judged (step S11). Here, if it is set to 1, channel # 1 is selected to play Japanese voice (step S12), and if it is set to 2, channel # 2 is selected.
Is selected to play English voice (step S13), and if set to 3, channel # 3 is selected to display subtitles (step S14). After that, the process returns to step S10, and the processing of the set viewing mode is performed every time the in-house broadcast channel is selected.

Although not shown, in consideration of the case where the viewing mode is desired to be switched when viewing the in-house broadcasting channel, the reset button of the remote controller is turned on to perform step S1.
Then, the viewing mode selection screen is displayed and the switching setting is enabled.

If the program data based on the above flow chart is downloaded from the knitting apparatus A as control data, the processing content can be easily changed.

With the above arrangement, the viewer can view the in-house broadcast in a desired form without performing a switching operation. This is extremely effective in that it becomes easy for foreigners and hearing-impaired persons to understand the contents, especially during emergency broadcasting.

(Other Embodiments) The above embodiments relate to the case where the present invention is applied to the in-house broadcasting system of a hotel, but the present invention is not limited to this. For example, it can be applied to broadcasting systems such as hospitals and schools (especially when there are special classes). Furthermore, if the network is replaced with a CATV network, it can be used for a CATV system.

It is also possible for a terrestrial digital broadcasting station to use the system of the present invention to organize analog broadcasting and re-broadcast it as digital broadcasting.

In any case, according to the system configuration of the present invention, the organization equipment on the transmission side can flexibly cope with various viewing modes, and a television receiver compatible with digital broadcasting can also perform data transmission. It is possible to use simple character multiplexing without a broadcast receiving function, which can contribute to the spread of terrestrial digital broadcasting.

[0049]

As described above, according to the present invention, a digital broadcast program is distributed so that anyone can easily select and play any viewing mode on a television receiver compatible with each digital broadcast. It is possible to provide a digital broadcasting system capable of performing the above, a digital broadcasting program organization device and an organization method thereof that can be used in this system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a hotel hall broadcasting system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration in a case where arbitrary character multiple display is performed on all channels in the hotel building system as a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration when performing independent broadcasting (facility guidance or the like) in the hotel hall system as a third embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration in the case of performing an independent broadcast (karaoke or the like) in the hotel hall system as a third embodiment of the present invention.

FIG. 5 is a flowchart showing a fourth embodiment of the present invention in which the television receiver C is provided with a channel priority selection function in the system configuration shown in FIG.

[Explanation of symbols]

A ... Knitting device B ... In-house network C ... Television receiver compatible with digital broadcasting 11 ... Antenna 12 ... Analog broadcast receiver 13 ... Video demodulation unit (DEM) 14 ... Voice demodulation unit 15 ... Character multiplex demodulator 161-163 ... MPEG encoder (ENC) 17 ... Screen composition section 18 ... Multiplexing device 19 ... Digital broadcast transmitter 20 ... Screen composition section 21 ... Text input terminal 22 ... Video playback device (DVD, VTR, etc.) 23 ... Video distributor 24 ... Voice distributor

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroyuki Morita             1-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Toshiba headquarters office (72) Inventor Hiroshi Azuma             1-5-11 Shiba, Minato-ku, Tokyo Toshiba Logis             Tix Solutions Co., Ltd. (72) Inventor Shunichi Ueno             1-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Toshiba headquarters office F-term (reference) 5C025 AA02 AA08 AA09 CA09 DA01                 5C056 AA01 BA01                 5C063 AB03 AC01 AC05 DA03 EB37

Claims (15)

[Claims] 1. A signal separating means for separating a video signal from an analog television signal and at least one of a main audio signal, a sub audio signal and a character multiplex signal, and a video signal, a main audio signal separated by this means, Arranging means for arbitrarily combining at least one of the sub-audio signal and the character multiplex signal for each channel, encoding and multiplexing for each channel to convert into a digital broadcasting signal, and transmission for transmitting the digital broadcasting signal obtained by this means A digital broadcasting system comprising: means, and a digital broadcasting receiving means for receiving a digital broadcasting signal transmitted through the means and playing back in a viewing mode by the channel selection. 2. The digital broadcasting according to claim 1, wherein the organizing means includes screen synthesizing means for superimposing characters of the character multiplex signal on a screen of the video signal when combining the video signal and the character multiplex signal. system. 3. The digital broadcasting system according to claim 1, wherein the organization unit includes a screen synthesizing unit for synthesizing an arbitrary text character on a video signal sent to all or some of the channels. 4. A receiving device for receiving an analog television broadcast signal and outputting an analog television signal of a predetermined channel, and inputting the analog television signal obtained by this receiving device to the signal separating means. The digital broadcasting system according to claim 1, wherein 5. A video reproducing device for reproducing and outputting a video signal, an audio signal, and a character multiplex signal recorded on a recording medium in the form of an analog television signal, and the analog television output from this video reproducing device. 2. The digital broadcasting system according to claim 1, wherein a signal is input to the signal separating means. 6. The digital broadcast receiving means comprises a channel designating means for initializing so as to automatically select a designated channel among a plurality of channels multiplexed by the organizing means. 1. The digital broadcasting system according to 1. 7. The digital broadcasting system according to claim 1, wherein the digital broadcasting receiving means is a simplified receiver having no data broadcasting receiving function. 8. The digital broadcasting system according to claim 1, wherein the organization unit transmits the digital broadcasting signal in a frequency band different from that of other digital broadcasting signals transmitted to the transmission unit. 9. The digital broadcasting system according to claim 1, wherein the transmission means is a wired network. 10. The digital broadcasting system according to claim 1, wherein the transmission means is a wireless network. 11. A knitting device for converting an analog television signal including a video signal and at least one of a main audio signal, a sub audio signal, and a character multiplex signal into a digital broadcast signal, wherein the video is generated from the analog television signal. A signal separating means for separating at least one of a signal, a main audio signal, a sub audio signal and a character multiplex signal, and a video signal, a main audio signal, a sub audio signal and a character multiplex signal separated by this means for each channel A plurality of channel-corresponding encoding means for taking in and encoding in arbitrary combination, a multiplexing means for multiplexing respective outputs of the plurality of encoding means, and a multiplexed output of this means for converting into a digital broadcast signal. A digital broadcast organization device comprising: a signal converting / transmitting means for transmitting. 12. When combining the video signal and the character multiplex signal, a screen synthesizing unit for superposing characters of the character multiplex signal on the screen of the video signal is provided, and the output of the screen synthesizing unit is input to one of the encoding units. The digital broadcast composition device according to claim 11, wherein 13. The digital broadcast composition apparatus according to claim 11, further comprising screen synthesizing means for synthesizing screens of arbitrary text characters on a video signal sent to all or some of the encoding means. 14. The digital broadcasting according to claim 11, wherein the signal converting / sending unit sends the digital broadcasting signal in a frequency band different from that of other digital broadcasting signals sent in the same transmission path. Knitting device. 15. A video signal separated from an analog television signal and at least one of a main audio signal, a sub audio signal and a character multiplex signal are arbitrarily combined for each channel, coded, multiplexed and converted into a digital broadcast signal. Thus, at least in a channel in which a video signal and a character multiplex signal are combined, a character of the character multiplex signal is superimposed and coded on the screen of the video signal.