JP2003060600A - Data transmitting method and transmitter capable of using this method, and data receiving method and receiver capable of using this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome the problem wherein a bandwidth available for a digital radio broadcasting has not a margin enough to allow endless data transmission. SOLUTION: A data stream for broadcasting is formed into a multiplexed configuration with a plurality of logical layers. These layers are divided into a main broadcast layer for transmitting data for a so-called main broadcasting and a sub-broadcast layer used for a so-called data broadcasting. The data of music, text, still pictures, motion pictures, voice, etc., are independently transmitted to each of the plurality of sub-broadcast layers. If there is an idle time having no data to be transmitted any of the layers, the bandwidth of the layer is allocated to another layer to utilize the bandwidth effectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission method and device and a data reception method and device. The present invention particularly relates to a technique for transmitting a data stream for broadcasting.

[0002]

2. Description of the Related Art In recent years, the form of television broadcasting and radio broadcasting is shifting from analog to digital. CS
BS digital broadcasting has started following digital broadcasting, and within a few years terrestrial television broadcasting and terrestrial radio broadcasting are about to be digitized. One of the major characteristics of digital broadcasting is so-called data broadcasting. While main broadcasting contents are sent as main broadcasting, accompanying data is sent as sub-channels to add value to the program. Although there is text broadcasting as a similar technology in analog broadcasting, data broadcasting in digital broadcasting is easier to enrich because it can simultaneously transmit multiple types of data regardless of media type such as video, still image, voice, and text. .

Recently, so-called Internet broadcasting using the Internet as a broadcasting medium has been attracting attention in the background of the broadband era. In the past, Internet broadcasting only delivered a limited amount of content in a narrow bandwidth, so there was not much competition with television and radio broadcasting. It has come to be regarded as one of the broadcasting means.

[0004]

It is said that the amount of data that can be transmitted is expanded several times by shifting from analog broadcasting to digital broadcasting. However, since a plurality of broadcasters share a band and realize more channels, the band is not always sufficient to allow unlimited data transmission. Therefore, in order to fully utilize the band, it is essential to improve the efficiency of data transmission. Such a technology eventually leads to the enhancement of broadcast contents, and is important for acquiring many viewers.

The present inventor has made the present invention based on the above recognition, and an object thereof is to provide a technique for improving the data transmission efficiency.

[0006]

One aspect of the present invention relates to a data transmission method. In this method, a data stream is formed by multiplexing layers that are logical data transmission paths, and a data package having an individual purpose as a content is sent to each of the multiplexed layers and one of the layers is transmitted. In (1), the bandwidth of a layer is dynamically changed according to the situation by expanding the bandwidth of another layer within the blank period in which there is no data package to be flown to the bandwidth of that layer.

[0007] The term "data stream" is used herein to mean a layer of data having a multi-layered structure placed in a static state in order to describe the structure of layers. The same word is appropriately used for the transmission data placed in the dynamic state, which means the meaning. In this aspect, a data stream for broadcasting is mainly shown.

[0008] The "data package" includes, for example, data having a specific purpose generated in a different format such as music, voice, still image, moving image, and text, and information indicating the contents of the data package. It is a set and has a cohesiveness as broadcast content. At the time of broadcasting, this data package is sent to each layer by putting it in a sending buffer or the like. The "blank period" mainly occurs in the layer where this transmission buffer is empty.
The data stream may have a multi-layer structure for each purpose by flowing the data package for each layer according to the purpose.

Another aspect of the present invention also relates to a data transmission method. In this method, a data stream is formed by multiplexing layers that are logical data transmission paths, and a data package having an individual purpose as a content is sent to each of the multiplexed layers and one of the layers is transmitted. In (1), the band of the layer is dynamically changed according to the situation by integrating the layer with another layer in a blank period when there is no data package to be sent.

Yet another aspect of the present invention also relates to a data transmission method. In this method, a data stream is formed by multiplexing layers that are logical data transmission paths, and a data package having an individual purpose as a content is sent to each of the multiplexed layers and one of the layers is transmitted. In, in the blank period in which there is no data package to be sent, at least a part of the data package to be originally sent to another layer is made to flow, thereby dynamically changing the band of the layer according to the situation.

Yet another aspect of the present invention relates to a data transmission device. This device has a layer setting unit that stores the band of each defined layer and a separate purpose as content in order to configure a data stream in a form in which layers that are logical data transmission lines are multiplexed. A package generation unit that generates multiple data packages, an organization processing unit that allocates the data packages to each layer to be multiplexed, and the bandwidth of that layer is limited to the blank period when there is no data package to flow in any layer. And a band adjusting unit that performs a process of expanding the bandwidth of another layer. The “data transmission device” does not necessarily need to integrally have transmission means such as an antenna,
In that sense, it does not prevent realization as a “data editing device”. Also, it may be realized in the form of a system configured by combining a plurality of devices having individual functions,
It does not need to be integrally configured as a whole. The same applies to the following data transmission devices.

"Generation" of a data package indicates a general process for grouping a plurality of files into one data package. For example, a process for generating information for defining a data package and a data transmission preprocess. It also includes the process of copying or transferring the package. “Organization processing” for allocating data packages mainly means data organization performed as a preprocessing of data multiplexing.

Yet another aspect of the present invention also relates to a data transmission device. This device has a layer setting unit that stores the band of each defined layer and a separate purpose as content in order to configure a data stream in a form in which layers that are logical data transmission lines are multiplexed. A package generation unit that generates a plurality of data packages, an organization processing unit that allocates a data package to each layer to be multiplexed, and in any layer, in a blank period when there is no data package to be flowed, that layer is set to another layer. And a band adjusting unit to be integrated.

Yet another aspect of the present invention also relates to a data transmission device. This device has a layer setting unit that stores the band of each defined layer and a separate purpose as content in order to configure a data stream in a form in which layers that are logical data transmission lines are multiplexed. A package generation unit that generates multiple data packages, an organization processing unit that allocates data packages to each layer to be multiplexed, and should be originally allocated to other layers during a blank period when there is no data package to be allocated in any layer. A band adjusting unit that performs a process of allocating at least a part of the data package.

Yet another aspect of the present invention relates to a data receiving method. This method detects a layer whose bandwidth has been expanded within the bandwidth of any layer in a data stream configured by multiplexing layers that are logical data transmission paths, and After considering the above, each layer including a layer whose bandwidth is dynamically adjusted according to the situation is recognized, and a data package having an individual purpose as content is extracted from each of the recognized layers.

Yet another aspect of the present invention also relates to a data receiving method. This method detects a layer integrated with any layer in a data stream configured by multiplexing layers that are logical data transmission paths, and considers the result of the detection before Each layer including a layer whose bandwidth is dynamically adjusted according to the above is recognized, and a data package having an individual purpose as content is extracted from each of the recognized layers.

Yet another aspect of the present invention also relates to a data receiving method. This method recognizes each layer in a data stream formed by multiplexing layers that are logical data transmission paths, and extracts a data package having a specific purpose as content from each recognized layer. , Detects a layer in which at least a part of the data package that should be originally passed to another layer is detected from the recognized layer, and combines the data extracted from the detected layer with the data package extracted from the original layer By doing so, the content is reconstructed into the intended state.

Yet another aspect of the present invention relates to a data receiving device. This device, in a data stream configured in a form of multiplexing layers that are logical data transmission paths, an adjustment detection unit that detects a layer whose band is expanded within the bandwidth of any layer, A layer recognizing unit that recognizes each layer including a layer whose bandwidth is dynamically adjusted according to the situation in consideration of the detection result, and a data package having an individual purpose as content from each of the recognized layers. And a package extraction unit for extracting The “data receiving device” does not necessarily need to integrally have a receiving unit such as an antenna, and in that sense, it does not prevent realization as a “data reproducing device”. The same applies to the following data receiving devices.

Yet another aspect of the present invention also relates to a data receiving device. This device considers the detection result and an adjustment detection unit that detects a layer integrated with any layer in a data stream configured by multiplexing layers that are logical data transmission paths. The above includes a layer recognizing unit that recognizes a layer whose bandwidth is dynamically adjusted according to the situation, and a package extracting unit that extracts a data package having an individual purpose as content from each of the recognized layers. .

Yet another aspect of the present invention also relates to a data receiving device. This device includes a layer recognition unit that recognizes each layer in a data stream formed by multiplexing layers that are logical data transmission paths, and data that has a specific purpose as content from each recognized layer. A package extraction unit that extracts a package, an adjustment detection unit that detects, from the recognized layer, a layer in which at least a part of the data package that should originally be passed to another layer is detected, and the data extracted from the detected layer And an adjustment processing unit that combines the data with the data package extracted from the original layer.

Yet another aspect of the present invention relates to a computer program. This program is a process for detecting a layer whose band is expanded within the bandwidth of any layer in a broadcast data stream configured by multiplexing layers that are logical data transmission paths. , A process of recognizing each layer including a layer whose bandwidth is dynamically adjusted according to the situation in consideration of the result of detection, and a data package having an individual purpose as broadcast content from each of the recognized layers And causing the computer to execute the process of extracting.

Yet another aspect of the present invention also relates to a computer program. This program considers the process of detecting the layer integrated with any layer in the broadcast data stream configured by multiplexing layers that are logical data transmission paths, and the detection result. Then, the computer executes the process of recognizing the layer whose bandwidth is dynamically adjusted according to the situation and the process of extracting the data package having the individual purpose as the broadcast content from each of the recognized layers. Let

Yet another aspect of the present invention also relates to a computer program. This program recognizes each layer in a data stream for broadcasting that is configured by multiplexing layers that are logical data transmission paths, and from each of the recognized layers, has an individual purpose as broadcast content. The process of extracting the data package that has, the process of detecting the layer in which at least a part of the data package that should originally be passed to another layer from the recognized layer, and the data extracted from the detected layer are originally detected. And causing the computer to execute the process of combining with the data package extracted from the layer.

Yet another aspect of the present invention relates to a transmission medium. In this transmission medium, the data stream is separated into a plurality of layers so that the broadcast data stream is formed by multiplexing layers that are logical data transmission paths, and the broadcast content is provided in each of the plurality of layers. Assigned a data package with a distinct purpose as
In any of the layers, data having a structure in which the bandwidth of another layer is expanded within the blank period when there is no data package to be allocated is limited to the bandwidth of the layer.

Yet another aspect of the invention also relates to a transmission medium. In this transmission medium, the data stream is separated into a plurality of layers so that the broadcast data stream is formed by multiplexing layers that are logical data transmission paths, and the broadcast content is provided in each of the plurality of layers. A data package having a specific purpose is assigned as, and in a blank period in which there is no data package to be assigned in any layer, that layer transmits data having a structure integrated with other layers.

Yet another aspect of the present invention also relates to a transmission medium. In this transmission medium, the data stream is separated into a plurality of layers so that the broadcast data stream is formed by multiplexing layers that are logical data transmission paths, and the broadcast content is provided in each of the plurality of layers. Has a structure in which at least a part of the data packages to be originally assigned to other layers is assigned in a blank period in which there is no data package to be assigned in any layer. Transmit data.

Any combination of the above components,
Also, the components and expressions of the present invention, which are mutually replaced among methods, devices, computer programs, recording media storing computer programs, data structures, and the like,
It is effective as an aspect of the present invention.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) In the present embodiment, a layer which is a plurality of logical data transmission paths is provided in a data stream for terrestrial digital radio broadcasting, and broadcasting is performed for each layer. Assign content. As a general rule, broadcast contents are repeatedly transmitted by the carousel method for each layer, but when there is a blank period in which there is no broadcast content to be transmitted in a certain layer, the band of that layer is allocated to another layer during that period. As a result, the entire band is efficiently used so as not to be wasted.

FIG. 1 shows a logical structure of a broadcast data stream. The entire band assigned to broadcasting in this embodiment is 680 kbps, and the band is MP
A data stream is sent according to the MPEG2-TS (Transport Stream) method, which is one of the EG (Moving Picture Experts Group) standards. This data stream is composed of several logical layers as shown. The layer includes one main broadcast layer and a plurality of sub broadcast layers. However, the numbers and configurations of the main broadcast layer and the sub broadcast layer are arbitrary, and are left to the side that determines the broadcast content.

In the main broadcast layer, so-called main broadcast data in digital radio broadcast flows. The band of this layer is 128 kbps, and the data format is AAC.
(Advanced Audio Coding). Data for so-called data broadcasting flows in the sub-broadcast layer. This sub-broadcast layer is further subdivided into several layers, and data such as music, texts, still images, moving images, and audio are sent to each. For example, the band of the layer used for transmitting the music data is 270 kps.

FIG. 2 is a functional block diagram showing the structure of the broadcasting system. The broadcasting system 10 includes a broadcasting server 14
And a plurality of broadcast receiving terminals 12. Broadcast server 1
4 transmits a broadcast data stream by terrestrial waves, and the plurality of broadcast receiving terminals 12 receive this. Broadcast server 1
Reference numeral 4 corresponds to the "data transmitting device" in the claims, and the broadcast receiving terminal 12 corresponds to the "data receiving device" in the claims.

Broadcast server 14 and broadcast receiving terminal 12
In terms of hardware, it can be realized by an element such as a CPU of a computer, and in terms of software, it can be realized by a program having a data transmitting / receiving function.
2 to 4 depict functional blocks realized by the cooperation. Therefore, these functional blocks can be realized in various ways depending on the combination of hardware and software. The broadcast server 14 may include a transmitting antenna, and the broadcast receiving terminal 12 may include
It may be a personal computer including a receiving antenna, a dedicated digital radio, a mobile terminal, a mobile phone, or the like.

FIG. 3 is a functional block diagram showing the structure of the broadcast server. The broadcast server 14 includes the content generation unit 2
0, a stream generation unit 22, a transmission processing unit 24, and a transmission setting unit 26. The content generation unit 20 generates broadcast content, and the transmission setting unit 26 sets the stream configuration. Based on the setting, the stream generation unit 22
Generates a stream, and the transmission processing unit 24 transmits the stream to the broadcast receiving terminal 12.

The content generation unit 20 includes a voice input unit 2
8, an audio mixing unit 30, a broadcast data storage unit 32, and a package generation unit 33. The voice input unit 28 inputs the voice of a disc jockey or the voice of a song played in a broadcast. The audio mixing unit 30 mixes the audio input in a plurality of tracks and sends the audio to the stream generation unit 22. The broadcast data storage unit 32 stores data such as music, still images, moving images, texts, and voices that form broadcast contents. The package generation unit 33 generates a plurality of data packages having individual purposes as broadcast contents. A data package is mainly contents that should be transmitted by data broadcasting.For example, a music package that contains music data and an image of an album jacket, a weather forecast package that contains a weather map image and weather forecast text, etc. is there.

The stream generation unit 22 includes an encoding processing unit 3
4 and a multiplexing processing unit 36. Encoding processing unit 34
Encodes the data as needed. For example, the music data may be converted into a format such as AAC, or a large amount of data may be compressed. The multiplexing processing unit 36 allocates a data package to each layer based on the setting determined by the transmission setting unit 26 and generates a data stream in which the data package is multiplexed.

The transmission setting unit 26 includes a layer setting unit 38, a composition processing unit 40, a band adjusting unit 42, and an instruction receiving unit 44.
including. The instruction receiving unit 44 receives an instruction regarding the broadcast schedule from the operator of the broadcast server 14. The operator is, for example, an operator of a broadcasting device, a producer of a program, a disc jockey, or the like. Instruction receiving unit 44
May receive an instruction from the operator regarding the start of transmission of a data package that should be originally assigned in any layer (hereinafter referred to as “take”). As a general rule, the broadcasting is advanced according to a preset schedule, but in the case of live broadcasting, for example, by issuing a take depending on the situation, the music can be broadcast at an appropriate timing.

The layer setting section 38 stores the band of each layer. The band of each layer may be based on the setting defined in advance by the operator, or may be automatically set by the layer setting unit 38 according to the capacity of each data package to be transmitted at the same time. The plurality of layers include one main broadcasting layer for intermittently transmitting the main broadcasting content and a plurality of sub-broadcasting layers for transmitting the auxiliary broadcasting content at arbitrary timings. Layer setting unit 38
Secures a layer for transmitting the definition regarding the bandwidth of each layer.

Data packages of different media types are assigned to the plurality of sub-broadcast layers, and the layer setting unit 38 stores the bandwidth of each layer in correspondence with the plurality of media types. For example, the second layer has music data, and the third layer has still image data.

The organization processing section 40 allocates a data package to each layer to be multiplexed. For example, the stream data generated by the audio mixing unit 30 is assigned to the main broadcast layer, and the data package generated by the package generation unit 33 is assigned to at least one of the plurality of sub broadcast layers by the carousel method. However, the allocation of the data package to the sub-broadcast layer is not limited to the carousel method, and may be allocated at any timing according to a predetermined schedule.

The band adjusting unit 42 maintains the band of the main broadcast layer fixed and dynamically changes the band among a plurality of sub broadcast layers. For example, in any of the sub-broadcast layers, the bandwidth of the other sub-broadcast layer is expanded within the blank period when there is no data package to be streamed to the limit of the bandwidth of the layer. As a result, the free time of the band can be reduced and the overall transmission efficiency can be improved. Here, when a take is issued in a layer while the band adjusting unit 42 is expanding the band of any sub-broadcast layer, the band of the layer is returned to the state before adjustment and the original data package is restored. Interrupt.

FIG. 4 is a functional block diagram showing the structure of the broadcast receiving terminal. The broadcast receiving terminal 12 includes the reception processing unit 5
0, a stream recognition unit 52, a reproduction processing unit 54, a speaker 56, and a monitor 58. The reception processing unit 50 receives the data stream transmitted from the broadcast server 14, the stream recognition unit 52 separates each layer forming the data stream, and the reproduction processing unit 54 expands the data package included in each layer. Reproduce. The reproduced sound is output to the outside through the speaker 56, and the reproduced image or text is output to the outside through the monitor 58.

The stream recognition section 52 is a layer recognition section 6
0, an adjustment detection unit 62, a separation processing unit 64, and a decoding processing unit 66. The layer recognition unit 60 recognizes each layer based on the definition that defines the band of each layer transmitted from the broadcast server 14. The layer recognition unit 60 fixedly recognizes the band of the main broadcast layer and recognizes the bands of the plurality of sub broadcast layers.

The adjustment detector 62 detects a layer whose band is expanded within the bandwidth of any layer. When such a layer is detected, the layer recognition unit 60
In consideration of the detection result, the layer whose band is dynamically adjusted among the plurality of sub broadcast layers is recognized according to the broadcast situation. When the bandwidth of each layer is adjusted, for example, when a buffer (not shown) is allocated for each layer, the buffer allocation may be changed in accordance with the dynamic adjustment of each layer. For example, when CPU power (not shown) is allocated to each process for each layer, the CPU power allocation may be changed in accordance with the dynamic adjustment of each layer. For example, when filtering each content for each layer, the filtering process may be interlocked with the dynamic adjustment of each layer.

The separation processing section 64 separates the data stream into layers. The decoding processing unit 66 processes conversion of data format and decoding of compressed data as necessary.

The reproduction processing unit 54 includes an adjustment processing unit 68, a package extraction unit 70, a main broadcast reproduction unit 72, and a data broadcast reproduction unit 74. The package extraction unit 70 extracts a data package from at least one of the recognized sub-broadcast layers. The adjustment processing unit 68 causes the package extraction unit 70 to extract the data package in a form in which the adjustment is taken into consideration when the layer in which the band is dynamically adjusted is included. The main broadcast reproducing unit 72 reproduces the data flowing in the main broadcast layer. The data broadcast reproduction unit 74 reproduces the content included in the data package flowing through the sub broadcast layer.

FIG. 5 shows each layer when band adjustment is performed on the designated layer. As shown in the figure, when a blank period occurs in the second layer, the bandwidth of the third layer is expanded within the bandwidth of the layer. Although the main broadcast is assigned to the first layer and the music data package is assigned to the second layer, the transmission timing of the music data is linked to the timing of playing the music in the main broadcast. Further, since the music data of the second layer is compressed and encoded, the transfer time of the music is shorter than that of the first layer. However, in the case of a compression rate of about double speed, it is difficult to transfer twice in the second layer while one song is flowing in the first layer, so the carousel method is not adopted. In such a case, a blank period with a wide bandwidth and a relatively high frequency as shown in this figure is likely to occur.

Here, the band adjusting unit 42 may fix the layer for which the blank period is detected to a specific layer. This is because it is not efficient to detect and adjust from a layer with a short blank period or a layer with a low blank frequency. Further, even if there is a high frequency of blanks, if the band is narrow, fine layer adjustment frequently occurs, which may rather reduce efficiency. Therefore, for example, the layer for which the blank period is detected may be fixed to a layer having a wide bandwidth or a layer corresponding to a specific media type.

(Second Embodiment) In the present embodiment,
The band adjustment unit 42 in FIG. 2 differs from the first embodiment in that a layer is integrated with another layer in a blank period in which there is no data package to be transmitted in any layer. The adjustment detection unit 62 in FIG. 3 detects a layer integrated with any layer.

FIG. 6 shows a state in which a plurality of layers are integrated in the second embodiment. For example, when a blank period occurs in the second layer having a band of 270 kbps, 128
398k integrated with the third layer having a bandwidth of kbps
Set the band to bps. This band is defined as the third layer.

(Third Embodiment) In the present embodiment,
The band adjustment unit 42 in FIG. 2 performs the process of allocating at least a part of the data package to be originally allocated to another layer in a blank period in which there is no data package to be allocated in any layer. Different from the embodiment. Adjustment detection unit 62 in FIG.
Detects, from the recognized layer, a layer in which at least a part of the data package which should be originally passed to another layer is passed. The adjustment processing unit 68 combines the data extracted from the detected layer with the data package extracted from the original layer.

FIG. 7 shows a state in which a part of the data package flowing to another layer is flowed to the layer in which the blank period occurs in the third embodiment. For example, when a blank period occurs in the second layer, a part of the data package to be distributed to the fifth layer is divided and distributed to the second layer. As a result, the band of the fifth layer is substantially expanded.

(Fourth Embodiment) In the present embodiment,
This is different from the first to third embodiments in that the band of the vacant layer is preferentially assigned to a specific layer when a blank period occurs in any of the layers.

FIG. 8 shows a state where the band is preferentially adjusted for a specific layer. In the present embodiment, the band adjustment unit 42 of FIG. 2 preferentially adjusts the band of the layer in which the blank period has occurred to the layer of the other layers to which the data package of the maximum data amount is allocated. For example, the data package assigned to the fourth layer has a larger amount of data than other layers, so that the assignment is prioritized as shown in the figure.

The band adjusting unit 42 of FIG. 2 preferentially adjusts the band of the layer in which the blank period has occurred to the layer of the other layers to which the data package of the specific media type is allocated. Good. For example, when “image data has priority” is set, the third layer has priority. For example, when a data package covering a plurality of media types is assigned to one layer, the assignment may be prioritized not for each layer but for each data package.

(Fifth Embodiment) In this embodiment,
It differs from the first to fourth embodiments in that the band of the vacant layer is distributed to a plurality of other layers when a blank period occurs in any of the layers.

FIG. 9 shows a state in which bands are distributed to a plurality of layers. As illustrated, when a blank period occurs in the second layer, the vacant band is distributed to the third layer and the fourth layer. The distribution process is performed by the band adjustment unit 42 in FIG. The distribution ratio may be equal or unequal. When making them uneven, the ratio may be determined according to the data amount of the data package that should be originally assigned to each of the other multiple layers, or the ratio may be determined according to the media type of those data packages. Good.

The present invention has been described above based on some embodiments. It is understood by those skilled in the art that this embodiment is an exemplification, that various modifications can be made to the combinations of the respective constituent elements and the respective processing processes, and that such modifications are within the scope of the present invention.

In the present embodiment, the transmitter and the receiver in the terrestrial digital radio broadcast have been described.
In a modified example, it may be realized in the form of television broadcasting or radio broadcasting such as terrestrial broadcasting, satellite broadcasting, cable broadcasting, and Internet broadcasting. Further, it is not necessarily limited to the field of "broadcasting", and may be applied to various data streams to be transmitted.

[0059]

According to the present invention, the data transmission efficiency in digital broadcasting can be improved.

[Brief description of drawings]

FIG. 1 is a diagram showing a logical configuration of a broadcast data stream.

FIG. 2 is a functional block diagram showing a configuration of a broadcasting system.

FIG. 3 is a functional block diagram showing a configuration of a broadcast server.

FIG. 4 is a functional block diagram showing a configuration of a broadcast receiving terminal.

FIG. 5 is a diagram showing each layer when band adjustment is performed on a designated layer.

FIG. 6 is a diagram showing a state in which a plurality of layers are integrated in the second embodiment.

FIG. 7 is a diagram showing a state in which a part of a data package flowing to another layer is flowed to a layer having a blank period in the third embodiment.

FIG. 8 is a diagram showing a state in which a band is preferentially adjusted for a specific layer.

FIG. 9 is a diagram showing a state in which bands are distributed to a plurality of layers.

[Explanation of symbols]

10 broadcasting system, 12 broadcasting receiving terminal, 14
Broadcast server, 33 package generation unit, 38 layer setting unit, 40 organization processing unit, 42 band adjustment unit,
44 instruction reception unit, 60 layer recognition unit, 62 adjustment detection unit, 68 adjustment processing unit, 70 package extraction unit.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ identification code FI theme code (reference) H04N 7/081 H04N 7/13 Z 7/24 (72) Inventor Hirokazu Tsuchiya 4 Kitashinagawa, Shinagawa-ku, Tokyo CNY 7-35 Sony Communication Network Stock Company In-house (72) Inventor Mitsuhiro Nishi 4-73 Kita Shinagawa, Shinagawa-ku, Tokyo Sony Communication Network Stock Company Internal F-term (reference) 5C059 MA35 PP01 PP04 RB10 RB17 RC32 RC33 RC34 SS01 SS06 UA34 UA39 5C063 AB07 AB11 AC01 AC10 5K028 AA11 CC05 DD01 DD02 EE03 KK01 LL11 5K030 GA03 GA08 HA08 HB01 HB02 JA01 KA02 LD07

Claims (34)

[Claims] 1. A data stream is formed by multiplexing layers that are logical data transmission paths, and a data package having a specific purpose as contents is flowed to each of the multiplexed layers. In the layer, the bandwidth of other layers is dynamically changed according to the situation by expanding the bandwidth of other layers within the blank period when there is no data package to flow. And data transmission method. 2. A data stream is formed by multiplexing layers, which are logical data transmission paths, and a data package having an individual purpose as a content is sent to each of the multiplexed layers. In the data transmission method, the layer bandwidth is dynamically changed according to the situation by integrating the layer with another layer in a blank period when there is no data package to be transmitted. 3. A data stream is formed by multiplexing layers, which are logical data transmission paths, and a data package having an individual purpose as a content is sent to each of the multiplexed layers. In this layer, the bandwidth of the layer is dynamically changed according to the situation by flowing at least a part of the data package that should be originally sent to another layer during a blank period when there is no data package to be sent. Data transmission method. 4. The data transmitting method according to claim 1, wherein the data stream and the content are configured for broadcasting, and the band of the layer is dynamically changed according to a broadcasting situation. . 5. A layer setting unit for storing the band of each demarcated layer in order to configure a data stream in a form in which layers which are logical data transmission lines are multiplexed, and an individual purpose as contents. A package generation unit that generates a plurality of data packages that have, an organization processing unit that allocates the data package to each of the layers to be multiplexed, and a band of the layer in a blank period in which there is no data package to be transmitted in any layer. A data transmission device, comprising: a band adjustment unit that performs a process of expanding the bandwidth of another layer within a limit of the width. 6. A layer setting unit for storing the band of each demarcated layer in order to configure a data stream in a form in which layers which are logical data transmission lines are multiplexed, and an individual purpose as contents. A package generation unit that generates a plurality of data packages that the user has, an organization processing unit that allocates the data packages to each of the layers to be multiplexed, and a layer is set to a different layer during a blank period when there is no data package to be transmitted in any layer. And a band adjusting unit that is integrated with the layer of. 7. A layer setting unit for storing the band of each defined layer for constructing a data stream in a form in which layers which are logical data transmission paths are multiplexed, and an individual purpose as contents. A package generation unit that generates a plurality of data packages that have, an organization processing unit that allocates the data package to each of the layers to be multiplexed, and in any layer, in a blank period when there is no data package to be allocated, to another layer. A data transmission device comprising: a band adjusting unit that performs a process of allocating at least a part of a data package that should be originally allocated. 8. The data stream and the content are configured for broadcasting, and the band of the layer is dynamically changed according to the broadcasting situation. Data transmission device. 9. The layer setting unit includes one main broadcast layer for intermittently transmitting main broadcast content,
The band of each layer in which a plurality of sub-broadcast layers for transmitting auxiliary broadcast content at arbitrary timing is defined is stored, and the organization processing unit stores the data in at least one of the plurality of sub-broadcast layers. 9. A package is allocated, and the band adjusting unit maintains the band of the main broadcast layer fixedly, and dynamically changes the band among a plurality of sub-broadcast layers. The data transmission device according to claim 1. 10. The layer setting unit secures a layer for transmitting a definition regarding a band of each defined layer, and the knitting processing unit uses the carousel method to provide the definition to the secured layer. The data transmission device according to claim 5, wherein the data transmission device is assigned. 11. The bandwidth adjustment unit preferentially adjusts the bandwidth of a layer in which the blank period has occurred to a layer to which a data package having the maximum data amount is assigned among other layers. The data transmission device according to any one of claims 5 to 10, which is characterized in that. 12. The bandwidth adjusting unit preferentially adjusts the bandwidth of a layer in which the blank period has occurred, with a layer to which a data package of a specific media type is assigned among other layers. The data transmission device according to any one of claims 5 to 11, characterized in that: 13. The data transmission device according to claim 5, wherein the band adjustment unit distributes a band of a layer in which the blank period occurs to a plurality of other layers. 14. The data according to claim 13, wherein the band adjustment unit determines the distribution ratio according to a data amount of a data package that should be originally allocated to each of the other plurality of layers. Transmitter. 15. The bandwidth adjusting unit determines the distribution ratio according to a media type of a data package to be originally assigned to each of the other plurality of layers. Data transmitter. 16. The device further comprises an instruction receiving unit that receives an instruction regarding the start of transmission of a data package that should be originally allocated in any layer from the operator of the apparatus, and the bandwidth adjusting unit is configured to set the received instruction to be blank. The data according to any one of claims 5 to 15, wherein when the band is an instruction for a layer whose band is adjusted with another layer during the period, the band of the layer is returned to the state before the adjustment. Sending device. 17. The layer setting unit stores a band of a layer defined in association with a plurality of media types, and the band adjusting unit selects a layer for which the blank period is detected as a specific medium. The data transmission device according to claim 5, wherein the data transmission device is fixed to a layer corresponding to a type. 18. The data transmission device according to claim 5, wherein the band adjustment unit fixes a layer for which the blank period is detected to a layer having a wide bandwidth. . 19. In a data stream formed by multiplexing layers which are logical data transmission paths,
Detects a layer whose bandwidth is expanded within the bandwidth of one of the layers, and considers the result of the detection, and recognizes each layer including the layer whose bandwidth is dynamically adjusted according to the situation. A data receiving method comprising extracting a data package having an individual purpose as content from each of the recognized layers. 20. In a data stream formed by multiplexing layers, which are logical data transmission paths,
Detects a layer integrated with any of the layers, and after considering the result of the detection, recognizes each layer including a layer whose band is dynamically adjusted according to the situation, A data receiving method characterized in that a data package having an individual purpose as content is extracted from each of them. 21. Recognizing each layer in a data stream formed by multiplexing layers that are logical data transmission paths, and from each of the recognized layers, a data package having an individual purpose as content is provided. Extracted, from the recognized layer, a layer in which at least a part of the data package that should be originally passed to another layer is detected, and the data extracted from the detected layer is extracted from the original layer A method for receiving data, characterized in that the data is reconstructed into an intended state by being combined with a data package. 22. The data stream and the content are configured for broadcasting, and the layer to be recognized includes a layer whose band is dynamically adjusted according to a broadcasting situation. The data receiving method described in any one of 1. 23. In a data stream formed by multiplexing layers which are logical data transmission paths,
An adjustment detection unit that detects a layer whose bandwidth is expanded within the bandwidth of any layer, and a layer including a layer whose bandwidth is dynamically adjusted according to the situation after considering the result of the detection. A data receiving device comprising: a layer recognition unit that recognizes a layer; and a package extraction unit that extracts a data package having an individual purpose as content from each of the recognized layers. 24. In a data stream formed by multiplexing layers, which are logical data transmission paths,
An adjustment detection unit that detects a layer integrated with any layer, a layer recognition unit that recognizes a layer whose band is dynamically adjusted according to the situation, in consideration of the result of the detection, A data receiving device, comprising: a package extracting unit that extracts a data package having an individual purpose as content from each of the recognized layers. 25. A layer recognition unit for recognizing each layer in a data stream formed by multiplexing layers which are logical data transmission paths, and an individual purpose as content from each of the recognized layers. A package extraction unit that extracts a data package that has, an adjustment detection unit that detects, from the recognized layer, a layer in which at least a part of the data package that should originally be flown to another layer is detected, and from the detected layer A data reception device, comprising: an adjustment processing unit that combines the extracted data with a data package extracted from an original layer. 26. The data stream and the content are configured for broadcasting, and the layer to be recognized includes a layer whose band is dynamically adjusted according to a broadcasting situation. The data receiving device according to any one of 1. 27. The data stream includes one main broadcast layer in which main broadcast content is intermittently transmitted, and a plurality of sub-broadcast layers in which auxiliary broadcast content is transmitted at arbitrary timing, The layer recognition unit fixedly recognizes the band of the main broadcast layer, and recognizes a band dynamically adjusted among a plurality of sub broadcast layers, and the package extraction unit includes a plurality of sub broadcast layers. 27. The data receiving apparatus according to claim 23, wherein the data package is extracted from at least one of them. 28. The data stream includes a layer to which a definition regarding a band of each defined layer is transmitted, and the layer recognition unit recognizes each layer based on the definition. The data receiving device according to any one of 23 to 27. 29. A process for detecting a layer whose band is expanded within the bandwidth of any layer in a broadcast data stream formed by multiplexing layers which are logical data transmission paths. In consideration of the detection result, a process of recognizing each layer including a layer whose bandwidth is dynamically adjusted according to the situation, and an individual purpose as broadcast content from each of the recognized layers. A computer program characterized by causing a computer to execute a process of extracting a data package that the computer has. 30. A process of detecting a layer integrated with any layer in a broadcast data stream configured by multiplexing layers which are logical data transmission paths, and a result of the detection. In consideration of the above, a process of recognizing a layer whose bandwidth is dynamically adjusted according to the situation, and a process of extracting a data package having an individual purpose as broadcast content from each of the recognized layers, A computer program characterized by causing a computer to execute. 31. A process of recognizing each layer in a data stream for broadcasting configured by multiplexing layers which are logical data transmission paths, and a process of individually recognizing each layer as broadcast content from each of the recognized layers. A process of extracting a data package having a purpose, a process of detecting, from the recognized layer, a layer in which at least a part of the data package that should originally be passed to another layer is detected, and a process of extracting from the detected layer A computer program characterized by causing a computer to execute the process of combining the data that has been extracted with the data package extracted from the original layer and the process. 32. The data stream is separated into a plurality of layers so that the broadcast data stream is formed by multiplexing layers that are logical data transmission paths, and the data stream is broadcast to each of the plurality of layers. A data package that has an individual purpose as content is allocated, and in any layer, in a blank period when there is no data package to be allocated, the bandwidth of that layer is limited and the band of another layer is expanded. A transmission medium for transmitting data. 33. The data stream is separated into a plurality of layers so that the data stream for broadcasting is formed by multiplexing layers that are logical data transmission paths, and the data stream is broadcast to each of the plurality of layers. A data package with a specific purpose is assigned as the content, and in any layer, during a blank period when there is no data package to be assigned, that layer transmits data having a structure integrated with other layers. Characteristic transmission medium. 34. The data stream is separated into a plurality of layers so that the data stream for broadcasting is formed by multiplexing layers which are logical data transmission paths, and the data stream is broadcast to each of the plurality of layers. A structure in which a data package having a specific purpose is allocated as content, and at least a part of the data package that should be originally allocated to another layer is allocated in a blank period in which there is no data package to be allocated in any layer. A transmission medium, which is characterized in that it has data to be transmitted.