JP2017046083A - Transmission/reception method for digital television broadcast system, transmission method and reception method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve flexibility and transmission efficiency by expanding operation of logo data when making a video image into ultra high definition.SOLUTION: In a transmission system, the logo data are modularized for each logo identification and each logo type, and the modularized logo data are distributed to a plurality of sections of a common data table. Logo data distribution information indicating a correspondence between the logo type regarding the logo data and the section to distribute the logo data is defined and inserted into a logo data distribution descriptor of the common data table. Logo transmission description information is generated from logo management information including the logo identification and the logo type of the logo data and inserted into a logo transmission descriptor of a service description table. The common data table and the service description table are multiplexed with a broadcast signal, and the multiplexed broadcast signal is transmitted.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transmission / reception method, a transmission method, and a reception method of a digital television broadcast system.

  Currently, in digital television broadcasting, HDTV (High Definition Television) video signals with 1920 or 1440 horizontal pixels and 1080 vertical pixels are mainly used, but higher definition video distribution is required. It came to be. For this reason, standardization of ultra-high-definition television broadcasting using 4K (3840 x 2160) 4K or 16K (7680 x 4320) 8K UHDTV (Ultra High Definition Television) compared to HDTV It is being advanced.

  By the way, in the current digital terrestrial television broadcasting, a section format table called CDT (Common Data Table) is applied to transmission of service logo data such as a logo mark used in a program column. ARIB TR-B14 Version 5.9, Volume 1, Section 5.4 describes the section_number field in the CDT transmission. “There is a complete section from 0 to the number indicated by last_section_number. For service logo data transmission, The logo of each size is transmitted in the section of section_number that matches the logo_type value. " This means that when logo data having a certain logo_type value is transmitted, all types of logo data from 0 to the logo_type value are transmitted in units of one section.

"Digital Terrestrial Television Broadcasting Operation Regulations" ARIB TR-B14 5.9 Edition Revised on July 03, 2015 Volume 1

  The above-mentioned logo data transmission method in digital television broadcasting requires a non-zero required value that cannot transmit logo data of a size exceeding one section, in other words, a size that spans multiple sections. There is a problem that it is not possible to select and transmit only logo_type logo data. For this reason, the expansion, flexibility, and transmission efficiency of the operation of logo data are impaired when the digital television broadcast has an extremely high definition.

  An object of the present invention is to provide a digital television broadcasting system transmission / reception method, a transmission method and a reception method thereof that can expand the operation of logo data and improve flexibility and transmission efficiency in the case of ultra high definition video. Is to provide.

  The first embodiment is a transmission / reception method for a digital television broadcast system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification, with a size exceeding one section of a common data table. Modularizes the logo data for each logo identification and logo type, distributes the modularized logo data to multiple sections of the common data table, and distributes the logo data with the logo type Define the logo data distribution information indicating the correspondence with the section and insert it into the logo data distribution descriptor of the common data table, and the logo transmission description information from the logo management information including the logo identification and logo type of the logo data. Generate and insert into the logo transmission descriptor of the service description table, the common data table Fine the service description table multiplexed on the broadcast signal, and transmits the multiplexed broadcast signals. The reception system receives the broadcast signal, acquires the service description table, extracts the logo transmission description information from the logo transmission descriptor of the acquired service description table, acquires the logo management information, and is acquired. The logo data distribution information is acquired from the logo data distribution descriptor of the common data table of the broadcast signal based on the logo management information, and stored in the module from a plurality of sections specified by the acquired logo data distribution information. Get logo data for each logo type and logo type.

  The second embodiment is a transmission / reception method of a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification, having a size exceeding one section of a common data table. Includes modularizing the logo data according to the logo identification and logo type, distributing the modularized logo data to a plurality of sections of the common data table, and including the logo identification of the logo data and the logo type. Generate logo data distribution information indicating the correspondence between the logo management information and the logo type and the section to be distributed for the logo data and insert it into the logo transmission descriptor of the service description table. The service description table is multiplexed with the broadcast signal, and the multiplexed broadcast signal is transmitted.The receiving system receives the broadcast signal, acquires the service description table, extracts the logo transmission descriptor from the acquired service description table, acquires the logo management information and logo data distribution information, and is acquired. Based on the logo management information and logo data distribution information, logo identification and logo data for each type of logo stored in the module are obtained from a plurality of sections distributed in the common data table of the broadcast signal.

  The third embodiment is a transmission / reception method of a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification, with a size exceeding one section of MH-CDT (MH-common_data_table). The transmission system determines which logo type indicates the logo data, and sets the section number value of the MH-CDT section that distributes the logo data determined for each logo type. The logo data is distributed and arranged in the section of the number set for the MH-CDT and set in the data module area of the MH-CDT section together with the data size of the logo before division. An MH-logo transmission descriptor is generated from the logo management information including identification and logo type, described in the descriptor area of MH-SDT (MH-Service Description Table), and the MH-CDT Fine the SDT is multiplexed on the broadcast signal, and transmits the multiplexed broadcast signals. The receiving system receives the broadcast signal, acquires the MH-SDT, extracts the MH-logo transmission descriptor from the acquired MH-SDT, acquires the logo management information, and acquires the logo management information. The MH-CDT is acquired based on the MH-CDT, and the logo data is acquired from the acquired MH-CDT section and connected.

  Or, it is a transmission / reception method of a digital television broadcasting system capable of multiplexing and transmitting any number of logo data of different types per logo identification, with a size exceeding one section of MH-CDT (MH-Common Data Table). The transmission system modularizes the logo data for each logo identification and logo type, distributes the modularized logo data to a plurality of MH-CDT sections of the MH-CDT, and distributes the logo data to the logo type. The logo data distribution information indicating the correspondence with the MH-CDT section is described in the MH-CDT different from the logo data distribution, and the MH indicating the logo management information including the logo identification and logo type of the logo data. -Describe the logo transmission descriptor in the descriptor area of MH-SDT (Service Description Table), multiplex the MH-CDT and the MH-SDT on the broadcast signal, and send the multiplexed broadcast signal. The receiving system receives the broadcast signal, acquires the MH-SDT, extracts the logo transmission descriptor from the acquired MH-SDT, acquires the logo management information, and acquires the logo management information. MH-CDT section including logo data distribution information is acquired, and logo identification and logo type stored in the module from multiple CDT sections distributed to MH-CDT of the broadcast signal based on logo data distribution information Get logo data for.

The block diagram which shows the structure of the transmission apparatus for broadcasting of the digital television broadcasting system which concerns on 1st Embodiment. The figure for demonstrating the area | region which stores the process result of the logo data modularization part of the transmitter shown in FIG. The figure which shows the data structure of CDT used by the CDT sectioning part of the transmitter shown in FIG. The figure which shows the data structure of the logo data distribution descriptor of the transmitter shown in FIG. 1 is a block diagram showing a configuration of a broadcast receiving device of a digital television broadcast system according to a first embodiment. The flowchart for demonstrating the processing operation regarding the logo data of the receiver shown in FIG. The block diagram which shows the structure of the transmission apparatus for broadcasting of the digital television broadcasting system of 2nd Embodiment and 3rd Embodiment when applying to TLV / MMT in 1st Embodiment. The figure which shows the data structure which expanded the MH-logo transmission descriptor in the transmitter shown in FIG. The flowchart for demonstrating the processing operation of the transmission apparatus for broadcasting of the digital television broadcasting system which concerns on 3rd Embodiment. The figure which shows the data structure regarding data_module_byte of the processing operation shown in FIG. The figure which shows the other data structure regarding data_module_byte of the processing operation shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
Hereinafter, a transmission / reception method of the digital television broadcast system according to the first embodiment will be described with reference to FIGS.

  FIG. 1 is a block diagram showing a configuration of a broadcasting transmission device of a digital television broadcasting system according to the present embodiment. This broadcast transmitter inputs, for example, logo data used in a program display field such as EPG (Electronic Program Guide) and logo management information for managing the logo of the logo data, and each of them is a logo data module unit 11. , The CDT sectioning unit 12, the logo data distribution descriptor generating unit 13, the logo transmission descriptor generating unit 14, the SDT (Service Definition Table) sectioning unit 15, and the multiplexing unit 16 in the video signal, audio signal, PSI (PSI) Multiplexed as MPEG-2_TS (Transport Stream) (hereinafter TS) together with Program Specific Information (SI) other than CDT and SDT (Service Information), etc., and transmission path coding such as error correction coding and modulation (not shown) ) Is sent to the service area as a broadcast signal.

  Here, in the transmission system of service logo data for digital television broadcasting, based on the provisions of 5.4.1.2 of ARIB TR-B14, a section format table called CDT (Common Data Table) is used, and the logo type ( Logo management information indicating the correspondence between the “logo_type” and the section to be transmitted is defined as a new descriptor and transmitted together with the logo data.

  Usually, a logo used in broadcasting differs for each broadcasting channel (service). For this reason, each logo data is given a logo identification (hereinafter, logo_id) for identification and management by the receiver. In addition, the same logo_id is assigned to logo data of multiple types of sizes that have the same design and color, and differ in the number of pixels depending on the assumed receiver and its application, etc., and each type has the logo type ( Hereinafter, it is distinguished by logo_type). In addition, the logo_id is managed by updating with a version number (hereinafter, logo_version).

  The transmitted logo data is sent to the logo data module 11 together with logo_id, logo_type, and logo_version which are logo management information. This logo data modularization unit 11 compresses the input logo data, and logo data having a data structure defined in FIG. 2 (quoted from Table 5-15 of 5.4.1.2 of ARIB TR-B14) for each logo_id and logo_type. Store it in an area called a module. This logo data module has a data_size field of 16 bits, but cannot store 64 kbytes of data in the CDT section.

  The logo data module is sent to the CDT sectioning unit 12 by the logo data module forming unit 11. The CDT sectioning unit 12 distributes the logo data module to a plurality of sections of the CDT and transmits them to the multiplexing unit 16. Here, the CDT has a data structure as shown in FIG. 3 (quoted from Table 5-14 of 5.4.1.2 of ARIB TR-B14). The CDT is identified for each download data identification (hereinafter, download_data_id). One section of the CDT has a maximum size of 4 kbytes indicated by the section_length field, and the CDT can be divided into a maximum of 256 sections and transmitted.

  The logo management information logo_id, logo_type, and logo_version are also sent to the logo data distribution descriptor generation unit 13 and the logo transmission descriptor generation unit 14. For each logo data, the logo data distribution descriptor generation unit 13 generates a logo data distribution descriptor indicating the correspondence between the logo_type and the distributed CDT section, and sends the generated logo data distribution descriptor to the CDT sectioning unit 12. To place. In addition, the logo transmission descriptor generation unit 14 sets 0x01 separately when the CDT transmission method 1 is specified by the logo transmission type (logo_transmission_type), and logo data of logo identification (logo_id) and logo version number (logo_version). Along with the management information, a download data identification (download_data_id) is given to generate a logo transmission descriptor. Here, download_data_id is set to the same value as CDT download_data_id, so that it is possible to specify logo data for CDT transmission corresponding to a certain broadcast channel (service). The SDT sectioning unit 15 arranges a logo transmission descriptor for each service_id specifying a broadcast channel in the SDT descriptor area, transmits it to the multiplexing unit 16, and performs TS multiplexing together with CDT section data.

  Now, if the size of the data for each logo_type stored in the logo data module is within 4 kbytes of the size of one section, it can be transmitted using one section. However, when logo data with a large number of pixels is transmitted, for example, in 4K and 8K broadcasting, there is a possibility that it exceeds 4 kbytes. Also, in ultra high-definition digital broadcasting, if you do not use the logo_type that was used in terrestrial digital broadcasting but select only a certain type of logo and transmit it in any order Is also possible. For these reasons, “the logo of each size is transmitted as it is in the section_number section that matches the“ logo_type ”value as determined in the operation regulations of digital terrestrial broadcasting. Cannot be used. Therefore, in this embodiment, a logo data distribution descriptor is defined so that CDT can be transmitted even in such a case. The data structure of the logo data distribution descriptor is as shown in FIG. 4, for example.

The logo data module identified by logo_type is divided into CDT sections with consecutive section numbers for transmission.The first section number is described in the start_section_number field, and the number of section divisions for transmitting the logo data module is set. Enter in the numbers_of_sections field. For example, two types of logo_type logo data are transmitted, logo_type = 0x05 1000byte logo data is section number 0, 10000byte logo data logo_type is 0x06, 4000byte, 4000byte, 2000byte in 3 sections in total. The data is divided and transmitted sequentially from section number 1. in this case,
logo_type = 0x05, start_section_number = 0x00, numbers_of_sections = 0x01
logo_type = 0x06, start_section_number = 0x01, numbers_of_sections = 0x03
May be described. The logo data distribution descriptor is transmitted in the CDT descriptor area. The series of logo data transmission system is as shown in FIG.

  On the other hand, if the corresponding broadcast receiving apparatus detects that the logo transmission descriptor is placed in the SDT descriptor area for the logo data of the desired broadcast channel (service), the CDT of the service First, an arbitrary corresponding CDT section is acquired with reference to the specified download_data_id. As described above, by analyzing the logo data distribution descriptor described in the acquired CDT section, it is possible to grasp which logo_type logo data is transmitted in which section (group) of which section number. Then, by setting so as to filter the section number of the next required logo_type, it is possible to efficiently acquire the logo data.

  Next, the configuration of the broadcast receiving apparatus will be described. FIG. 5 is a block diagram showing a configuration of the broadcast receiving apparatus. As shown in FIG. 5, the broadcast receiving apparatus includes a transmission path decoding unit 201, a module I / F unit 202, a section processing unit 203, a TS processing unit 204, a video decoding unit 205, an audio decoding unit 206, and an OSD processing unit 207. (OSD: On-Screen Display), communication I / F unit 208, operation unit 209, NVRAM 210 (NVRAM: Non-Volatile RAM), ROM 211 (ROM: Read Only Memory), RAM 212 (RAM: Random Access Memory), CPU 213 ( A CPU (Central Processing Unit), a descrambler 214, and a storage unit 215 are provided, and each unit is connected by a bus 216.

  The transmission path decoding unit 201 performs demodulation processing and error correction decoding processing on a broadcast signal received from a receiving antenna (not shown) to obtain a transport stream TS. The TS processing unit 204 performs processing of separating information multiplexed as a packet as the transport stream TS and extracting a video signal, an audio signal, and the like. Also, the section processing unit 203 extracts related information in section format such as PSI (Program Specific Information) and SI (Service Information) demultiplexed from the transport stream TS in cooperation with the TS processing unit 204, and also CDT. Implement the process. For example, by setting filtering conditions, it is possible to extract only a section having a specific section number from EIT or CDT that is generally composed of a plurality of sections.

  The video decoding unit 205 decodes the video signal output from the TS processing unit 204 and outputs the decoded video signal to the OSD processing unit 207. The audio decoding unit 206 decodes the audio signal output from the TS processing unit 204 and outputs the decoded audio signal to the audio output device 221. The audio output device 221 is an acoustic device including an amplifier and a speaker, and performs audio reproduction according to the audio signal output from the audio decoding unit 206. The OSD processing unit 207 performs predetermined OSD processing on the video signal output from the video decoding unit 205 under the control of the CPU 213, and outputs the result to the display device 222. The display device 222 is an LCD (Liquid Crystal Display) or the like, and performs screen display based on the output video signal. For example, the display device 222 performs screen display such as EPG based on the SDT described in the broadcast channel information and the EIT described in the program information included in the SI separated from the multiplexed transport stream TS1.

  The communication I / F unit 208 is an interface that performs data communication with the communication network 4 using a predetermined communication protocol under the control of the CPU 213. The operation unit 209 is an operation key, a remote controller, or the like, and receives a user operation input. The NVRAM 210 stores various setting information. For example, the NVRAM 210 stores the format of content that can be handled by the broadcast receiving apparatus 2 as setting information.

  The ROM 211 stores a program executed by the CPU 213 and the like. The RAM 212 provides a work area when the CPU 213 executes the program. The RAM 212 also provides an area for temporarily storing EIT information included in the SI separated from the multiplexed transport stream TS1. The CPU 213 centrally controls the operation of the broadcast receiving apparatus 2 by developing the program stored in the ROM 211 in the work area of the RAM 212 and sequentially executing the program.

  The module I / F unit 202 is an interface connected to the security module 220 in which encryption key information related to limited reception is stored.

  Based on the encryption key information stored in the security module 220, the descrambler 214 descrambles the payload part scrambled in the received transport stream TS1. By descrambling by the descrambler 214, the broadcast receiving apparatus 2 supports limited reception using EMM or ECM. The storage unit 215 is a large-capacity storage medium such as an HDD, and stores received content, for example.

  Next, the processing operation regarding the logo data of the broadcast receiving apparatus executed under the control of the CPU 213 will be described with reference to the flowchart shown in FIG.

  First, when a broadcast signal is received (step S11), the broadcast signal is demodulated to obtain an SDT (step S12). Here, for logo data of a desired broadcast channel (service), the presence or absence of a logo transmission descriptor is repeatedly determined from the acquired SDT (step S13), and if the logo transmission descriptor is described in the SDT (YES) Then, it is determined from the logo transmission descriptor whether or not there is an unreceived logo (step S14). Based on the determination result of step S14, a CDT section of any section_number of the specified service is acquired (step S15), and a logo data distribution descriptor is extracted from the acquired CDT section and analyzed (step S16). Based on the analysis result, the CDT section of the section_number for the desired logo_type of the specified service is acquired (step S17), the logo data is acquired from the acquired CDT section (step S18), and the series of processing ends.

  That is, according to the above processing procedure, it is possible to grasp which logo data of which logo_type is transmitted in which section (group) of which section number, so it is set to filter the necessary section number of logo_type next. By doing so, the logo data can be acquired efficiently.

  As described above, in the first embodiment, in the section-format logo data transmission, the logo data distribution descriptor indicating the correspondence between the logo type and the section to be transmitted is designated and transmitted for the logo data to be transmitted. Therefore, it is possible to select the required number of necessary types of logo data and efficiently transmit them in an arbitrary order without depending on the size of the logo data.

  In this embodiment, the CDT based on the MPEG-2 TS used in the current terrestrial broadcasting and the like has been described. However, TLV (Type Length Value) / MMT (which is assumed to be used in an advanced BS in the future) You may apply to MH-CDT based on MPEG Media Transport. However, in the case of TLV (Type Length Value) / MMT (MPEG Media Transport), there are the following differences in blocks and processing as compared with MPEG-2 TS. For MH-, refer to ARIB STD-B60 “Reference 1 Configuration of control information described in this standard”, “Tables and descriptors specified in ARIB STD-B10. Table identifiers and descriptor tag values that have been modified to be used in broadcasting systems that use are distinguished from the original tables and descriptors by adding “MH-” meaning MPEG-H to the beginning of the name. Yes. Is described.

  The TLV / MMT MH-CDT section corresponds to the MPEG-2 TS CDT section, the TLV / MMT MH-SDT section corresponds to the MPEG-2 TS SDT section, and the TLV / MMT MH-logo transmission descriptor. Corresponds to the MPEG-2 TS logo transmission descriptor.

  The data structure of the MH-CDT is described in ARIB STD-B60 7.3.3.10. In this case, for example, even if the number of bits of the tag field (descriptor_tag) of the logo data distribution descriptor in FIG. 2 is 16 bits, the essence is not changed at all.

(Second Embodiment)
Hereinafter, as a transmission / reception method of the digital television broadcasting system according to the second embodiment, a broadcasting transmission apparatus in the case of the TLV / MMT will be described. FIG. 7 shows the configuration, and input logo data and logo management information for managing the logo of this logo data, respectively, logo data module unit 21, MH-CDT section unit 22, MH-logo transmission Through the descriptor generation unit 23 and the MH-SDT sectioning unit 24, the MMT multiplexing unit 25 multiplexes it with the video signal, the audio signal, and the like to perform transmission path coding such as error correction coding and modulation (not shown). Is transmitted to the service area as a broadcast signal.

  Specifically, the transmitted logo data is sent to the logo data module 21 together with logo_id, logo_type, and logo_version which are logo management information. The logo data module unit 21 stores the input logo data in an area called a logo data module for each logo_id and logo_type. The logo data module is sent to the MH-CDT sectioning unit 22 by the logo data module forming unit 21. The MH-CDT sectioning unit 22 distributes the logo data module to a plurality of sections of the MH-CDT and transmits it to the MMT multiplexing unit 25. Here, the MH-CDT is identified for each download_data_id. The logo data distribution information of the MH-CDT sectioning unit 22 is sent to the MH-logo transmission descriptor generation unit 23.

  The logo management information logo_id, logo_type, and logo_version are also sent to the MH-logo transmission descriptor generator 23. This MH-logo transmission descriptor generator 23 sets 0x01 separately when the CDT transmission method 1 is specified as the logo transmission type (logo_transmission_type), and the logo identification (logo_id) and logo version number (logo_version) logo. Along with the data management information, a download data identification (download_data_id) is given to generate a logo transmission descriptor. Here, download_data_id is set to the same value as MH-CDT download_data_id, so that it is possible to specify logo data of MH-CDT transmission corresponding to a certain broadcast channel (service). Here, the MH-logo transmission descriptor generation unit 23 receives the logo data distribution information from the MH-CDT sectioning unit 22 and extends the contents of the logo data distribution information in the MH-logo transmission descriptor.

  The MH-SDT sectioning unit 24 arranges the MH-logo transmission descriptor for each service_id specifying the broadcast channel in the descriptor area of the MH-SDT and transmits it to the MMT multiplexing unit 25, and the MH-CDT section data Multiplex with.

  The essential difference from the configuration of the first embodiment shown in FIG. 1 is that, instead of newly defining the logo data distribution information as a descriptor and describing it in the descriptor area in the MH-CDT, it is described in the MH-SDT. The MH-logo transmission descriptor is to be extended and described. This expansion is shown in FIG.

  According to this configuration, logo data distribution information can be acquired before acquiring the MH-CDT by describing it in the MH-SDT. Therefore, the receiver must first acquire one of the MH-CDT sections and use the logo. Speaking in FIG. 8 of confirming the data distribution descriptor, step S15 is not necessary, and the necessary logo_type logo data can be acquired more efficiently.

  Note that the processing of this embodiment can also be applied to the case of the MPEG-2 TS system of the first embodiment.

(Third embodiment)
The third embodiment can be realized by a transmission device similar to the second embodiment. However, logo data distribution information is not inserted into the MH-logo transmission descriptor. Logo data distribution information is fixed in advance according to the operating rules, or additionally inserted into the data_module_byte of MH-CDT.

  In advanced broadband satellite digital broadcasting, logo_type for three types of size patterns is defined. One is “2K”, which is the same as “HD large” defined in terrestrial digital broadcasting. The other two are “Small” assuming display on a 4K screen and “Large” assuming display on an 8K screen. Compared with “2K”, the number of vertical and horizontal dots is doubled. 4 times. In addition, with the “small” and “large” logos, although the number of colors used at the same time is limited, a color palette is also transmitted to enable use of RGB 8-bit full color colors. For this reason, the upper limit of the logo data size is large.

  The “2K” logo has the same upper limit of size as “HD Large” for terrestrial digital broadcasting, and it can be sent with one MH-CDT, but “Small” is 8000 bytes and “Large” is 16000 bytes. An upper limit is assumed and cannot be sent with one MH-CDT. For this reason, a new rule for transmitting logo data by a plurality of MH-CDTs is required. Hereinafter, as a third embodiment, a method for transmitting logo data using a plurality of MH-CDTs will be described.

  FIG. 9 shows a flow of processing according to the third embodiment. In FIG. 9, it waits for the input of logo data (step S21), and when logo data is input, it is determined whether logo_type indicates 2K, large, or small, and logo data is displayed for each logo_type. The value of section_number to be distributed is set (step S22). Subsequently, in consideration of the maximum capacity of the MH-CDT, the logo data is divided and set in the data_module_byte of the MH-CDT section together with the arrangement information (step S23), and the series of processes is terminated.

  That is, in this embodiment, a service logo of a large size that does not fit in one section is transmitted by MH-CDT by changing only the operation regulations such as the definition of data_module_byte. Therefore, a new data structure that is not MH-CDT, or a new descriptor to be inserted into MH-CDT, added to the ARIB standard for the purpose of changing the definition of MH-logo transmission descriptor. There is no need to make changes.

  Hereinafter, Examples 1 to 5 will be described for specific processing of the present embodiment.

[Example 1]
In the logo data modularization unit 11 shown in FIG. 1, the number of logo_type logo bytes corresponding to the data_module_byte syntax of terrestrial digital broadcasting, that is, the total size of data divided into each section is “ Add a field called "total_logo_size". An example is shown in FIG. Also, instead of being stipulated in the digital terrestrial broadcasting as “Transmit a logo of each size in the section with the section_number matching the logo_type value”, the section_number value used for each logo_type is fixed and used. Make provisions in the regulations. Here
2K 0
Large 1-4
Small 5-6
And Also, logo data is divided every 4000 bytes and stored in data_byte. By determining in this way, the section_number range of the section to be acquired for receiving the logo of each logo_type can be known in advance without using the received information in the MH-CDT. For example, if you want only a small logo, you need to get all sections with section_number from 0 to 6, and then determine the logo_type in data_module_byte and not determine that section with section_number of 5 and 6 is applicable. You only need to get sections 5 and 6.

  Also, by adding the total_logo_size and determining the division size, it becomes possible to determine that it is not necessary to receive all sections of section_number determined by logo_type. For example, if the total_logo_size is 10000 bytes with a large logo, it can be seen that the data_size of sections with section_number 1 to 4 is 4000byte, 4000byte, 2000byte, 0byte, respectively, and section_number = 4 section need not be acquired I understand. Similarly, if the section with section_number = 5 is acquired and the total_logo_size is 4000 bytes or less, it is understood that the section with section_number = 6 need not be acquired.

  Here, as an example, the values of section_number are assigned in the order of the logotype values, but this order may not be used.

  In this example, the division size is 4000 bytes as an example, but another value may be used. For example, a division size may be set to 4070 bytes, and a logo with a total_logo_size of 10000 bytes may be divided into 4070 bytes, 4070 bytes, 1860 bytes, and 0 bytes.

  Also, as an example here, total_logo_size is added to data_module_byte to determine the partition size, but without determining the partition size, you can add information about whether there is a continuation in data_module_byte, and also determine the partition size In addition, other information such as whether there is a continuation may be added.

[Example 2]
It is not known in which order the sections are sent in the stream, and the section that has not been acquired while one section can be acquired and the section filter for acquiring the next section is reset. If one section is acquired and the next section is acquired, the time until all the desired sections are acquired may increase. Further, by simultaneously setting the section filter, the acquisition time can be shortened, but a lot of section filter resources are consumed.

  As a means for avoiding this, it is conceivable to specify a mask for the section filter condition.

  For some bits, this is a function to obtain a section regardless of whether the value is 0 or 1. Regarding the mask specification of section_number, the bit specified as 0 is 0, the bit specified as 1 is 1, and the bit that can be 0 or 1 is represented by x.

Large logos can be up to 4 sections, small logos can be up to 2 sections. Large logos can be masked with 2 bits and small logos with 1 bit. Therefore, the mask designation of section_number of the large logo is set to 000001xx (00000100, 00000101, 00000110, 00000111), and the mask designation of section_number of the small logo is set to 0000001x (00000010, 00000011). In this way, the section_number value to use is
Small 2-3
Large 4-7
It becomes. in addition
2K 0
In this case, the section with section_number = 1 becomes unnecessary.

  Normally, section_number is arranged from 0 to last_section_number without omission, but EIT [schedule] (and MH-EIT [schedule]) is an operation in which an intermediate section may be missed as an exception. Therefore, if MH-CDT is specified to perform exception operation in which section_number = 1 is not sent, logo_type logo data can be transmitted in 7 sections with section_number 0 and 2-7. .

  Here, section_number = 1 is unnecessary as an example, but logo_type logo data may be transmitted in seven sections with section_number 1 to 7 with section_number = 0 as an unnecessary section.

[Example 3]
If the mask designation similar to that of the second embodiment is used, if it can be shown that the data is invalid, it can be realized without performing an exceptional operation that does not send an intermediate section.

  For example, it can be realized by deciding that the value of 0xFF will not be used in the future as the logo_type, and that if the value of the data_module_byte's logo_type is 0xFF, it is determined to be invalid data. In the case of a receiver that acquires only the section of the necessary section_number, this section is not acquired, so there is no effect on the processing. In the case of a receiver that acquires all sections of section_number using the section filter mask function, it may be determined that the data is invalid and discarded.

[Example 4]
Alternatively, when the same mask designation as that of the second embodiment is performed, the logo data itself is not sent for one section, but can be used for transmitting other information.

  The 2K logo is transmitted with section_number = 1, the section_number = 0 is transmitted with different information, section_number = 0 is used for special data, and section_number 1-7 are used for transmitting logo data. it can.

  For example, as shown in FIG. 11, data_module_byte in the case of section_number = 0 can indicate which logo_type logo data is sent with each section number, that is, logo data distribution information. In the example of FIG. 11, the number_of_logo_type which is the number of logo_types is looped so that the number of logo data bytes for each section_number (start_section_number + j) used in each logo_type can be specified.

[Example 5]
If data_module_byte as shown in FIG. 11 is transmitted with section_number = 0, even if the section_number range used in each logo_type is not fixed in the operation rules, the section_number of the desired logo_type after obtaining section_number = 0 By taking the two steps of obtaining the section, it is possible to obtain a desired logo_type service logo. Although it may take a long time to acquire a desired logo by taking two steps, it is possible to cope with the case where a logo_type is newly added in the future.

  When the section_number range is not fixed in the operation rules, the number of sections used in logo_type may be fixed to the maximum, or may be variable depending on the size of the logo data.

  As described above, in the third embodiment, a new data structure that is not MH-CDT or a new descriptor to be inserted into MH-CDT is changed by changing the definition of data_module_byte and the section_number allocation rule. It is possible to transmit a service logo of a large size that does not fit in one section with MH-CDT without additional definitions in the standard or changing the definition of the MH-logo transmission descriptor of the ARIB standard. .

  In the first to fourth embodiments, it is possible to acquire only the section of the desired logo_type section_number as in the case of terrestrial digital broadcasting. In the second to fourth embodiments, it is possible to efficiently acquire a large logo and a small logo by masking section_number and setting a section filter. In the fifth embodiment, it is possible to cope with a case where a new logo_type is added in the future.

  In the embodiment, CDT and MH-CDT are collectively referred to as common data table information, SDT and MH-SDT are collectively referred to as service description table information, a logo transmission descriptor, and an MH-logo transmission descriptor as a logo transmission descriptor. Are collectively referred to.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 11 ... Logo data modularization part, 12 ... CDT sectioning part, 13 ... Logo data distribution descriptor generation part, 14 ... Logo transmission descriptor generation part, 15 ... SDT sectioning part, 16 ... Multiplexing part, 21 ... Logo Data module unit, 22 ... MH-CDT sectioning unit, 23 ... MH-logo transmission descriptor generation unit, 24 ... MH-SDT sectioning unit, 25 ... MMT multiplexing unit, 2201 ... transmission path decoding unit, 202 ... Module I / F unit, 203 ... section processing unit, 204 ... TS processing unit, 205 ... video decoding unit, 206 ... audio decoding unit, 207 ... OSD processing unit, 208 ... communication I / F unit, 209 ... operation unit, 210 ... NVRAM, 211 ... ROM, 212 ... RAM, 213 ... CPU, 214 ... descrambler, 215 ... storage unit, 216 ... bus.

The first embodiment is a transmission / reception method for a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types for each logo identification, with a size exceeding one section of common data table information. The system modularizes the logo data according to the logo identification and logo type, distributes the modularized logo data to a plurality of sections of the common data table information, and distributes the logo data and the logo type. Logo data distribution information indicating the corresponding relationship with the section to be inserted and inserted as logo data distribution descriptor information in the common data table information. From the logo management information including the logo identification of the logo data and the logo version number Point at least to the logo of the common data table information format Generates the logo transmission information predicate inserted logo transmission descriptor information of the service description table information together with the logo management information, multiplexed on the common data table information and the broadcast signal the service description table information, which is the multiple Broadcast signal. Receiving system, the receiving the broadcast signal to obtain the service description table information to obtain the logo management information and the logo transmission information from the logo transmission descriptor information of the acquired service description table information, which is acquired based on the logo transmission information and logo management information acquires the logo data distribution information from the logo data distribution descriptor information of the common data table information of the broadcast signal, from a plurality of sections specified by the acquired logo data distribution information Get logo data for each logo type and logo type stored in the module.

The second embodiment is a transmission / reception method of a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification, with a size exceeding one section of common data table information. The system modularizes the logo data according to the logo identification and logo type, distributes the modularized logo data to a plurality of sections of the common data table information, and identifies the logo identification and logo version of the logo data. Logo transmission information describing the pointing from the logo management information including the number to at least the logo in the common data table information format, and logo data distribution information indicating the correspondence between the logo type and the section to be distributed for the logo data service description table together with the logo management information to generate bets Insert the logo transmission descriptor information of the information, multiplexed on the common data table information and the broadcast signal the service description table information, and sends the multiplexed broadcast signals. The receiving system receives the broadcast signal to acquire the service description table information , extracts the logo transmission descriptor information from the acquired service description table information, and distributes the logo transmission information, logo management information, and logo data acquires the information, logos identifying stored from a plurality of sections that are distributed to the common data table information of the broadcast signal based on the obtained logo transmission information and logo management information and logo data distribution information to the module, logos Get logo data for each type.

Claims (12)

A method of transmitting and receiving a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification, with a size exceeding one section of common data table information,
The transmission system modularizes the logo data for each logo identification and logo type, distributes the modularized logo data to a plurality of sections of the common data table information, and the logo data and the logo type Define the logo data distribution information indicating the correspondence with the section to be distributed and insert it into the logo data distribution descriptor of the common data table information, and the logo from the logo management information including the logo identification and logo type of the logo data Generate transmission description information and insert it into a logo transmission descriptor of service description table information, multiplex the common data table information and the service description table information into a broadcast signal, and send the multiplexed broadcast signal,
The receiving system receives the broadcast signal to acquire the service description table information, extracts the logo transmission description information from the logo transmission descriptor of the acquired service description table information, and acquires the logo management information, The logo data distribution information is acquired from the logo data distribution descriptor of the common data table information of the broadcast signal based on the acquired logo management information, and the module is obtained from a plurality of sections specified by the acquired logo data distribution information. A method of transmitting and receiving digital television broadcasting systems that obtains logo identification and logo data for each type of logo stored in the system. Used for digital television broadcasting systems capable of multiplexing and transmitting any number of logo data of different types per logo identification, with a size exceeding one section of common data table information.
The logo data is modularized for each logo type and logo type,
For the logo data, generate logo data distribution information indicating the correspondence between the logo type and the section to be distributed,
Distributing the modularized logo data to a plurality of sections of the common data table information, inserting the logo data distribution information into a logo data distribution descriptor of the common data table information,
Generate logo transmission description information from logo management information including logo identification and logo type of the logo data and insert it into the logo transmission descriptor of service description table information,
Multiplex the common data table information and service description table information into a broadcast signal,
A digital television broadcast transmission method for transmitting a broadcast signal obtained by the multiplexing unit. Used for digital television broadcasting systems capable of multiplexing and transmitting any number of logo data of different types per logo identification, with a size exceeding one section of common data table information.
The logo data is modularized for each logo identification and logo type, and the modularized logo data is distributed to a plurality of sections of the common data table information, and the logo data is divided into sections that are distributed with the logo type. Define logo data distribution information indicating the correspondence relationship with and insert it into the logo data distribution identifier of the common data table information, and generate logo transmission description information from logo management information including logo identification and logo type of the logo data And inserted into the logo transmission descriptor of the service description table information, the common data table information and the service description table information are multiplexed on a broadcast signal, and corresponds to a transmission system for transmitting the multiplexed broadcast signal,
Receiving the broadcast signal;
The service description table information is acquired from the received broadcast signal, the logo transmission description information is extracted from the logo transmission identifier of the acquired service description table information to acquire the logo management information, and the acquired logo management The logo data distribution information is acquired from the logo data distribution identifier of the common data table information of the broadcast signal based on the information, and the logo identification stored in the module from a plurality of sections specified by the acquired logo data distribution information , Digital TV broadcast reception method to get logo data for each type of logo. A method of transmitting and receiving a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification, with a size exceeding one section of common data table information,
The transmission system modularizes the logo data for each logo identification and logo type, distributes the modularized logo data to a plurality of sections of the common data table information, and identifies the logo data logo and logo The logo management information including the type and the logo data distribution information indicating the correspondence between the logo type and the section to be distributed for the logo data are generated and inserted into the logo transmission descriptor of the service description table information. Multiplex data table information and the service description table information on a broadcast signal, send the multiplexed broadcast signal,
A receiving system receives the broadcast signal to acquire the service description table information, extracts the logo transmission descriptor from the acquired service description table information to acquire the logo management information and logo data distribution information, Digital to acquire logo data for each logo type and logo type stored in the module from multiple sections distributed to the common data table information of the broadcast signal based on the acquired logo management information and logo data distribution information Transmission / reception method of television broadcasting system Used for digital television broadcasting systems capable of multiplexing and transmitting any number of logo data of different types per logo identification, with a size exceeding one section of common data table information.
The logo data is modularized for each logo type and logo type,
Distributing the modularized logo data to a plurality of sections of the common data table information;
Generates logo data distribution information indicating the correspondence between the logo type and the section to be distributed for the logo data, and includes logo management information including logo identification and logo type of the logo data, and the logo data distribution information. Insert it into the logo transmission descriptor of the service description table information,
A transmission method of digital television broadcasting, wherein the common data table information and service description table information are multiplexed and transmitted on a broadcast signal. Used for digital television broadcasting systems capable of multiplexing and transmitting any number of logo data of different types per logo identification, with a size exceeding one section of common data table information.
The logo data is modularized for each logo identification and logo type, the modularized logo data is distributed to a plurality of sections of the common data table information, and the logo including the logo identification of the logo data and the logo type. For the logo data, the logo data distribution information indicating the correspondence between the logo type and the section to be distributed is generated and inserted into the logo transmission descriptor of the service description table information, and the common data table information and Corresponding to a transmission system for multiplexing the service description table information to a broadcast signal and sending the multiplexed broadcast signal,
Receiving the broadcast signal;
The service description table information is acquired from the received broadcast signal, the logo transmission descriptor is extracted from the acquired service description table information to acquire the logo management information and logo data distribution information, and the acquired logo Based on management information and logo data distribution information, logo identification stored in the module from a plurality of sections distributed in the common data table information of the broadcast signal, and digital television broadcasting for acquiring logo data for each type of logo Reception method. A method of transmitting and receiving a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification with a size exceeding one section of MH-CDT (MH-common_data_table),
The transmission system determines which logo type indicates the logo data, sets the value of the section number of the MH-CDT section that distributes the logo data determined for each logo type, and The logo data is distributed and arranged in the section of the number set for MH-CDT and set in the data module area of the MH-CDT section together with the data size of the logo before division, and the set MH-CDT is broadcast Multiplex to signal, send multiplexed broadcast signal,
A transmission / reception method of a digital television broadcasting system, wherein a receiving system receives the broadcast signal, acquires the MH-CDT, acquires the logo data from a section of the acquired MH-CDT, and connects the logo data. Used in digital television broadcasting systems that can multiplex and transmit any number of logo data of different types per logo identification, with a size exceeding one section of MH-CDT (MH-common_data_table),
Determine which logo type indicates the logo data, set the section number value of the MH-CDT section that distributes the logo data determined for each logo type, and set the MH-CDT The logo data is distributed and arranged in the section with the number set for the data module area of the MH-CDT section and set together with the data size of the logo before division,
A digital television broadcast transmission method for multiplexing the set MH-CDT on a broadcast signal and transmitting the multiplexed broadcast signal. Used in digital television broadcasting systems that can multiplex and transmit any number of logo data of different types per logo identification, with a size exceeding one section of MH-CDT (MH-common_data_table),
Determine which logo type indicates the logo data, set the section number value of the MH-CDT section that distributes the logo data determined for each logo type, and set the MH-CDT The logo data is distributed and arranged in the section with the number set for it, set in the data module area of the MH-CDT section together with the data size of the logo before division, and the set MH-CDT is multiplexed with the broadcast signal Corresponding to the transmission system to send the multiplexed broadcast signal,
Receiving the broadcast signal;
Obtaining the MH-CDT from the received broadcast signal;
A method for receiving digital television broadcasting, wherein the logo data is acquired and linked from the acquired MH-CDT section. A method for transmitting and receiving a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification with a size exceeding one section of MH-CDT (MH-Common Data Table),
The transmission system modularizes the logo data for each logo identification and logo type, distributes the modularized logo data to multiple MH-CDT sections of the MH-CDT, and distributes the logo data to the logo type. The logo data distribution information indicating the correspondence with the MH-CDT section is described in the MH-CDT different from the logo data distribution, and the MH indicating the logo management information including the logo identification and logo type of the logo data. -Describe the logo transmission descriptor in the descriptor area of MH-SDT (Service Description Table), multiplex the MH-CDT and the MH-SDT on the broadcast signal, and send the multiplexed broadcast signal,
The receiving system receives the broadcast signal, acquires the MH-SDT, extracts the logo transmission descriptor from the acquired MH-SDT, acquires the logo management information, and acquires the logo management information. MH-CDT section including logo data distribution information is acquired, and logo identification and logo type stored in the module from multiple CDT sections distributed to MH-CDT of the broadcast signal based on logo data distribution information Method of receiving digital logo broadcasting system to get logo data of. MH-CDT (MH-Common Data Table) has a size exceeding one section, and is used in a digital television broadcasting system capable of multiplexing and transmitting any number of logo data of different types per logo identification.
The logo data is modularized for each logo type and logo type,
The modularized logo data is distributed to multiple MH-CDT sections of the MH-CDT, and logo data distribution information indicating the correspondence between the logo type and the distributed MH-CDT sections is distributed. Insert it into a different MH-CDT,
Generate MH-logo transmission descriptor indicating logo management information including logo identification and logo type of the logo data,
Describe the MH-logo transmission descriptor in the descriptor area of MH-SDT (Service Description Table),
A transmission method for digital television broadcasting in which the MH-CDT and MH-SDT are multiplexed and transmitted on a broadcast signal. MH-CDT (MH-Common Data Table) has a size exceeding one section, and is used in a digital television broadcasting system capable of multiplexing and transmitting any number of logo data of different types per logo identification.
The logo data is modularized for each logo identification and logo type, and the modular logo data is distributed to a plurality of MH-CDT sections of the MH-CDT, and the logo type and MH-CDT are distributed. MH-logo transmission description indicating the logo management information including the logo identification and logo type of the logo data described in the MH-CDT different from the logo data distribution and logo data distribution information indicating the correspondence with the section A child is described in a descriptor area of MH-SDT (Service Description Table), the MH-CDT and the MH-SDT are multiplexed with a broadcast signal, and the transmission system for transmitting the multiplexed broadcast signal is supported.
Receiving the broadcast signal;
The MH-SDT is acquired from the received broadcast signal, the MH-logo transmission descriptor is extracted from the acquired MH-SDT to acquire the logo management information, and based on the acquired logo management information The MH-CDT section including the logo data distribution information of the broadcast signal is acquired, and the MH-CDT in which a desired type of logo is arranged is acquired by the logo data distribution information, and a plurality of MH-CDTs distributed to the MH-CDT are acquired. -A method for receiving digital television broadcasts that obtains logo identification and logo data for each logo type stored in the module from the CDT section.

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