JP2002150700A - Data recording method, data transmission method, and data transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique which records and transmits information (data) at the time of photographing so that it can be easily synchronized with video. SOLUTION: Information (data) at the time of photographing is inserted to a time code used for a VTR. In this insertion method, user bits are divided into a plurality of areas, and data of different types are assigned to divided areas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a data recording method,
More particularly, the present invention relates to a technique for efficiently transmitting a plurality of types of data within a fixed data amount such as a user area of a VTR time code, and for easily synchronizing video and data.

[0002]

2. Description of the Related Art Conventionally, at the time of news gathering, data related to a video has been simultaneously recorded separately from the video. For example, in the case of underwater photographing, information such as water temperature, water depth, longitude and latitude of the photographing position is also recorded at the same time.

[0003] As a recording method, in underwater photography, a cameraman or the like uses an intercom to contact a staff on the ship, and the staff records the information.

[0004]

However, in such a method, recording is troublesome, and since the video is recorded separately from the tape, it is very troublesome to synchronize the video with the data. Was.

Accordingly, the present invention has been made in view of the above-mentioned problems, and has as its object information (data) at the time of photographing.
It is an object of the present invention to provide a technology capable of recording and transmitting a video signal so that it can be easily synchronized with a video.

Another object of the present invention is to provide a technique capable of transmitting a large amount of data by effectively utilizing an area having a limited amount of data, such as a user area of a time code of a VTR. is there.

[0007]

A first aspect of the present invention for achieving the above object is as follows.
The present invention is a data transmission record, wherein a user area of a VTR time code having a predetermined data amount is divided into a plurality of areas, and a plurality of data at the time of video shooting are arranged and recorded in this area. It is characterized by.

According to a second aspect of the present invention, in the first aspect, an ID area for identifying the type of data is provided in a user area of one time code, and different types of data are recorded in a time-division manner. The receiving side determines the type of data based on the identification ID.

According to a third aspect of the present invention, in the second or third aspect, the video and the data inserted in the time code are synchronized based on the time code in which the data is inserted. It is displayed.

A fourth invention for achieving the above object is a data transmission method, comprising a VTR having a predetermined data amount.
The user area of the time code is divided into a plurality of areas, the type of data at the time of video shooting assigned to the divided areas, and a conversion table indicating the correspondence between the data to be transmitted in each area and the code string. A step of determining in advance between the transmitting side and the receiving side, and, on the transmitting side, converting data to be transmitted into a code string according to the conversion table, and arranging the code string in an area corresponding to the data and transmitting the code string. And restoring data from the received code string on the receiving side in accordance with a conversion table corresponding to each area.

According to a fifth aspect of the present invention, in the fourth aspect, an identification ID area for identifying a data type is provided in a user area of one time code, and different types of data are transmitted in a time-division manner. The receiving side determines the type of data based on the identification ID.

According to a sixth aspect of the present invention, in the fourth or fifth aspect, the video and the data inserted in the time code are synchronized based on the time code in which the data is inserted. It is displayed.

According to a seventh aspect of the present invention, there is provided a data transmission system, comprising:
Determining the type of data assigned to the area obtained by dividing the user area of the TR time code, the conversion table indicating the correspondence between the data to be transmitted in each area and the code string, and determining the type of data to be transmitted; Is converted into a code string according to the conversion table, and the transmitting side having means for arranging the code string in an area corresponding to the data and transmitting the data, and converting the data from the received code string according to the conversion table corresponding to each area. And a receiving side having means for restoring the data.

According to an eighth aspect of the present invention, there is provided the seventh aspect of the present invention, in the seventh aspect, means for switching and outputting different data at predetermined time intervals, and determining the type of the output data to determine the type of the output data. Means for arranging the identification ID in a predetermined area of the user area of one time code, and means for converting the data into a code string according to a conversion table, and arranging and transmitting the data in an area other than the area where the identification ID is arranged It has a transmitting side and a receiving side having means for determining the type of data from the identification ID and restoring the data from the code string according to a conversion table corresponding to the determined type.

According to a ninth aspect of the present invention, in the seventh or eighth aspect, the video and the data inserted in the time code are synchronized based on the time code in which the data is inserted. It is characterized by having means for displaying.

A tenth invention for achieving the above object is a data recording method, characterized by arranging and recording data at the time of video shooting on an audio channel of a VTR.

An eleventh invention for achieving the above object is a data recording method, wherein data at the time of video shooting is modulated as audio data and recorded on an audio channel of a VTR.

According to a twelfth aspect of the present invention, in the eleventh aspect of the present invention, an area of an identification ID for identifying the type of data is provided in the data at the time of video shooting, and different types of data are recorded in a time division manner. The receiving side determines the type of data based on the identification ID.

A thirteenth aspect of the present invention to achieve the above object is a data transmission method, wherein a conversion table indicating a correspondence between data at the time of photographing and a code string is previously determined by the transmitting side and the receiving side. On the transmitting side, converting the data to be transmitted into a code sequence according to the conversion table, modulating this code sequence as audio data, recording the data on an audio channel of the VTR and transmitting the data, Demodulates the data recorded on the audio channel,
Restoring data from a code string demodulated based on the conversion table.

According to a fourteenth aspect of the present invention, in the thirteenth aspect, the identification I for identifying the type of data is provided.
A region D is provided, different types of data are transmitted in a time-division manner, and the type of data is determined on the receiving side based on the identification ID.

According to a fifteenth aspect of the present invention, there is provided a data transmission system, comprising: a conversion table indicating a correspondence relationship between data at the time of photographing and a code string; A transmitting unit having means for converting a code string into a code string according to a table, means for modulating the converted code string as audio data, and recording and transmitting the data on an audio channel of a VTR; It has a conversion table indicating the correspondence, means for demodulating data recorded in an audio channel, and means for restoring data at the time of shooting the demodulated code string based on the conversion table.

According to a sixteenth invention for achieving the above object, in the fifteenth invention, the identification I for identifying the type of data is provided.
A region D is provided, different types of data are transmitted in a time-division manner, and the type of data is determined on the receiving side based on the identification ID.

[0023]

Embodiments of the present invention will be described.

First, a recording and transmission method will be described.

Normally, a time code used for a VTR has an area called a user bit which can be freely defined by a user. Therefore, if information (data) at the time of shooting is inserted into the user bit, the video and the information at the time of shooting can be easily synchronized. However, the user bits are as small as 4 bytes in total, and many types of data are recorded as they are. It cannot be transmitted. Therefore, in the present invention, the user bits are divided into a plurality of regions, and different types of data are assigned to the divided regions.

Hereinafter, a specific description will be given. In the description of the present embodiment, underwater photographing will be described as an example, and data of a water temperature and a water depth at a photographing position will be described as an example of data to be transmitted.

FIG. 1 is a diagram for explaining the present embodiment.

As shown in FIG. 1, 4 bytes of user bits are divided into eight areas (each area is 4 bits) and areas A to H. The area A is the water temperature (0.1
C), area B is water temperature (about 1 ° C.), area C is water temperature (10 ° C.).
C), area D is water depth (about 1 m), area E is water depth (10 m).
m), area F is water depth (about 100 m), area H is identification I
D data is allocated. The area G is undefined as a spare.

Further, in each area, the meaning of a code string defined by 4 bits is determined in advance. For example, in the area A of the water temperature (about 1 ° C.), the code string “0000” is changed to “0 ° C.
“, Code string“ 0001 ”is changed to“ 1 ° C. ”, code string“ 001
0 is “2 ° C.”, code string “0011” is “3 ° C.”, code string “0100” is “4 ° C.”, and code string “0101” is “5”.
° C, code string “0111” is changed to “6 ° C”, code string “100
0 is expressed in advance as “7 ° C.”, the code sequence “1001” is expressed as “8 ° C.”, and the code sequence “1010” is expressed as “9 ° C.”. The tables are shown in FIGS.

Subsequently, the data of the water temperature and the water depth obtained from the outside, such as a sensor, is converted into the above-mentioned rule (conversion table).
Is converted to a code string according to For example, the water temperature "13.5
For example, the case where the water temperature is “13.5 ° C.” and the water temperature is “01.
10 ”is arranged, and“ 001 ”indicating 3.0 ° C. is set in the area B.
1 ”, and“ 0001 ”indicating 10 ° C.
Is arranged. For the water depth “123 m”, “0011” indicating 3 m is arranged in the area D, “0010” indicating 20 m is arranged in the area E, and “0001” indicating 100 m is arranged in the area F. In the area H, “0000” indicating that the data is water temperature and water depth is arranged.

On the transmitting side, as described above, a plurality of types of data (in this description, water temperature and water depth) are transmitted in user bits.

The receiving side analyzes the data carried in the user bits and restores the data according to the rules described above.

For example, “0110” is arranged in the area A, “0011” is arranged in the area B,
“0001” is arranged in the region C, “0011” is arranged in the region D, and “001” is arranged in the region E.
When “0” is arranged, “0001” is arranged in the area F, and “0000” is arranged in the area G, it is recognized as water temperature and water depth data from “0000” in the area G, From the data of the area A to the area C, the water temperature “1”
3.5 ° C. ”, and from the data in the area D to the area F,
The water depth "123m" is restored.

According to this method, a plurality of types of data can be transmitted, and since the data is synchronized with the time code, the video (scene) and the information (water temperature, water depth) of the video (scene) can be accurately calculated. And can be matched.

Next, a system for realizing the above method will be described.

FIG. 9 is a block diagram of the first embodiment.

In FIG. 9, 1 is an underwater camera, 2 is a water temperature sensor, 3 is a water depth sensor, 4 is a first converter, 5 is a VTR, and 6 is a second converter. And 7 is an editor.

The operation in such a configuration will be described.

The temperature from the water temperature sensor 2 and the water depth from the water depth sensor 3 are input to the converter 4.

The converter 4 encodes the water temperature data and the water depth data in accordance with the conversion tables shown in FIGS. 2 to 8 described above. Then, the encoded data is represented by V
Output to TR5.

The VTR 5 receives the video from the underwater camera 1 and the data from the converter 4 and records the video on the video channel and the data on the user bits of the time code.

Subsequently, at the time of reproduction, the VTR 5 reproduces the tape and outputs video and audio to the editor 7. On the other hand, it outputs the user code data of the time code to the converter 6. In the converter 6, FIG.
The data is restored according to the conversion table shown in FIG.

The editor 7 captures data (water temperature and water depth) synchronized with the time code and captures the data on a video.

Next, another embodiment will be described.

In the embodiment described above, a predetermined type of data is transmitted over the entire time. In other embodiments, the type of data to be transmitted is changed for each time. Features. In the description of the other embodiments, the description of the same configuration as that of the above-described embodiment will be omitted.

In another embodiment, the data to be transmitted is transmitted in addition to the water temperature and water depth data described in the above embodiment, and the longitude and latitude of the photographing position are transmitted.

As the transmission method, data of the water temperature and the water depth are obtained at predetermined time intervals (for example, every minute).
Transmission is performed by switching between longitude data and latitude data. Therefore, as shown in FIGS.
For eight regions (each region is 4 bits), regions A to H, region A is longitude or latitude (about 1 second), region B is longitude or latitude (about 10 seconds), and region C is longitude or latitude (1 second). Area D is longitude or latitude (tenths), area E is longitude or latitude (about one degree), area F is longitude or latitude (about ten degrees)), area G is longitude (about 100 degrees). , The region H is the identification I
D data is allocated.

Further, in each area, the meaning of a code string represented by 4 bits is determined in advance. For example, in the area A of longitude or latitude (about one second), the code string “00”
00 for “0 seconds”, code string “0001” for “1 second”, code string “0010” for “2 seconds”, code string “0011” for “3 seconds”, code string “0100” for “4 seconds” “, Code string“ 0
101 ”for“ 5 seconds ”, the code string“ 0111 ”for“ 6 seconds ”,
The code string “1000” is determined in advance to represent “7 seconds”, the code string “1001” to “8 seconds”, and the code string “1010” to “9 seconds”. The meanings of the code strings in other areas are shown in FIGS.

Subsequently, the latitude and longitude data obtained from the outside is converted into a code string according to the above rules. For example, when the latitude is "36 degrees 25 minutes 47 seconds", "1000" indicating 7 seconds is arranged in the area A, "0101" indicating 40 seconds is arranged in the area B, and the area C is arranged.
"0110" indicating 5 minutes is arranged in
“0010” indicating 0 minutes is arranged, “0111” indicating 6 degrees is arranged in the area E, “0011” indicating 30 degrees is arranged in the area F, and “00” indicating latitude is arranged in the area H.
01 "is arranged.

Each of the data expressed as described above is switched and transmitted at predetermined time intervals (for example, every minute) in the order of water temperature and water depth data, latitude data, and longitude data.

On the receiving side, the identification ID is read from the area H of the transmitted data, and which data is determined,
Data is restored using a conversion table suitable for the type of data.

In this way, many types of data are transmitted within a limited data amount.

Next, an example of a system for realizing another embodiment described above will be described. FIG. 27 is a block diagram of an example of a system for realizing another embodiment. What is different from the system described above? A position sensor (latitude) 10 and a position sensor (longitude) 11 are further provided, and a water temperature sensor 2, a water depth sensor 3, a position sensor (latitude) 10, and a position sensor (longitude) 11 are provided at predetermined time intervals. A switch 12 for switching and inputting data is provided. Further, the converter 4 and the converter 6 convert the data into a code string using a conversion table according to the type of the data.

Further, another embodiment will be described.

In each of the embodiments described above, the data at the time of photographing is arranged in the user area of the time code. However, in the present embodiment, the data at the time of photographing is modulated and arranged in the audio channel. .

For example, data is arranged as shown in FIG. 28, and the meaning of the arranged data is determined in advance as a conversion table between the transmitting side and the receiving side in the same manner as in the above-described embodiment (see FIG. 28). 2 to FIG. 8). Then, the data at the time of photographing is encoded according to a predetermined conversion table, and the encoded data is modulated and recorded on an audio channel. The transmission speed is, for example, 2400 bps.

On the receiving side, the data of the audio channel is demodulated, and the demodulated code string is restored to the data at the time of shooting according to the conversion table.

FIG. 29 is a system diagram for realizing the above method.

The difference from the above-described embodiment is that a modulator 20 for modulating the data output from the converter 4 as audio data and a demodulator 21 for demodulating the data output from the audio channel of the VTR 5 are provided. It is a point. Other configurations are similar to those of the above-described embodiment.
Description is omitted. Since there are usually a plurality of audio channels, the data at the time of shooting is recorded on an audio channel different from the audio channel to which the sound at the time of shooting is input.

[0060]

According to the present invention, it is possible to transmit many types of data even in a region of a predetermined data amount such as a user bit of a time code,
Further, data synchronized with the video can be obtained.

Further, by transmitting data to be transmitted in a time-division manner, more types of data can be transmitted.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of the present invention.

FIG. 2 is a diagram for explaining a conversion table used in the embodiment of the present invention.

FIG. 3 is a diagram for explaining a conversion table used in the embodiment of the present invention.

FIG. 4 is a diagram for explaining a conversion table used in the embodiment of the present invention.

FIG. 5 is a diagram for explaining a conversion table used in the embodiment of the present invention.

FIG. 6 is a diagram for explaining a conversion table used in the embodiment of the present invention.

FIG. 7 is a diagram for explaining a conversion table used in the embodiment of the present invention.

FIG. 8 is a diagram for explaining a conversion table used in the embodiment of the present invention.

FIG. 9 is a block diagram of an embodiment of the present invention.

FIG. 10 is a diagram for explaining another embodiment of the present invention.

FIG. 11 is a diagram for explaining another embodiment of the present invention.

FIG. 12 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 13 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 14 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 15 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 16 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 17 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 18 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 19 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 20 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 21 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 22 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 23 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 24 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 25 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 26 is a diagram for explaining a conversion table used in another embodiment of the present invention.

FIG. 27 is a block diagram of another embodiment of the present invention.

FIG. 28 is a diagram for explaining another embodiment of the present invention.

FIG. 29 is a block diagram of another embodiment of the present invention.

[Explanation of symbols]

 1 Underwater camera 2 Water temperature sensor 3 Water depth sensor 4,6 Converter 5 VTR 7 Editor

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (Reference) H04N 5/7826 H04N 5/782 Z 5/91 5/91 ZLF term (Reference) 5C018 AC08 FA01 FB05 5C053 FA06 FA21 GB01 HA40 JA02 JA22 JA30 KA05 LA01 LA20 5D044 AB07 BC01 CC03 DE28 DE33 DE39 DE52 EF05 5K028 EE03 MM08 MM16

Claims (16)

[Claims] 1. A data recording method, comprising dividing a user area of a VTR time code having a predetermined data amount into a plurality of areas, and arranging and recording a plurality of pieces of data at the time of video shooting in this area. A data recording method, characterized in that: 2. An area of an identification ID for identifying a type of data is provided in a user area of one time code, different types of data are recorded in a time-division manner, and a type of data is determined on the receiving side based on the identification ID. The data recording method according to claim 2, wherein the data recording is performed. 3. The data recording according to claim 2, wherein the video and the data inserted in the time code are synchronously displayed based on the time code into which the data is inserted. Method. 4. A data transmission method, comprising: dividing a user area of a VTR time code having a predetermined data amount into a plurality of areas; A step of previously determining, on the transmitting side and the receiving side, a conversion table indicating the correspondence between the data to be transmitted in the area and the code string; and, on the transmitting side, coding the data to be transmitted in accordance with the conversion table. Converting the data into a sequence, arranging the code sequence in an area corresponding to the data, and transmitting the data; and, on the receiving side, restoring data from the received code sequence in accordance with a conversion table corresponding to each area. A data transmission method, comprising: 5. An identification ID area for identifying a data type is provided in a user area of one time code, different types of data are transmitted in a time-division manner, and a data type is determined on the receiving side based on the identification ID. The data transmission method according to claim 4, wherein: 6. The data transmission according to claim 5, wherein the video and the data inserted in the time code are displayed synchronously based on the time code in which the data is inserted. Method. 7. A data transmission system, comprising: a type of data allocated to an area obtained by dividing a user area of a VTR time code having a predetermined data amount; and data to be transmitted in each area and a code string. A conversion table indicating the correspondence, and means for determining the type of data to be transmitted, converting the data into a code string according to the conversion table, arranging the code string in an area corresponding to the data, and transmitting the code string. A data transmission system comprising: a transmission side; and a reception side having means for restoring data from a received code string according to a conversion table corresponding to each area. 8. A means for switching and outputting different data at predetermined time intervals, and a means for judging a type of the output data and arranging an identification ID of the data in a predetermined area of a one-time code user area. A transmitting side having means for converting the data into a code string in accordance with a conversion table and transmitting the data by arranging the data in an area other than the area where the identification ID is allocated; and determining the type of data from the identification ID. The data transmission system according to claim 7, further comprising: a receiving side having means for restoring data from the code string according to the conversion table corresponding to the type. 9. The apparatus according to claim 7, further comprising means for synchronously displaying the video and the data inserted in the time code on the basis of the time code in which the data is inserted. Data transmission system. 10. A data recording method, comprising arranging and recording data at the time of video shooting on an audio channel of a VTR. 11. A data recording method, comprising: modulating data at the time of video shooting as audio data;
A data recording method characterized by recording on an audio channel. 12. An area of an identification ID for identifying the type of data is provided in data at the time of video shooting, data of different types are recorded in a time-division manner, and the type of data is determined on the receiving side based on the identification ID. The data recording method according to claim 11, wherein: 13. A data transmission method, comprising: a step of preliminarily determining, on a transmitting side and a receiving side, a conversion table indicating a correspondence relationship between data at the time of photographing and a code string; Converting the data to be encoded into a code sequence according to the conversion table, modulating the code sequence as audio data, recording and transmitting the data on a VTR audio channel, and demodulating the data recorded on the audio channel on the receiving side. And restoring data from a code string demodulated based on the conversion table. 14. An identification ID area for identifying a type of data is provided, different types of data are transmitted in a time-division manner, and a data type is determined on the receiving side based on the identification ID. Item 14. The data transmission method according to Item 13. 15. A data transmission system, comprising: a conversion table indicating a correspondence relationship between data at the time of photographing and a code string; and means for converting data at the time of photographing to be transmitted into a code string according to the conversion table. A transmitting side having means for modulating the converted code sequence as audio data, recording the data on an audio channel of a VTR and transmitting the data, a conversion table indicating a correspondence relationship between data at the time of shooting and the code sequence, A data transmission system comprising: means for demodulating data recorded in a channel; and means for restoring data at the time of shooting the demodulated code string based on the conversion table. 16. An identification ID area for identifying a type of data is provided, different types of data are transmitted in a time-division manner, and the type of data is determined on the receiving side based on the identification ID. Item 16. A data transmission system according to item 15.