MX2007014828A - Program execution apparatus and execution method. - Google Patents

Abstract

A broadcast receiving apparatus which receives and reproduces broadcasts of plural broadcasting systems uses, in parallel, reproduction environments of the plural broadcasting systems, determines the broadcasting system to which a specified channel belongs at the time when a user selects the channel and switches the reproduction environment for reproducing the channel to the reproduction environment of the broadcasting system. Further, the broadcast receiving apparatus determines the reproduction environment of the broadcasting system to which the currently being reproduced channel belongs at the time when a key input is delivered from the user and switches a delivery destination of the key input to the reproduction environment of the broadcasting system.

Description

PROGRAM EXECUTION APPARATUS AND EXECUTION METHOD FIELD OF THE INVENTION The present invention relates to a transmission reception apparatus that receives and reproduces contents included in a transmission wave. In particular, the present invention relates to a transmission reception apparatus that receives and reproduces transmission waves belonging to various transmission systems.

BACKGROUND OF THE INVENTION A transmission reception apparatus, which receives and reproduces contents included in a transmission wave belonging to a transmission system, has conventionally handled only one transmission wave based on a single transmission system. Therefore, it is equipped with and makes use of only one reproduction environment of a single transmission system that receives and reproduces contents included in a transmission wave. Here, the reproduction environment of the transmission system is designed to receive and reproduce the contents based on the specifications of a predetermined transmission system. It is configured by hardware, software and the like that receive and reproduce contents included in a transmission wave. Consequently, for Ref .: 185906 to be able to receive and reproduce these contents based on predetermined specifications, a transmission reception apparatus has to be provided with a reproduction environment of the transmission system based on the specifications, and receive and reproduce the content using the reproduction environment. Here, using the playback environment means initializing the hardware and activating the software that constitutes the playback environment, and receiving and reproducing the contents. For example, the following specifications are defined: Digital Video Transmission-Multimedia Home Platform (DVB-MHP) ETSIES 201812V1.1.1 (2003-12) and similar specifications in a satellite transmission system; the specifications of the Open Cable Applications Platform (OCAP) OS-SP-OCAP 1.0-114-050119 and the like in a cable transmission system, and the specifications of the Advanced Television Systems Committee (ATSC) in a system of transmission by land waves. However, in the event that transmission waves belonging to several transmission systems based on different specifications are transmitted in the same region, it is desirable that a single transmission reception apparatus can receive and reproduce contents included in the transmission waves. respective transmission.

Japanese Patent Application Laid-Open No. 2002-238003 provides an environment that makes it possible for a single transmission reception apparatus, which is equipped with reproduction environments for various transmission systems, to receive and reproduce contents based on the different specifications. Japanese Patent Application Laid-Open No. 2002-238003 provides a mechanism that makes it possible for a single transmission reception apparatus, which is equipped with reproduction environments for various transmission systems to receive and reproduce contents included in a wave transmitted that belongs to the different transmission systems, selectively use the reproduction environments depending on the transmission system that you want to receive and reproduce. In Japanese Patent Application Laid-Open No. 2002-238003, the initialization of the hardware and activation of the software, which constitute the reproduction environments, are carried out each time the reproduction environments are changed. The OCAP specifications define a monitor application that is initially activated upon beginning the use of a playback environment, and which is always activated while the playback environment is being used. For example, a channel change application that is executed in reproduction environments of transmission systems based on the OCAP specifications can be this monitor application. This channel change application is initially activated when a playback environment starts to play, and which is always executed continuously during the execution of the reproduction environment. According to the conventional technique described in Japanese Patent Application Laid-open No. 2002-238003, a transmission reception apparatus can be implemented, which is equipped with reproduction environments of the transmission systems based on the different specifications including the specifications of the OCAP. In this case, the reproduction environments are used selectively when changing the channels of the OCAP specifications and another transmission system. Therefore, a monitor application that belongs to the transmission system based on the OCAP specifications has to be terminated or executed whenever the reproduction environments are changed. Due to the time lost during the activation of the monitor application, it is difficult to achieve a smooth change of channels in this method. To achieve a smooth change of channels in this transmission reception apparatus, the need to terminate or execute the monitor application must be eliminated by achieving a state in which the different transmission systems based on the respective specifications are always available to the user. Same time. Furthermore, there is a need to cause this apparatus to reproduce a channel specified by a user, using the reproduction environment of the transmission system corresponding to the channel. However, the following requirements have to be satisfied in order to achieve this. First, there is a need for a mechanism that determines a transmission system to which a specified channel belongs when the reproduction of the channel is specified by a user and changes a channel reproduction environment for the reproduction environment of the transmission system. In addition, there is a need for a mechanism that determines a transmission environment to which the channel currently being reproduced pertains when a key entry is carried out by a user, and changing a delivery destination of the key entry by the user. reproduction environment of the transmission system. For this the present invention has been conceived. An object of the present invention is to provide an apparatus for reproducing transmission contents that is capable of carrying out a smooth channel change, that is, a smooth change of content.

BRIEF DESCRIPTION OF THE INVENTION To achieve the objective described above, the transmission content reproduction apparatus of the present invention reproduces respective contents that comply with a plurality of transmission specifications that are different from each other. The transmission content reproduction apparatus includes: a plurality of reproduction environments that are ready, in parallel, to respectively reproduce the contents different from each other; a first reproduction environment identification unit that identifies a reproduction environment that is reproducing a content, from among the plurality of reproduction environments, and a supply or delivery unit that provides key entry information indicating the details of a instruction to the reproduction environment identified by the first unit of identification of reproduction environments. In other words, the transmission content reproduction apparatus of the present invention executes in parallel reproduction environments of various transmission systems, receives and reproduces transmissions of the plurality of transmission systems. In case a key entry is supplied from a user, the transmission content reproduction apparatus identifies the reproduction environment of the transmission system to which the channel currently being reproduced belongs, and changes the delivery destination of the transmission. key entry by the reproduction environment of the transmission system. In this way, the plurality of reproduction environments are in a state in which they can be used in parallel. Therefore, even if the reproduction environment that is reproducing a content is changed, there is no need to terminate the monitoring application and activate another, and in this way it is possible to eliminate time that will be lost upon completion and activate these monitoring applications. In other words, it is possible to change channels smoothly. In addition, it is possible to accurately supply key entry information to the playback environment that is playing the content. In addition, the transmission content reproduction apparatus may further include: a selection unit that selects a content between the respective contents that complies with the plurality of transmission specifications; a second unit of identification of reproduction environments that identifies a reproduction environment that is capable of reproducing the content selected by the selection unit, from among the plurality of reproduction environments, and a unit of establishment of reproduction environments that cause the reproduction environment identified by the second reproduction environment determination unit reproduces the content selected by the selection unit. In other words, the transmission content reproduction apparatus of the present invention executes in parallel reproduction environments of various transmission systems, receives and reproduces transmissions of the various transmission systems. At the moment when a user selects a channel, the transmission content reproduction apparatus identifies the reproduction environment of the transmission system to which the channel currently being reproduced belongs, and changes the reproduction environment that is playing the channel for the reproduction environment of the transmission system. In this way, the plurality of reproduction environments are in a state in which they can be used in parallel. Therefore, even if a content between the content is selected and the playing environment that is reproducing a content is changed, there is no need to terminate the monitoring application and activate another, and in this way it is possible to eliminate time that will be lost in finishing and activating these monitoring applications. In other words, it is possible to change channels smoothly. In addition, it is possible to adequately reproduce the content in the reproduction environment that meets the transmission specifications for the selected content. Note that the present invention can be achieved not only as the transmission content reproduction apparatus described above, but also, for example, as a method of reproducing transmission contents, a program for it and a recording medium in which the program is stored. As additional information about the technical background of this application, the description of the provisional application of E.U.A. No. 60 / 693,040 filed June 23, 2005, including description, figures and claims, is hereby incorporated by reference in its entirety.

BRIEF DESCRIPTION OF THE FIGURES These and other objects, advantages and characteristics of the invention will become apparent from the following detailed description thereof, taken in conjunction with the attached figures that illustrate a specific embodiment of the invention. Figure 1 is a configuration diagram of a transmission system. Figure 2 is a diagram showing an example of the use of the frequency band used for communication between the system on the transmission station side and the terminal devices. Figure 3 is a diagram showing an example of the use of the frequency band used for communication between the system on the transmission station side and the terminal devices. Figure 4 is a diagram showing an example of the use of the frequency band used for communication between the system on the transmission station side and the terminal devices. Figure 5 is a configuration diagram of a TS package prescribed in the MPEG-2 specifications. Figure 6 is a schematic diagram of the transport stream MPEG-2. Figure 7 is a diagram showing an example of division at the time when a PES package prescribed in the MPEG-2 specifications is transmitted using TS packets. Figure 8 is a diagram showing an example of division at the time when an MPEG-2 section prescribed in the MPEG-2 specifications is transmitted using TS packets. Figure 9 is a diagram showing a structure of the MPEG-2 section prescribed in the MPEG-2 specifications. Figure 10 is a diagram showing an example of use of the MPEG-2 section prescribed in the MPEG-2 specifications. Figure 11 is a diagram showing an example of using a PMT prescribed in the MPEG-2 specifications. Figure 12 is a diagram showing an example of using a PAT prescribed in the MPEG-2 specifications. Fig. 13 is a diagram showing an example configuration of the hardware configuration of the transmission reception apparatus (transmitted content playback apparatus). Figure 14 is a diagram showing an example of a front panel of the input unit of the terminal apparatus. Figure 15 is a conceptual diagram representing a sequence of physical connections of the respective devices and the like at the moment when a transmission signal of the cable transmission system is received. Figure 16 is a conceptual diagram representing a sequence of physical connections of the respective devices and the like at the moment when a transmission signal from the terrestrial wave transmission system is received.

Figure 17 is a configuration diagram of a program in a transmission reception terminal where the cable television transmission system and the terrestrial transmission system coexist. Figure 18 is a diagram showing constituent elements provided with a library. Figure 19 is a diagram showing the internal structure of an AM. Figure 20 is a diagram showing an example of information contained in a library. Figure 21 is a diagram showing a list of transmission system information contained by a library. Figure 22 is a schematic diagram representing the contents of an AIT. Figure 23 is a schematic diagram representing a downloaded file system. Figure 24 is a diagram showing channel identifiers contained by retention units or containment of channel identifiers. Figure 25 is an example of a visual screen presenter to cause a user to select a TV program. Figure 26 is an example of a visual screen presenter to cause a user to select a TV program. Figure 27 is a flow chart indicating an example of processing at the time a unit Identification of channel identifiers receives a request for the reproduction of a service. FIG. 28 is a flow chart indicating an example of processing at the time when an event delivery unit receives a key entry from a key entry unit. Fig. 29 is a diagram showing the structure of a program in the transmission reception terminal where the cable television transmission system and the terrestrial transmission system coexist. Figure 30 is a diagram showing the structure of a program at the transmission reception terminal where the cable television transmission system and the terrestrial transmission system coexist. Figure 31 is a diagram showing the internal structure of an event manager. Figure 32 is a diagram showing the internal structure of an AM. Figure 33 is a diagram schematically representing an example of XAIT information and Figure 34 is a diagram representing an example of a state where the XAIT information and the file system are contained in an associated manner.

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for reproducing transmission contents that executes in parallel a plurality of reproduction environments for reproducing respective contents that comply with transmission specifications different from each other. The transmission content reproduction apparatus includes: a reproduction environment identification unit that identifies a reproduction environment for reproducing a selected content; a unit for establishing reproduction environments that reproduces the selected content in the reproduction environment, which has been identified by the identification unit of reproduction environments, among the plurality of reproduction environments that are being executed; an identification unit of current reproduction environments that identifies the reproduction environment to which a key entry is delivered in accordance with the reproduction environment that is currently playing a TV program content, at the moment in which an entry of key is delivered from a user, and a key input supply unit that delivers the key entry to the TV program content that the reproduction environment, which has been identified by the identification unit of current reproduction environments, is playing. The transmission content playback apparatus is capable of seamlessly changing playback environments that reproduce contents of TV programs that meet different specifications and of delivering a key entry to the playback environment by means of which the content of TV programs is currently being reproduced.

First Mode An apparatus and method of a first embodiment of the present invention will be described below with reference to the figures. In this modality, a modality will be described in the case of reproducing contents of TV programs that will be transmitted and received in a transmission system. The present invention is subject to the reproduction of transmitted and received contents using an arbitrary means. Conceivable transmission systems include: a satellite transmission system which is a mode of transmitting a transmission signal to a transmission reproduction apparatus using a satellite; a terrestrial wave transmission system which is a mode of transmitting a terrestrial signal to a transmission receiving apparatus using a terrestrial wave signal transmission apparatus; a cable television transmission system which is a mode of transmitting a transmission signal to a transmission reception apparatus using a distribution center and the like. However, a modality in which the cable television transmission system and the terrestrial transmission system coexist is described as an example in this modality. A transmission reception apparatus (transmission content reproduction apparatus) of the present invention is generally called a terminal apparatus. Figure 1 is a block diagram showing a relationship between apparatuses that configure a transmission system; the transmission system is configured by a system on the side of the transmission station (system on the side of the transmission station) 101, and three terminal apparatuses of a terminal apparatus there, a terminal apparatus B112 and a terminal apparatus C113. A connection 121 between the system on the side of the transmission station and each of the terminal apparatuses can be either wired or wireless. For example, in the cable transmission system, the system on the side of the transmission station and each of the terminal devices are connected by cables. On the other hand, in satellite and terrestrial systems, there is no wired connection between the system on the side of the transmission station and each of the terminal devices in the outward direction (from the system on the side of the transmission station to each terminal devices), and a transmission signal is transmitted using radio waves. Regarding the inward direction (from each of the terminal devices to the system on the side of the transmission station), the connections can be either a wired connection using a telephone line such as the wired Internet and a wireless connection using wireless communication , and each of the terminal devices transmits information such as user inputs to the system on the transmission station side. In Figure 1, a system on the transmission station side is coupled with three terminal devices, but the number of terminal devices is arbitrary. The system on the transmission station side 101 transmits information such as video, audio, data for data transmission in a transmission signal to a plurality of terminal devices. The transmission signal is transmitted using a frequency within a frequency band defined by the operational regulations of the transmission system, the laws of a country and a region in which the transmission system is operated, and so on.

As an example, there is shown here a transmission signal transmission requirement that refers to the cable transmission system. In the cable transmission system of this mode, the frequency band used in the transmission of transmission signals is divided for each data content and transmission direction (inward, outward) and the divided frequency bands are assigned to the same. Figure 2 is a graph indicating an example of the division of the frequency band. The frequency band is broadly divided into two types: Out of Band (abbreviation OOB) and In Band. 5 MHz to 130 MHz are assigned as OOB, and are used primarily in the exchange of data between the system on the side of the transmission station 101 and the terminal apparatus there, the terminal apparatus B112 and the terminal apparatus C113 both in the input directions as output. 130 MHz to 864 MHz These are assigned as In-Band and are mainly used in outward-only broadcast channels that include video and audio. The QPSK modulation scheme is used with OOB, and the modulation scheme QAM256 is used with In Band. The technology of modulation schemes is generally known and is of little concern for the present invention, and therefore, its detailed description is omitted. Figure 3 is an example of a more detailed use of the OOB frequency band. 70 MHz to 74 MHz is used in the transmission of data outwards from the system on the transmission station side 101, and all of the terminal apparatus There, the terminal apparatus B112 and the terminal apparatus C113 receive the same data from the system on the side of the transmission station 101. On the other hand, 10.0 MHz to 10.1 MHz are used in the transmission of data inwards from the terminal apparatus there to the system on the side of the transmission station 101; 10.1 MHz to 10.2 MHz are used in inward data transmission from the terminal apparatus B112 to the system on the side of the transmission station 101 and 10.2MHz to 10.3MHz are used in the data transmission inward from the terminal apparatus C113 to the system on the side of the transmission station 101. Through this, it is possible to independently transmit unique data from each terminal apparatus there, B112 and C113 to the system on the transmission station side 101. Figure 4 is an example of use of the frequency band In Band. 150 MHz are assigned to 156 MHz and 156 MHz to 162 MHz to a TV channel 1 and a TV 2 channel, respectively, and subsequently, TV channels are assigned at 6 MHz intervals. Radio channels are allocated in units of 1 MHz from 310 MHz onwards. Each of these channels can be used either for analog transmission or digital transmission. In case of transmitting digital transmission, a TS packet format based on the MPEG-2 specifications is used for transmission, and it is also possible to transmit data for various data transmissions and TV program composition information to configure an EPG, in addition to audio and video. The transmission station side system 101 uses the frequency bands described above to transmit a suitable transmission signal to the terminal devices, and therefore, has a modulation unit QPSK, a modulation unit QAM and so on. In addition, the system on the transmission station side 101 has a QPSK demodulator to receive data from terminal devices. Furthermore, the system on the transmission station side 101 can be thought of as having several devices related to the modulation units and the demodulation unit. However, the present invention relates mainly to terminal apparatuses, and therefore detailed descriptions are omitted. Meanwhile, the terminal devices There, B112 and C113 have a demodulation unit QAM and a demodulation unit QPSK to be able to receive and reproduce a transmission signal from the system on the transmission station side 101. In addition, each terminal apparatus has a QPSK modulation unit for transmitting the unique data for the apparatus to the system on the transmission station side 101. In the present invention, the terminal apparatuses are transmission reception apparatuses, and their detailed configurations are further described. ahead. The system on the transmission station side 101 modulates an MPEG-2 transport stream and transmits the current within the transmitted signal. Each of the terminal devices receives the transmission signal, demodulates the transmitted signal to reproduce the MPEG-2 transport stream, extracts necessary information from it and uses the information extracted. To describe a function of the devices present in the terminal apparatus and the connection structure, the structure of the transport stream MPEG-2 will be briefly described first. Figure 5 is a diagram showing the structure of a TS packet. A TS 500 packet has a length of 188 bytes, and is composed of a header 501, an adaptation field 502 and a payload 503. The header 501 contains control information of the TS packet. The header 501 has a length of 4 bytes, and a structure presented by 504. It has a field indicated as "PacketID" (packet identifier) (hereinafter, PID) and the TS packet is identified based on the value of this PID. . The adaptation field 502 contains additional information such as time information. The adaptation field 502 does not necessarily have to be present, and there are cases in which the adaptation field 502 is not present. The payload 503 contains information transmitted by the TS packet, such as video, audio and data transmission data. Figure 6 is a schematic diagram of an MPEG-2 transport stream. The TS packet contains various information in the payload, such as video, audio and data transmission data and the like. A TS 601 packet and a TS 603 packet contain a PID 100 in the header, and contain information that refers to video 1 in the payload. A TS 602 packet and a TS 605 packet contain a PID 200 in the header, and contain information that refers to data 1 in the payload. A TS 604 packet contains a PID 300 in the header, and contains information that refers to audio 1 in the payload. Mixing TS packets containing various types of data in payloads and transmitting these as a continuous sequence is called multiplexing. A transport stream MPEG-2 600 is a configuration in which the TS packets 601 to 605 are multiplexed. TS packages with identical PIDs contain identical types of information. Therefore, the terminal apparatus reproduces video and audio, composition information of TV programs, upon receiving multiplexed TS packets and extracting, by PID, the information contained by these TS packets. In Figure 6, the TS 601 packet and the TS 603 packet each transmit information that relates to the video 1, and the TS 602 packet and the TS 605 packet each transmit information that relates to the data 1. Here, it is gives a description that refers to formats of various types of data contained in payloads. Video and audio are represented by a format called a packet of Packed Elementary Stream (PES). The PES package includes video information or audio information of a certain period of time, and upon receipt of the PES packet, the transmission reception apparatus may send the video and audio information contained in that PES packet to a visual display screen and a speaker The transmission station transmits the PES packets continuously, and therefore, it is possible for the transmission reception apparatus to continuously reproduce the video and audio without pause. When the PES packet is actually transmitted, the PES packet is divided and stored in the payloads of a plurality of TS packets, in case the PES packet is larger than the payload of a TS packet. Figure 7 shows an example of division when a PES packet is transmitted. A PES 701 package is too large to be stored and transmitted in a payload of a single TS packet, and therefore the PES 701 package is divided into a PES A 702a packet division, a PES B 702b packet division and a PES C 702c packet division, and is transmitted by three TS 703 to 705 packets which have identical PIDs. Actually, video and audio are obtained as an elementary current (ES) which is obtained by connecting data contained in the payloads of a plurality of PES packets. This elementary stream is in the form of digitized video and audio, defined by the MPEG-2 video standard, the MPEG-1 and 2 audio standards, and the like. On the other hand, composition information of TV programs and data used for data transmission are represented using a format called MPEG-2 section. When the MPEG-2 section is actually transmitted, the MPEG-2 section is divided and stored in the payloads of a plurality of TS packets, in case the MPEG-2 section has a size larger than the payload of a TS package. Figure 8 shows an example 'of division when transmitting the MPEG-2 section. As an MPEG-2 801 section is too large to be stored and transmitted in a payload of a single TS packet, the MPEG-2 801 section is divided into a section division A 802a, a section division B 802b and a division of section C 802c, and the section segments are transmitted by three TS 803 to 805 packets which have identical PIDs. Figure 9 presents a structure of this MPEG-2 section. An MPEG-2 900 section is structured by a header 901 and a payload 902. The header 901 contains control information of the MPEG-2 section. that structure of the header 901 is presented by a header structure 903. The payload 902 contains data transmitted by the MPEG-2 900 section. A table identifier (hereinafter, table_id) present in the header configuration 903 represents the type of the MPEG-2 section, and a table identifier extension (hereinafter, table_id_extension) is an extension identifier used when distinguishing more between MPEG-2 sections, with an identical table_id. The case of transmitting the composition information of TV programs is shown in figure 10 as an example of use of the MPEG-2 section. In this example, as written on a line 1004, information necessary for demodulation of the transmission signal is written in the MPEG-2 section that has a table_id of 64 in the header structure 903, and this MPEG-2 section is transmitted more for a TS packet with a PID of 16. The PES format does not exist in the case of the section MPEG-2. For that reason, the elementary current (ES) is a connection of the payloads of the TS packets identified by the identical PIDs within the MPEG-2 transport stream. For example, in Figure 8, all TS 803 to 805 packets, in which the MPEG-2 801 section is divided and transmitted, are identified with the PID of 200. It can be said that this is an ES that transmits the section MPEG-2 801. A concept called program also exists in the MPEG-2 transport stream. The program is expressed as a collection of ESs, and is used in case you want to manage a plurality of ESs all together. With the use of the program, it is possible to manage video and audio, as well as accompanying data transmission data, all together. For example, in the case of managing the video and audio that is desired to be played in parallel, it can be seen that the transmission reception apparatus must play in parallel two of the video ES and audio ES as a program when grouping these ESs as a program. To represent the program, two tables, calls Program Map Table (PMT) and a Program Association Table (PAT) are used in MPEG-2. For detailed descriptions, refer to the specifications of ISO / IEC 13818-1, and the "MPEG-2 Systems". The PMT and the PAT are briefly described below. The PMT is a table included in the MPEG-2 transport stream, in a number as wide as those of the programs. The PMT is structured as an MPEG-2 section, and has a table_id of 2. The PMT contains a program number used to identify the program and additional program information, as well as information that refers to an ES that belongs to the program . An example of the PMT is given in Figure 11. 1100 It is a program number. The program number is assigned only to programs in the same transport stream, and is used to identify the PMT. Lines 1111 to 1114 represent information that refers to individual ESs. A column 1101 is a type of ES, in which "video", "audio", "data" and so on are specified. A column 1102 is the PID of the TS packets that configure the ES. A column 1103 is additional information that refers to the ES. For example, the ES shown on line 1111 is an audio ES, and is transmitted by the TS packets with a 5011 PID. The PAT is a table, which is uniquely present, in the MPEG-2 transport stream. . The PAT is structured as an MPEG-2 section, has a table_id of 0, and is transmitted in the TS packet with a PID of 0. The PAT contains a transport stream identifier (hereinafter, transport_stream_id) used for the identification of the MPEG-2 transport stream, and information that refers to all the PMTs that represent a program in the MPEG-2 transport stream. An example of the PAT is provided in figure 12. 1200 is a transport_stream_id. The transport_stream_id is used to identify the MPEG-2 transport stream. Lines 1211 to 1213 express information that refers to the program. A column 1201 indicates a program number. A column 1202 indicates the PID of the TS packet that transmits the PMT that corresponds to the program. For example, the PMT of the program shown on line 1211 has a program number of 101, and the corresponding PMT is transmitted by the TS packet with a PID 501. In case the terminal apparatus reproduces a certain program, the terminal apparatus specifies the video and audio that make up a program, with reference to the PAT and the PMT, and reproduce that video and audio. For example, with respect to the transport stream MPEG-2 transmitted by the PAT in Figure 12 and the PMT in Figure 11, the following procedure is taken in case the video and audio belonging to the program with a number of 101 program are played. First, a PAT transmitted as an MPEG-2 section with a table_id of "0" is obtained from a TS packet with a PID of "0". A program with program number "101", it is searched based on the PAT and line 1211 is obtained. From line 1211, the PID "501", of the TS package that transmits the PMT of the program with a program number "101" is obtained. Then, the PMT transmitted as the MPEG-2 section with a table_id of "2" is obtained from the TS packet with the PID of "501". Line 1111, which is audio information ES, and line 1112, which is video information ES, are obtained from the PMT. A PID "5011" of the TS packet transmitting the audio ES is obtained from the line 1111. In addition, a PID "5012" of the TS packet transmitting the video ES is obtained from the line 1112. Afterwards, a packet is obtained Audio PES of the TS package with a PID "5011" and a PES package of video of the TS package with a PID of "5012" is obtained. Through this, it is possible to obtain the ES video and audio packages that will be reproduced, and the video and audio that configures the program number 101 can be reproduced. Note that there are cases in which the MPEG-2 transport stream is randomized. This is a mechanism called conditional access system. For example, by randomizing PES packets that transmit certain video and audio information, it becomes possible to allow only specific observers who can descramble them to see that video and audio information. To descramble them and watch video and audio, an observer must descramble them using a device called descrambler. For example, in a terminal device compatible with OCAP, a card-type adapter with an integrated descrambler is used. A cable television operator supplies an adapter configured to be able to descramble a specified program for each observer, and the observer inserts that adapter into the terminal apparatus. After doing so, the adapter descrambles the specific program based on descrambling information such as a descrambling key and contract information from each contract holder. A descrambling method, a method for obtaining the descrambling key and the like, are dependent on the adapter, and have no influence on the embodiment of the present invention. A transmission signal in the terrestrial transmission system is transmitted in a form of TS packets based on the MPEG-2 specifications similar to the cable transmission system mentioned above. Accordingly, a terminal apparatus having a hardware configuration similar to that of the cable transmission system can receive a transmission signal from the terrestrial transmission system. It is assumed in the present invention that the terminal apparatus receives transmission signals from both the cable transmission signal and the ground-wave transmission system and the transmission signals from both the cable transmission system and the ground-wave transmission system can received and played back by a common hardware configuration. However, it is assumed that the transmission signal of the terrestrial transmission system is not randomized. Accordingly, it is unnecessary to use an adapter in a hardware configuration in the case of receiving a transmission signal from the terrestrial transmission system. A hardware connection at the time of receiving transmission signals from the cable transmission system and the terrestrial transmission system will be described below. So far, the MPEG-2 specifications have been briefly described, and detailed definitions of the terminology are given below. In the present invention, there are two types of the term "program". One is a "program" that appears in the MPEG-2 specifications, and the other is a "program" that refers to an assembly of codes executed by a CPU. Since the former is synonymous with the term "service" used in the operating regulations, hereafter, to avoid confusion, the former is called "service" and the latter is simply called "program". further, with reference to the latter, a "program" written particularly in the Java language is called a "Java program". Various types of general information specified in the MPEG-2 specifications, according to the present invention have been described above. Hereinafter, the transmission reception terminal used in the present embodiment is described in detail. Figure 13 is a block diagram showing a general hardware configuration of the transmission reception apparatus (transmission content reproduction apparatus) of this mode; in other words, a specific internal configuration of the terminal apparatuses 111, 112 and 113 shown in Figure 1. 1300 is the transmission reception apparatus, which is configured by: a tuner 1301; a TS decoder (TS demultiplexer) 1302; an AV 1303 decoder; a loudspeaker 1304; a visual presenter 1305; a CPU 1306; a second memory unit 1307; a first memory unit 1308; a ROM 1309; an input unit 1310 and an adapter 1311. Note that the present embodiment is obtained by expanding a transmission reception terminal achieved by the OCAP / OCAP-DVR specifications and the basic hardware configuration is almost identical to that required by the OCAP / specifications. OCAP-DVR. The tuner 1301 is a device that demodulates a transmission signal modulated and transmitted from the system on the transmission station side 101, according to tuning information including a frequency prewritten by the CPU 1306. It is assumed that in this embodiment a only tuner 1301 can demodulate both cable transmission and terrestrial wave transmission by setting suitable modulation and demodulation parameters for tuner 1301. In case a transmission signal from the cable transmission system is received, a transport stream MPEG-2 obtained as a result obtained from the demodulation carried out by the tuner 1301, passes through the adapter 1311 having a descrambling function, and is transmitted to the decoder of TS 1302. On the other hand, in case a signal transmission system of the ground-wave transmission system is received, a current of MPEG-2 support obtained as a result of the demodulation by the tuner 1301 is transmitted directly to the TS 1302 decoder without passing through the adapter 1311 with a descrambling function. The TS 1302 decoder is a device that has a function of segregating PES packets and MPEG-2 sections that meet the specified conditions of the MPEG-2 transport stream, based on a PID, a section filter condition and so on. successively prescribed by the CPU 1306. In the event that a cable transmission is received and a service is reproduced, the transport stream MPEG-2 sent by the adapter 1311 is input to the decoder of TS 1302. On the other hand, in case of that a terrestrial wave transmission is received and a service is reproduced, the transport stream MPEG-2 sent by the tuner 1301 is input to the decoder of TS 1302. The PES packets of the video and audio segregated by the decoder of TS 1302 are sent to the AV decoder 1303. In addition, the MPEG-2 section segregated by the TS decoder 1302 is transferred to the first memory unit 1308 through direct memory access (DMA), and is used by a program executed by the CPU 1306. The decoder AV 1303 is a service with a function of decoding the ES of video and ES of audio encoded. The AV decoder extracts the ES from the PES packet that transmits the audio and video information transmitted from the TS decoder, and decodes the ES. An audio signal and a video signal obtained through the decoding carried out by the AV decoder 1303 are sent to the loudspeaker 1304 and the visual presenter 1305 at the time of service reproduction, the loudspeaker 1304 reproduces the audio sent from the AV decoder 1303. The visual presenter 1305 plays video sent from the AV decoder 1303. The CPU 1306 executes a program operating in the transmission reception apparatus. The CPU 1306 executes a program contained in the ROM 1309. Otherwise, the CPU 1306 executes a program downloaded from a transmission signal or a network and contained in the first memory unit 1308. Otherwise, the CPU executes a program downloaded from a transmission signal or from a network and contained in the second memory unit 1307. The I tuner 1301, decoder of TS 1302, decoder AV 1303, speaker 1304, visual presenter 1305, second memory unit 1307, first memory unit 1308, ROM 1309, input unit 1310, adapter 1311, AV 1312 encoder and multiplexer 1313 are controlled in accordance with the addresses of the program that will be executed. In addition, the CPU 1306 is able to control the adapter 1311 by communicating not only with the devices present within the terminal apparatus 1300, but also with the devices that are present within the adapter 1311. The second memory unit 1307 is a memory device wherein the memory is not erased even if the supply of light energy to the device is interrupted. This second memory unit 1307 is configured of devices when the information is not erased even if the power supply to the terminal apparatus 1300 is cut off; for example, a non-volatile memory such as a FLASH-ROM, a hard disk drive (HDD), a rewritable medium such as a CD-R and a DVD-R. The second memory unit 1307 stores information according to an instruction from the CPU 1306. The first memory unit 1308 is a device having a function of temporarily storing information according to an instruction coming from the CPU 1306, a transferable device. by DMA, and so on, and is configured of a RAM or the like.

ROM 1309 is a non-rewritable memory device, and to be more specific, it is configured of a ROM, a CD-ROM, a DVD, and the like. The program executing the CPU 1306 is stored in the ROM 1309. The input unit 1310 is, to be more specific, configured from a front panel or a remote control receiver, and accepts a user input. Figure 14 is an example in case the input unit 1310 is configured by front panel. A front panel 1400 has seven buttons: a cursor up button 1401, a cursor down button 1402, a left cursor button 1403, a right cursor button 1404, an OK button 1405, a cancel button 1406 and an EPG 1407 button When the user presses a button, an identifier of the button pressed is notified to the CPU 1306. The adapter 1311 is a device for descrambling a randomized MPEG-2 transport stream that will be transmitted in the frequency band In Band, and includes one or more descramblers. The transport stream MPEG-2 sent by the tuner 1301a is input to the adapter 1311, and the TS packet having the PID specified by the CPU 1306 is descrambled. The adapter 1311 sends the descrambled MPEG-2 transport stream to the TS decoder 1302. In addition, the adapter 1311 performs format conversion of data that will be transmitted in an OOB frequency band at the time of receiving a transmission signal from the transmitter. cable transmission system. The information that will be transmitted in the OOB frequency band can be modulated by the QPSK modulation scheme. With respect to the outward transmission, the scrambler QPSK 1301b demodulates the signal transmitted from the system on the transmission station side 101, and inputs the bitstream generated in the adapter 1311. The adapter 1311 extracts information specified by the CPU 1306 from among various types of information included in the bitstream, it converts the information into a format that can be interpreted by a program operating on the CPU 1306, and provides this to the CPU 1306. On the other hand, with respect to the transmission to in, the CPU 1306 enters, in the adapter 1311, information that is desired to be transmitted to the system of the transmission station side 101. The adapter 1311 converts the information entered from the CPU 1306 into a format that can be interpreted by the system of the side of transmission station 101, and send this to the QPSK 1301c modulator. The QPSK modulator 1301c modulates by QPSK the information entered from the adapter 1311, and transmits this to the system on the transmission station side. A CARD Cable, formerly called an Installation Point (POD), used in the United States cable system, may be provided as a specific example of the 1311 adapter. The manner in which the transmission receiving apparatus described above operates the reproduction of a service contained in a transmission wave will be described in detail below. Figure 15 shows a conceptual production representing the sequence of physical connections, processing details and data format of input and output of each device at the moment in which a transmission signal of the cable transmission system is received. 1500 is a terminal apparatus, and includes: tuner 1301; to adapter 1311; a descrambler 1501; to the TS 1302 decoder; a PID filter 1502; a section filter 1503; to the AV 1303 decoder; to loudspeaker 1304; to the visual host 1305 and to the first memory unit 1308. The constituent elements in figure 15 having the same reference numbers as those of figure 13 have the same functions and thus their descriptions are omitted. The tuner 1301 carries out tuning of the transmission wave according to a tuning instruction provided by the CPU 1306, in case a transmission signal of the cable transmission system is received. The tuner 1301 demodulates the transmission wave and enters the transport stream MPEG-2 in the adapter 1311. The descrambler 1501, which is inside the 1311 adapter, desalts the MPEG-2 transport stream based on conditional access information for each observer. The descrambled MPEG-2 transport stream is entered into the TS decoder. Two types of devices that process the MPEG-2 transport stream are present within the TS 1302 decoder: the PID filter 1502 and the section filter 1503. The PID filter 1502 extracts, from the input stream MPEG-2 input, a TS packet that has a PID specified by the CPU 1306, and then extracts a PES packet and an MPEG-2 section present in that payload. For example, when the transport stream MPEG-2 in Figure 6 is entered in the case in which the CPU 1306 has instructed PID filtering that extracts the TS packet with a PID = 100, packets 601 and 603 are extracted, then connected, and in this way a PES of a video 1 is reconfigured. Otherwise, when the MPEG-2 transport stream in Figure 6 is entered in the case where the CPU 1306 has instructed PID filtering to extract the TS packet with a PID = 200, packets 601 and 603 are extracted, then connected and in this manner a MPEG-2 data section 1 is reconfigured. The section filter 1503 extracts, from between the MPEG-2 sections entered, the MPEG-2 section conforming to a section filtration condition specified by the CPU 1306 and transfer this MPEG-2 section by DMA to the first memory unit 1308. For example, it is assumed that the CPU 1306 specifies for the section filter 1503, PID filtering that extracts the TS packet with a PID = 200 and section filtering that extracts a section with a table_id of 64. As mentioned above, after the MPEG-2 section of the data 1 is reconfigured, the section filter 1503 extracts only the section with a table_id of 64 from those MPEG- sections 2, and transfer by DMA this to the first memory unit 1308. The MPEG-2 section entered in the first memory unit 1308 is input to the CPU 1306 as appropriate. A video PES packet and an audio PES packet extracted by the TS 1302 decoder are input to the AV 1303 decoder. The video PES and audio PES entered into the AV 1303 decoder are decoded and sent as an audio signal and a video signal Subsequently, the audio signal and the video signal are input to the visual presenter 1305 and speaker 1304, and in this way the audio and video are played. Figure 16 shows a conceptual elaboration that represents the sequence of physical connections, processing details and input and output data format of each device in case a transmission signal of the terrestrial wave transmission system is received. Among the constituent elements of Figure 16, the constituent elements having the same functions equivalent to those of Figure 15 are provided with the same reference numerals, and the descriptions of them are omitted. In addition, a physical connection order, processing details and input and output data format of the respective devices equivalent to those of Figure 15 are also omitted, and only the differences will be described. The tuner 1301 carries out tuning of the transmission wave according to a tuning instruction specified by the CPU 1306 first, in case a transmission signal from the terrestrial transmission system is received. The tuner 1301 demodulates the transmission wave and inputs the transport stream MPEG-2 into the decoder of TS 1302. The sequence of connections and processing details of the respective devices shown in figure 15 and figure 16 are changed depending on a type of a received transmission signal. In other words, in case of receiving a transmission signal from the cable transmission system, the CPU 1306 carries out adjustments of the hardware constituent elements shown in Figure 13 in such a way that a desired service is reproduced in accordance with the sequence of connections and processing details of the respective devices shown in Figure 15. On the other hand, in case of receiving a transmission signal from the terrestrial transmission system, the CPU 1306 carries out adjustments of the hardware constituent elements shown in figure 13 so that a desired service is reproduced according to the sequence of connections and processing details of the respective devices shown in Figure 16. So far, an example of a hardware configuration that relates to the present invention has been described. Hereinafter, a main function of the present invention is described, which is the control of the reproduction of a service by means of a Java program. The reproduction of the service in the present invention refers to the execution and reproduction of the video, audio, a Java program contained in a transmission wave, based on the synchronization information. Figure 17 is a configuration diagram of a program necessary for the reproduction of the service at a transmission reception terminal where the cable television transmission system and the terrestrial transmission system coexist, and it is software recorded in the ROM 1309. A program 1700 is formed of an OS 1701, an EPG 1702, a Java VM 1703, a Java library 1704 and a landwave browser 1705, which are subprograms. OS 1701 is an Operating System; Linux, Windows, and the like are examples. OS 1701 is configured by: a core 1701a to execute other subprograms such as EPG 1702 and Java VM 1703; and a library 1701b used by the subprograms to control the constituent elements of the terminal apparatus 1300. The core 1701a is publicly known technology and therefore its detailed description is omitted. Among the constituent elements provided with the library 1701b, Figure 18 shows only the constituent elements that are closely related to the present invention. The library 1701b includes a hardware tuning unit for cables 1821a, a hardware tuning unit for land waves 1821b, a key entry unit 1822, a hardware tuning information retaining unit 1823, and a retention unit for channel identifiers 1824. The hardware adjustment unit for cables 1821a performs adjustments of the connection between the hardware constituent elements shown in Figure 13 so that the service is reproduced through a channel shown in Figure 15, each once the channel reproduction unit 1812 makes a request that the service belonging to the cable transmission system be reproduced. The hardware setting unit for land waves 1821b receives a channel identifier and a PID from the reproduction unit of landwave channels 1831b. Each time the 1821b hardware adjustment unit is asked to carry hardware connection settings and value adjustments in such a way that the service belonging to the terrestrial transmission system is reproduced, it carries out connection adjustments between the elements hardware constituents, tuner tuning information settings and PID settings to the TS decoder shown in Fig. 13 in such a way that the service is reproduced in the channel shown in Fig. 16. In addition, it causes the 1823 hardware adjustment information retention retains the details of settings provided with the respective hardware constituent elements. The tuning details include tuning information that is adjusted in the tuner and the PID that is adjusted in the TS decoder. The key input unit 1822 receives a key entry from the input unit 1310, and requests an event supply unit 1801 from a 1704m event handler to supply a key event corresponding to the key entered. The supply of events by the event supply unit 1801 will be described below. The hardware adjustment information retaining unit 1823 contains a hardware adjustment unit for cables 1821a, a JMF 1704a, a tuner 1704c and a value that establishes a hardware adjustment unit for land waves 1821b in the hardware. After receiving a request from the current channel determination unit 1801, it returns the tuning details provided with the respective hardware constituent elements such as the PID that is established in the TS decoder and the information that is frequently set in the tuner . The channel identifier retention unit 1824 contains a channel identifier specified by the channel reproduction unit 1812 or the reproduction unit of landwave channels 1831b. More specifically, a channel identifier "1" is specified from the channel reproduction unit 1812 with reference to FIG. 24, contains "1" as shown (1) in FIG. 24. Subsequently, in case an identifier channel "101" specified from the reproduction unit of landwave channels 1831b, contains "101" as shown in (2) in figure 24. In addition, after receiving the request from the current channel determination unit , the channel identifier retention unit 1824 returns the channel identifier that it is currently containing. The 1701b library is provided with several functions, which are not shown in the figures, in addition to those functions. The library 1701b provides, for example, a tuning function to control the tuner. The library 1701b accepts, from another subprogram, tuning information including a frequency, and passes the information to the tuner 1301. The tuner 1301 performs demodulation processing based on the tuning information provided, and the MPEG transport stream can pass. -2 demodulated to the TS decoder 1302. As a result, other subprograms can control the tuner 1301 through the library 1701b. Also, library 1701b provides channel information to uniquely identify a channel. An example of the channel information is shown in Figure 20. The channel information is transmitted using an OOB or a band of frequencies In Band, it is converted into a table format by the adapter 1311, and is stored in a unit of temporary memory accessible by the library. A column 2001 is a channel identifier, and is equivalent to, for example, an originator identifier (source ID) as defined by the Service Information SCTE65 Supplied Out of Band for Digital Cable Television. A 2002 column is a channel name and is equivalent to a source_name (source name), as defined by the SCTE65 standard. A column 2003 is tuning information, and is information such as a frequency, a rate of transfer, a modulation rate and the like provided to the tuner 1301. A column 2004 is a program number for specifying the PMT. For example, a line 2011 is a group of service information with a channel identifier of "1", a channel name of "channel 1", tuning information that includes a frequency of "150 MHz ..." and a program number of "101". Similarly, library 1701b provides transmission system information to which the channel identifier belongs. Figure 21 is a list of transmission system information containing the library 1701b. A column 2101 is a channel identifier, and a column 2102 is a transmission system to which the channel identifier belongs. For example, a line 2115 shows that the channel identifier "101" belongs to the "terrestrial wave transmission system". In addition, the library 1701b can adjust parameters to control the hardware constituent elements shown in FIG. 13. The functions Individuals are described later. The Java VM 1703 is a Java virtual machine that sequentially analyzes and executes programs written in the Java ™ language. Programs written in the Java language are compiled from intermediate codes, called byte codes, that do not depend on hardware. The Java virtual machine is an interpreter that executes these byte codes. The Java VM 1703 runs the Java 1704 library that is written in the Java language. For details of the Java language and the Java VM, refer to publications such as "Java Language Specification" (ISBN 0-201-63451-1) and "Specification of Java Virtual Machines" (ISBN 0-201-63451-X). In addition, it is possible to invoke or be invoked by other subprograms not written in the Java language through a native Java interface (JNI). For details of the JNI refer to the book "Native Java Interface" and so on. The Java library 1704 is a library written in the Java language and is invoked by the Java program to control functions of the transmission reception apparatus. However, there are situations in which a subprogram not written in the Java language, such as a 1701b library of OS 1701, is used as necessary. The Java program can use a function provided by the Java 1704 library by invoking a Java Application Programming Interface (Java API) contained by the Java 1704 library.

A tuner 1704c is a Java library for controlling the In-Band reception tuner 1301a at the transmission reception terminal. When the Java program such as the channel reproduction unit 1812 passes tuning information including a frequency to the tuner 1704c, the tuner 1704c sets the tuning information received in the tuner 1301 through the library 1701b. As a result, it can control the operation of the tuner 1301a to receive In-Band signals from the transmission reception terminal. In addition, the tuner 1704c causes the hardware setting information retaining unit 1823 to retain the tuning information that is set in the tuner 1301, for example, the frequency information that is set in the tuner. An SF 1704e is a Java library for controlling a function of the PID filter 1502 and the filter section 1503 of the transmission reception terminal. When the Java program passes filtration conditions such as a PID, table_id and similar to the SF 1704e, the SF 1704e establishes, based on the past filtration conditions, filtering conditions in the PID filter 1502 and the filter section 1503 using a function of the library 1701b to thereby control the PID filter 1502 and the section filter 1503, obtain MPEG-2 sections that satisfy desired filtration conditions and pass the MPEG-2 sections to the Java program that has established the filtering conditions. A DSM-CC 1704d is a Java library to access a file system of a DSM-CC object carousel. The DSM-CC object carousel is included in the MPEG-2 section that will be obtained by the SF 1704e. The DSM-CC is defined by ISO / IEC13818-6, and is a mechanism for transmitting an arbitrary file, using the MPEG-2 section. By using this system, it is possible to transmit a file from a transmission station to a terminal. The DSM-CC 1704d obtains the MPEG-2 section using the SF 1704e, based on a file identifier specified by a Java program or similar, it outputs a file based on ISO / IEC13818-6, and sends the file to the first memory unit 1308. A detailed method for implementing the DSM-CC has no relation to the present invention and therefore its details are omitted. An AM 1704b is an application manager that provides a function to manage the execution and termination of Java programs downloaded from cable transmission waves. Java programs downloaded from cable transmission waves include: a Java program that is included in a service and is executed at the time the service is selected and a Java program that is not included in a service and is executed without import the service selection, in other words, the last Java program is not finished even when the services are changed. The first Java program is downloaded according to the information described in AIT and is executed. The last Java program is downloaded and according to the information written in XAIT and executed. The AIT and the XAIT will be described later. First, a function of the AM 1704b is described when downloading, executing and terminating a Java program included in a service according to the information described in the AIT. The AM 1704b extracts a Java program multiplexed on a specified channel from an MPEG-2 transport stream of the cable transmission sent from the adapter 1311. It executes or terminates the extracted Java program according to the synchronization information that has been multiplexed by separated. A Java class file of the Java program is multiplexed into the transport stream MPEG-2 in the DSM-CC format mentioned above. In addition, the synchronization information of the Java program is multiplexed into the transport stream MPEG-2 in a format called AIT.

AIT is the abbreviation of application information table, as defined in chapter 10 of the DVB-MHP standard (ETSITS 101812 DVB-MHP specification Vl.0.2), and it is an MPEG-2 section with a table_id of "0x74". In this modality, the AIT defined by the DVB-MHP standard is modified for use. Among the internal elements of the AM 1704b, only the elements that are closely related to the functions at the time of the download, execution and termination of the Java program included in the service will be shown in figure 19. The AM 1704b is configured by a unit A31 1931 monitoring system and an application status management unit 1932. The AIT 1931 monitoring unit has an MPEG-2 transport stream of the cable transmission and the channel identifier as inputs, and monitors the update status of the device. the AIT. First, the JMF 1704b searches the library 1701b for channel information using a channel identifier specified as a key, and obtains the program number. Then, using the SF 1704e and the like, the PAT of the MPEG-2 transport stream is obtained. In addition, the PID of a PMT that corresponds to the program number obtained is obtained from the information of the PMT. It is in a format like the one shown in figure 11, and the PIDs of elementary streams that have "data" as current type and "AIT" as complementary information are written there using the SF 1704e again. Moreover, when the SF 1701e is provided with the PID and table_id "0x74" of the AIT obtained now as the filtering conditions, the details of the AIT can be obtained.

Fig. 22 is a graph schematically showing an example of AIT information. The AIT 2200 version represents the version of that AIT. The higher the version of the AIT, the more recent the AIT will be. An AIT with the same version of AIT is received repeatedly, but AM 1704b does not analyze an AIT with the same version of AIT as an AIT that has already been analyzed, but only analyzes an AIT that is more recent than the AIT already analyzed and carries out the corresponding processing. A column 2201 is a program identifier Java. A column 2202 is control information of the Java program. In the control information, there is "autostart", "present", "delete" and the like; "auto start" means that the terminal apparatus 1300 executes the Java program automatically in an instant, "present" means that no automatic execution is carried out, and "delete" means stopping the Java program. A column 2203 is a DSM-CC identifier to extract the PID that includes the Java program in the DSM-CC format. A column 2204 is a program name of the Java program. The lines 2211, 2212, 2213 and 2214 are a group of the information of the Java program. The Java program defined by line 2211 is a group that includes a Java program identifier "0x3221", "autostart" control information, a DSMCC identifier "1" and a program name "a / TopXlet". Similarly, the Java program defined by line 2212 is a group that includes a Java program identifier "0x3222", "present" control information, a DSMCC identifier "1" and a program name "a / GameXlet" . Here, the three Java programs defined by lines 2211, 2212 and 2214 have the same DSMCC identifier. This indicates that three Java programs are included in a file system encoded in the DSM-CC format. Here, four types of information are pre-written for the Java program, but in reality, more types of information are defined. Details can be found in the DVB-MHP standard. The application status management unit 1932 analyzes the updated AIT content, and manages the execution status of the Java program based on the details of the AIT. First, the operation of managing the state of a Java program is described below. The application status management unit 1932 finds a Java program whose control information is "auto-start" from among the AITs, and extract the corresponding DSMCC identifier and Java program name. Referring to Figure 22, AM 1704b extracts the Java program from line 2211, and obtains the DSMCC identifier of "1" and the Java program name "a / TopXlet". Then, the AM 1704b uses the DSMCC identifier obtained from the AITs to obtain, from the PMT, the PID of the TS packet that stores the Java program in the DSMCC format. Specifically, the PID of the elementary stream with a DSMCC identifier that complies with the supplementary information and with a type of "data" stream is obtained from among the PMTs. Here, assuming that the DSMCC identifier was "1", and the PMT was like that shown in Figure 11, the elementary streams of line 1114 conform to them, and the PID "5014" is extracted. The AM 1704b specifies, to the SF 1704e, the section filtration conditions and the PID of the TS that transmits the MPEG-2 section in which the data is inserted in the DSMCC format. Here, the PID "5014" is provided. As a result, the AM 1704b can collect the necessary DSMCC MPEG-2 sections. The AM 1704b reconstructs the file system from the MPEG-2 sections collected according to the DSMCC format, and stores the file system in the first memory unit 1308. The data extraction such as the file system of the TS packet in the MPEG-2 transport stream and save the data in a storage medium such as the first memory unit 1308 and the second memory unit 1307 is hereinafter called download.

Figure 23 is an example of a downloaded file system. In the diagram, a circle represents a directory and a square represents a file. 2301 is a root directory, 2302 is a "a" directory, 2303 is a "b" directory, 2304 is a "TopXlet. Class" file, 2305 is a "GameXlet. Class" file, 2306 is a "z" directory , 2307 is a "MusicXlet. Class" file and 2308 is a "StudyXlet. Class" file. Then, from among the file systems downloaded in the first memory unit 1308, the AM 1704b passes the Java program that will be executed to the Java VM 1703. Here, assuming that the name of the Java program that is executed is "a / TopXlet ", the file" a / TopXlet. class ", with" .class "added to the end of the Java program name, is the file that will be executed. "/" is a delimiter between directory and file names, and file 2304 is the Java program that must be executed with reference to figure 23. Next, AM 1704b passes to file 2304 to Java VM 1703, and the file is executed, like a Java program in the Java VM. Each time the AM 1704b receives an AIT with a new version of AIT, it analyzes the AIT and changes the execution status of the Java program. The functions described above are the functions carried out by the AM 1704b according to the information described in the AIT when it downloads, executes and terminates the Java program contained in the service. The functions described below are the functions performed by the AM 1704b with the information described in the XAIT when downloading, executing and terminating the Java program that is not included in a service, and executing a selection of the service, in other words, it is not concluded even if the services are changed. Among the internal constituent elements of the AM 1704b, figure 32 shows only the constituent elements that are closely related to the functions in the download, execution and termination of the Java program that is not included in a service, and is executed nonetheless a selection of the service, in other words, not It is finished even if the services are changed. The AM 1704b is configured by an XAIT 3231 monitoring unit and an independent 3232 application status management unit. The XAIT 3231 monitoring unit can obtain system information from the transmission station side 101 by communicating with the system on the transmission station side 101 through the library 1701b. This bidirectional communication can be achieved by the demodulation unit QPSK 502 by means of the library 1701b of the OS 1701 and the adapter 1311. The monitoring unit of XAIT 3231 receives, from the system of the transmission station side 101 using this communication, information of the Java ™ program to be executed or which the terminal apparatus 1300 stores in the second memory unit 1307. This information is known as an XAIT information. The XAIT information is transmitted between the system on the transmission station side 101 and the adapter 1311 in an arbitrary format. The present invention can be implemented notwithstanding which transmission format is used, as long as information required for XAIT information is contained. Figure 33 is a diagram schematically showing an example of the XAIT information obtained from the transmission station side system 101. A column 3301 is an identifier of the Java ™ program. A column 3302 is control information of the Java ™ program. The control information includes "auto start", "present" and the like; "auto-start" means that the terminal apparatus 1300 executes this program automatically at the moment when the power is turned on and "present" means that no automatic execution is carried out. A column 3303 is a DSMCC identifier for extracting the PID that includes the Java ™ program in the DSMCC format. A column 3304 is a program name of the Java ™ program. Column 3305 describes the priority of the Java ™ program. The priority is set to determine a Java ™ program that will be executed in case there is a restriction on the executable Java ™ programs. The 2007 column describes the application name of the Java ™ program. The application name is intended to allow a user to identify a Java ™ program. The 2011 and 2012 lines are a group of information on the Java ™ program. The Java ™ program defined by the 2011 line is a group that includes an identifier "701", control information "auto start", a DSMCC identifier "1", a program name "a / APPIXIet", a priority "200" and an application name "APPI". Here, only six types of information are prescribed for the Java ™ program, but the present invention can be implemented even if more types of information are defined. The application name of column 3307 is, for example, a name used to allow a user to identify each Java ™ program described in the XAIT information. However, it should be noted that the present invention can be implemented without any application name, with the proviso that enough information to allow a user to identify a Java ™ program is presented to the user. The 3232 application status management unit analyzes the updated details of the XAIT, and manages the execution status of the Java program, based on the details of the XAIT. The service-independent application status management unit 3232 extracts, downloads and executes the Java ™ program described in the obtained XAIT information of the MPEG-2 transport stream of the cable transmission. After obtaining the XAIT information, the service-independent application status management unit 3232 stores a file system from the MPEG-2 transport stream in the first memory unit 1308, according to the same procedures as the procedures at the time that the service-independent application status management unit 1932 downloaded the Java ™ program from the AIT information. Subsequently, the file system stored in the first memory unit 1308 is copied to the second memory unit 1307. Note that it is possible to directly download the file system to the second memory unit 1307 without passing it through the first memory unit 1307. memory 1308. Then, the service-independent application status management unit 3232 associates the downloaded file storage location with the XAIT information and stores the file system in the second memory unit 1307.

Figure 34 shows an example where the downloaded file system is saved associated with the XAIT information in the second memory unit 510. Since the elements of Figure 34 are provided with the same reference numbers as those in Figure 34 , your descriptions are omitted. A column 3401 saves the storage position of the downloaded file system that corresponds to each Java ™ program. In the figure, these storage positions are shown by arrows. 3410 It is the downloaded file system that stores a top directory 3411, a directory "a" 3412, a directory "b" 3413, a file "APPlXlet. Class" 3414, a file "APP2Xlet. Class" 3415. Here, the information XAIT is saved after the Java ™ program is stored, but it can be saved before the Java ™ program is stored. The XAIT information is stored in the second memory unit 1307, but note that it can be saved in the first memory unit 1308. In case of saving in the first memory unit 1308, all the stored XAIT information is deleted at the moment to turn off the power. Then, with reference to the XAIT information stored in the first memory unit 1308 or the second memory unit 1307, the service-independent application management 3232 administration unit passes the application Java ™ program specified as "auto-start" among the applications downloaded to the Java VM 1703. Referring to Figure 34, the Java ™ "a / APPlXlet" program of the "APPl" application defined by line 2011 is passed to VM 1703. Here, when the name of the Java program that will be executed is "a / APPIXIet", the file "a / APPIXIet. class" to which ".class" is added at the end of the Java program name, is the file that will be executed. The Java VM 1703 runs the Java ™ program of the last application. The functions described above are the functions carried out by the AM 1704b according to the information described in the XAIT when downloading, executing and terminating the Java program contained in the service. The JMF 1704a handles playback control of the video and audio included in the cable transmission service. More specifically, the JMF 1704a enters the ES video and ES audio multiplexed into the specified channel of the MPEG-2 transport stream in the AV decoder, for playback. First, when entering a channel identifier, JMF 1704a looks for channel information in library 1701b using a channel identifier specified as a key, and obtains the program number. Then, using the SF 1704e and the like, a PAT of the MPEG-2 transport stream is obtained. In addition, the PID of the PMT corresponding to the program number obtained is obtained from the information of the PMT. Using the SF 1704e again, the details of the PMT are obtained. The obtained PMT is in a format as shown in Figure 11, and the PIDs of the elementary streams are written as "video" and "audio" which are the current types of the elementary streams. Subsequently, the JMF 1704a establishes these PIDs in the PID filter 1502 of the TS decoder 1302 by means of the library 1701b. As a result, as shown in Figure 15, an ES of video and an audio ES multiplexed with these PIDs are reproduced by means of the AV decoder 1303, the speaker 1304 and the visual presenter 1305. In addition, the JMF 1704a causes a Hardware setup information retention unit 1823 contains a PID, such as a "video" PID, which has been established in the TS decoder. The service manager 1704f manages the reproduction of a service in the MPEG-2 transport stream of the cable transmission. The modality that will be described below is the modality of managing the reproduction of the service within the MPEG-2 transport stream. Figure 18 shows an internal configuration of the service manager 1704f. The service manager 1704f includes a channel identifier determination unit 1811 and a channel reproduction unit 1812. The channel identifier determination unit 1811 of the service manager 1704f has a service channel identifier that will be reproduced as a service identifier. entry. The channel identifier determination unit 1811 of the service manager 1704f receives a service playback request of an EPG upon receipt of the channel identifier. Referring to a list of transmission system information contained by library 1701b and shown in figure 21, the channel identifier determination unit 1811 determines one of the cable television transmission systems and the terrestrial transmission system to which the specified channel identifier belongs. Subsequently, in the event that the result of judging that the specified channel identifier shows the cable transmission system, the channel identifier determining unit 1811 supplies the channel identifier to the channel reproduction unit 1812 and asks it to reproduce the service. On the other hand, the result of judging the specified channel identifier shows the terrestrial transmission system the channel identifier unit 1811 passes the channel identifier to reproduce the service to the reproduction unit of landwave channels 1831b of the terrestrial wave services manager 1831, and makes a request for reproduction of the service belonging to the terrestrial wave transmission system. After receiving the service reproduction request with the specified channel identifier of the channel identifier determination unit 1811 or the landwave channel identifier 1831a, the channel reproduction unit 1812 requests the hardware establishment unit cables 1821a of library 1701b to establish a hardware connection to thus reproduce the service belonging to the cable transmission system using the channel used in figure 15. Subsequently, referring to the guide shown in figure 20 contained by the library 1701b, the channel reproduction unit 1812 obtains tuning information corresponding to the specified channel identifier and specifies the tuning information obtained to the tuner 1704c. Subsequently, the channel reproduction unit 1812 provides the specified channel identifier to JMF 1704a and requests to play the video and audio. Then, through the operation described above, the JMF 1704a begins playback of multiplexed video and audio within the MPEG-2 transport stream of the cable transmission. In addition, the AM 1704b is also provided with the channel identifier of the video and audio that will be reproduced in the MPEG-2 transport stream of the cable transmission. Then, according to the multiplexed AIT in the transport stream MPEG-2, the AM 1704b starts the execution and termination of the Java program multiplexed in the transport stream MPEG-2 of the cable transmission. Subsequently, the channel reproduction unit 1812 requests the channel identifier retention unit 1824 to contain the specified channel identifier. Then, hidden, from the visual presenter 1305, all the programs that include the navigational GUI of terrestrial waves that belong to the system of transmission by terrestrial waves. Then, the channel reproduction unit 1812 visually displays Java programs including the EPG 1702 which belongs to the cable transmission system in the visual presenter 1305, and provides a focus on one of the Java programs. The 1705m event manager receives the key event corresponding to the key entry of the key entry unit of the library, and delivers the key event based on the transmission system to which the service currently being reproduced belongs. More specifically, in the event that a service belonging to the cable transmission system is being reproduced, it provides the key event to EPG 1702. In the event that a service belonging to the terrestrial transmission system is being reproduced provides the key event to the 1705 landwave browser. Figure 18 shows an internal configuration of the 1705m event manager. The event manager 1705m is configured by a current channel determination unit 1801 and an event delivery unit 1802. After receiving a request from the 1802 event delivery unit, the current channel determination unit 1801 determines one of the cable transmission system and the terrestrial transmission system to which the service currently being reproduced belongs, and notifies the result to the 1802 event delivery unit. Here , the determination of a transmission system by the current channel determination unit 1801 is achieved according to the following method, in this mode. After receiving a request from the event delivery unit 1802, the current channel determination unit 1801 makes a request to the channel identifier retention unit 1824 with respect to the channel identifier of the service that has been specified and that is being reproduced currently. The current channel determination unit 1801 determines one of the cable transmission system and the terrestrial transmission system to which the service currently being reproduced pertains by looking up the list of transmission system information shown in Figure 21 using the channel identifier obtained as the key. In this method, the channel identifier of the service that is currently being reproduced, which is contained by the channel identifier retention unit 1824, is the basis of the determination of the transmission system. The event delivery unit 1802 supplies the key event based on the determination of the current channel determination unit 1801. More specifically, after receiving the key event of the 1822 input unit of the library, the delivery unit of events 1802 makes a request to the current channel determination unit 1801 with respect to the transmission system to which the service currently being reproduced belongs. In case the service belonging to the cable transmission system is being reproduced, it converts the key event into the key event defined by the Java AWT, and delivers it to the Java program that belongs to the cable transmission system, being executed in an environment for reproduction of cable transmission, and provided by the focus. On the other hand, in case a service belonging to the transmission system by land waves is being reproduced, it turns the event into the key event that can be interpreted by the programs that include the GUI navigator of land waves 1832 that belongs to the system of transmission by terrestrial waves, and delivers it to the program that belongs to the transmission system by terrestrial waves, in other words, which is being executed in an environment for the transmission of terrestrial wave transmission and is provided by the focus. Here, it should be noted that the present invention can be implemented even if the conversion format of the key event by the event delivery unit 1802 is another format, as long as the event format can be interpreted by the delivery destination. The EPG 1702 (EPG is short for Electronic Program Guide) is a function that allows a user to select a TV program that will be played. The EPG 1702 is a Java program that belongs to the cable transmission system and is being downloaded and executed according to the XAIT information. It is executed independently of the selection of the service, in other words, it does not end even if the services are changed. The reproduction of a TV program selected by the GUI of the EPG 1702 is carried out by means of that channel identifier which is passed to the channel identifier determination unit 1811 of the service manager 1704f and the reproduction of the service is requested. EPG 1702 visually presents a list of broadcast TV programs, and causes the user to select a desired TV program. Figure 25 is an example of a visual screen presenter to allow the user to select a TV program that will be reproduced. One hour 2501 and channels 2502 and 2503 are presented visually in a grid format, and it is possible to review the TV program of each recordable channel in each hour. The EPG can receive the user's key entry through the event delivery unit. Thus, it is possible for the user to move a focus 2530 within the screen using up, down, right and left cursor buttons 1401 to 1404 which are included in the input unit 1310 of the terminal apparatus 1300. Moreover, when the button OK 1405 is pressed, the TV program you focused on is selected to be played. The EPG 1702 obtains the channel identifier of the TV program of the library, and when the TV program to be reproduced is selected by the user, it passes the TV program channel identifier to the channel identification unit 1811 and directs it to reproduce the service. Figure 18 shows an internal configuration of the landwave navigator 1705. The landwave browser 1705 is configured by a landwave services manager 1831 and a landwave navigator GUI 1832. In addition, the landwave services manager 1831 includes a unit for determining landwave channel identifiers 1831a and a reproduction unit for landwave channels 1831b. The 1832 land-based waveguide GUI is an electronic program guide, and has a function that allows a user to select a TV program that will be played. The 1832 land-based waveguide GUI is a program that belongs to the terrestrial wave transmission system. The TV program is played back by passing the channel identifier to the channel identifier determination unit 1831a of the landwave services manager 1831 and asks to reproduce the service. The 1832 landwave navigator GUI visually presents a list of broadcast TV programs, and allows the user to select a desired TV program. Figure 26 is an example of a display screen to allow the user to select the TV program that will be played. One hour 2601 and channels 2602 and 2603 are displayed visually in a grid format, and the user can review the TV programs of each recordable channel in each hour. The 1832 landwave navigator GUI can receive the user's key entry through the event delivery unit. Thus, the user can move a focus 2830 within the display screen using up, down, right and left cursor buttons 1401 to 1404 which are included in the input unit 1310 of the terminal apparatus 1300. Moreover, when the OK button 1405 is pressed, the focused TV program is selected to be played. The landwave navigator GUI 1832 1702 obtains the channel identifier of the library's TV program and knows it. When the TV program to be reproduced is selected by the user, it passes the channel identifier of the TV program to the unit of determination of terrestrial wave channel identifiers 1831a and directs it to reproduce the service. Referring to the list of the transmission system information shown in Figure 21 mentioned above, the landwave channel manager identification unit 1831 of the landwave service manager 1831 determines one of the cable television transmission system and the terrestrial wave transmission system to which the specified channel identifier belongs, at the time of receiving the service playback request of the landwave navigator GUI 1832. Subsequently, in case the result of the determination by the Terrestrial channel channel identifier unit 1831a shows the terrestrial transmission system, the terrestrial channel identifier determining unit 1831a supplies the channel identifier to the terrestrial channel reproduction unit 1831b and asks to reproduce the service . On the other hand, the result of the determination by the terrestrial channel channel identifier unit 1831a, the terrestrial channel channel identifier unit 1831a passes the channel identifier to reproduce the service to the channel reproduction unit 1812 of the service manager 1704f and makes a request to reproduce the service belonging to the cable transmission system. After receiving a service reproduction request with the channel identifier specified from the landwave channel identifier determination unit 1831a or the channel identifier determination unit 1811, the landwave channel reproduction unit 1831b obtains the tuning information corresponding to the channel identifier specified with reference to the guidance shown in figure 20 contained by the library 1701b. In addition, it searches the library 1701b channel identifier using the channel identifier specified as a key, and obtains the program number. Then, using the SF 1704 and the like, a PAT of the MPEG-2 transport stream is obtained. In addition, the PMT corresponding to the program number obtained is obtained from the information of the PMT. Using the SF 1704e again, get the details of the PMT. The obtained PMT has a format of figure 11, and the PIDs of elementary currents are written in this as "video" and "audio" which are the current types of the elementary currents. Subsequently, the reproduction unit of landwave channels 1831b specifies the obtained tuning information and the PIDs to the landwave hardware establishment unit of the library 1701b. The reproduction unit of terrestrial wave channels 1831b requests the hardware establishment unit for ground waves to carry hardware connection settings in such a way that the service belonging to the terrestrial transmission system is reproduced through the channel shown in Figure 16, and the settings of the values to the tuner and the TS decoder.

Subsequently, the reproduction unit of landwave channels 1831b requests the channel identifier retention unit 1824 to contain the specified channel identifier. Then, it hides all the Java programs including the EPG 1702 that belongs to the cable transmission system of the visual presenter 1305. On the other hand, the unit of reproduction of the terrestrial wave channels 1831b visually presents the programs that include the navigational GUI of terrestrial waves. it belongs to the terrestrial wave transmission system in the visual presenter 1305, and provides a focus on one of the programs. The operations characteristic of this mode by the configuration described above will be described below with reference to a flow diagram. Fig. 27 is a flow chart showing an example of processing in case a channel identifier is passed by EPG 1702 to the channel identification identifier unit 1811. After receiving the identifier of EPG 1702 and receiving a service reproduction request (S2701), the channel identifier determining unit 1811 determines the cable television transmission system and the terrestrial transmission system to which the channel identifier (S2702) belongs.

In case the result of the determination shows the cable transmission system (S2703), the channel identifier determination unit 1811 supplies the channel identifier to the channel reproduction unit 1812 and asks to reproduce the service (S2704 ). When the channel identifier is specified and the service reproduction requested by the channel identifier determination unit 1811, the channel reproduction unit 1812 specifies a channel identifier to the cable hardware establishment unit 1821a of the library 1701b and makes a request for hardware connection programming in such a way that the service belonging to the cable transmission system is reproduced through the channel shown in Figure 15 (S2705). Subsequently, the channel reproduction unit 1812 requests the channel identifier retention unit 1824 that contains the specified channel identifier (S2706). The channel reproduction unit 1812 hides the program of the terrestrial transmission system, visually presents the Java program of the cable transmission system and provides a focus (S2707). On the other hand, in case the determination result in S1703 of the channel identifier determination unit 1811 is the terrestrial wave system, the channel identifier determination unit 1811 passes the channel identifier to reproduce the service to the reproduction unit of landwave channels 1831b, and makes a reproduction request for the service belonging to the landwave transmission system (S2708). After receiving a service reproduction request with the specified channel identifier of the channel identifier determining unit 1811, the landwave channel reproduction unit 1831b specifies the channel identifier to the hardware set unit for waves. terrestrial 1821b of library 1701b and makes a request for hardware connection adjustment such that the service belonging to the terrestrial cable transmission system is reproduced through the channel shown in Figure 16 (S2709). Subsequently, the landwave channel reproduction unit 1831b requests the channel identifier retention unit 1824 to contain the specified channel identifier (S2710). The reproduction unit of landwave channels 1831b hides the program of the cable transmission system, visually presents the program of the transmission system by ground waves and provides a focus (S2711). Fig. 28 is a flow diagram showing an example of processing at the time when the event delivery unit 1802 receives a key entry from the key entry unit 1822. Here, the EPG has a focus when the cable transmission is played, and the landwave navigator GUI has a focus when the transmission of terrestrial waves is reproduced. After receiving a key entry from the key entry unit 1822 (S2801), the event delivery unit 1802 makes a request to the current channel determination unit 1801 with respect to the transmission system to which the service that is being currently reproduced belongs (S2802). After receiving the request, the current channel determination unit 1801 determines one of the cable transmission system and the terrestrial transmission system to which the service currently being reproduced belongs, and notifies the result of the determination to the Event delivery unit 1802 (S2803). In case the result of the current channel determination unit 1801 shows the cable transmission system (S2804), the event delivery unit 1802 converts the key event into an event that can be defined in the Java AWT, and delivers it to EPG 1702 (S2805). On the other hand, in case the result of the determination shows the transmission system by land waves (S2804), it converts the key event into an event that can be interpreted by the navigator GUI of land waves 1832 of the navigator of land waves 1705 , and delivers it to the landwave navigator GUI 1832 of the landwave navigator 1705 (S2805). With the modality described above, the following effects can be obtained. A transmission reception apparatus, which receives and reproduces transmission signals of programs that are executed in parallel by several transmission systems to which the programs belong, can without fail change the services of several transmission systems and reproduce these services, in the at which time a service is selected, when determining a specified channel identifier and distributing the channel identifier to a service reproduction function of a suitable transmission system when the channel identifier of a second transmission system is specified by a guide electronic program of a first transmission system. In addition, when determining the transmission system to which the service that is currently being reproduced belongs, using as the key the channel identifier that is currently being specified in the current library and changing the delivery destinations of the key event entered at the time of entry. of key, the transmission reception apparatus can deliver the key event to the program guide of the transmission system to which the service that is currently being owned belongs even in a state in which the electric program guides of the various transmission systems are being executed in parallel.

Second Mode Hereinafter, an apparatus and a method of a second embodiment of the present invention are described with reference to the figures. The hardware configuration, software configuration, various types of data formats of this mode are the same as those of the first embodiment that is not Figure 18. Therefore, Figure 1 to Figure 17, Figure 19 to Figure 1, will be used. 28 and figure 32 to figure 34 used in the first embodiment. The constituent elements in these figures have the same functions as the identical constituent elements in the first modality, and therefore their descriptions are not repeated. Figure 29 shows the parts that are closely related to this modality, in the configuration of the program that is considered as necessary for the reproduction of the service in the transmission reception terminal of this modality wherein the cable television transmission system and The transmission system by land waves coexist. In Fig. 29, the constituent elements other than the current channel determining unit 1801 have identical functions as those of the constituent elements in the first mode which are provided with the identical names and reference numbers. In this embodiment, the current channel determination unit 1801 has a function identical to that of the first mode, but only the method of determining transmission systems is different. The determination of transmission systems is achieved according to the following method. After receiving a request from the event delivery unit 1802 the current channel determination unit 1801 makes a request to the hardware establishment information holding unit 1823 of the library 1701b with respect to tuning information such as frequency specified to the current tuner 1901 and a demodulation method. Subsequently, with reference to the guide shown in figure 20 contained by the library 1701b, the channel identifier corresponding to the tuning information obtained through the request is derived. In addition, with reference to the list of transmission information shown in Figure 21 contained by library 1701b, the corresponding transmission system is derived. Accordingly, it determines the one of the cable transmission system and the terrestrial transmission system to which the MPEG-2 transport stream currently in tune belongs. In this method, the tuning information that is specified to the tuner is the basis for determining the transmission system. With the modality described above, the following effects can be obtained in addition to the effect of being able to change services of several transmission systems of the first modality and reproduce these services. A transmission reception apparatus, which receives and reproduces transmission signals of programs that are executed in parallel by several transmission systems to which the programs belong, determines the transmission system to which the MPEG-2 transport stream belongs. it is tuned, based on the tuning information that is specified to the current tuner, at the time of the key entry. Subsequently, when changing the delivery destinations of the key event entered, the transmission reception device can deliver the key event to the electronic program guide or the program of the transmission system to which it belongs to the MPEG-2 transport stream that is in tuning, even in a state in which guides of electrical programs of the different transmission systems are being executed in parallel.

Third Mode Hereinafter, an apparatus and method of a third embodiment of the present invention is described with reference to the figures. Hardware configuration, software configuration, various types of data formats of this modality are the same as those of the first modality except figure 18. Therefore, figure 1 to figure 17, figure 19 to figure 28 and figure 32 to figure 34 used in the first modality. The constituent elements in these figures have the same functions as the identical constituent elements in the first modality, and therefore their descriptions are not repeated. Figure 29 shows the parts that are closely related to this modality, in the configuration of the program that is considered as necessary for the reproduction of the service in the transmission reception terminal of this modality wherein the cable television transmission system and The transmission system by land waves coexist. In Fig. 29, the constituent elements other than the current channel determining unit 1801 have identical functions as those of the constituent elements in the first mode which are provided with the identical names and reference numbers. In this embodiment, the current channel determination unit 1801 has a function identical to that of the first mode, but only the method of determining the transmission systems is different. The determination of transmission systems is achieved according to the following method. After receiving a request from the event delivery unit 1802, the current channel determination unit 1801 makes a request to a JMF 1704a with respect to the specified PID to the TS 1902 decoder. Subsequently, with reference to the guidance shown in FIG. Figure 20 contained by the library 1701b, derives the channel identifier corresponding to the PID obtained through the request. Further, with reference to the list of transmission information shown in figure 21 contained by library 1701b, it derives using the channel identifier as the key, derives the corresponding transmission system. With this, determines the one of the system of transmission by cable and the system of transmission by terrestrial waves to which a PES package or an MPEG-2 section that is currently being reproduced belongs. In this method, the PID that is specified to the TS decoder is the basis for determining the transmission system. Note that the present invention can be implemented even in the case of making a request to the hardware establishment information retention unit 1823 of library 1701b with respect to the PID currently being specified to the TS 1902 decoder and determining one of the system of cable transmission and the terrestrial transmission system to which a PES package or an MPEG-2 section currently being reproduced belongs. With the modality described above, the following effects can be obtained, in addition to the effect of being able to change services of several transmission systems of the first modality and reproduce these services. A transmission reception apparatus, which receives and reproduces transmission signals of programs that are executed in parallel by several transmission systems to which TV programs belong, can determine the transmission system to which the PES package or the section belongs. MPEG-2 that is currently being decoded at the time of entering the key and delivering the key event to the program guide or program of the transmission system to which the PES packet or MPEG-2 section currently being decoded belongs, including in a state in which the electronic program guides of the plural transmission systems are being executed in parallel.

FOURTH MODE Hereinafter, an apparatus and a method according to a fourth embodiment of the present invention are described with reference to the figures. The hardware configuration, software configuration, various types of data formats of this modality are the same as those of the first modality to the third modality. Therefore, Figure 1 to Figure 17, Figure 19 to Figure 28 and Figure 32 to Figure 34 used in the first embodiment to the third embodiment will be used. The constituent elements in these figures have the same functions as the identical constituent elements in the first embodiment, and therefore their descriptions are omitted. Figures 30 and 31 show respectively the configurations of the programs of this mode, and the programs are stored by software in a ROM 1309. Among the constituent elements shown in these figures are the constituent elements that are not an 1704m event manager and an administrator. Event filter 3004n have the functions identical to the constituent elements in the first mode with the identical names and reference numbers, and therefore the descriptions are not repeated. Figure 30 is a configuration diagram of the program considered necessary for the reproduction of services in the terminal receiving transmissions of this modality in which the cable television transmission system and the terrestrial transmission system coexist; and it is software recorded in ROM 1309. Among these constituent elements of Figure 30, the constituent elements having functions identical to the constituent elements of Figure 17 described in the first embodiment are provided with the reference numbers identical to those of the figure 17, and their descriptions are omitted. The Java library 1704 of program 1700 of figure 30 includes these constituent elements of figure 17 described in the first embodiment, and in addition an event filter manager 3004n. Figure 31 shows the internal configuration of the 1705m event manager of this mode. The event manager 1705m is configured by the current channel determination unit 1801 and the event delivery unit 1802 in a manner similar to that of the first mode.

In this embodiment, the event delivery unit 1802 also has the function of the event delivery unit 1802 described in the first embodiment. In addition to this, it makes a request to the current channel determining unit 1801 with respect to the transmission system I to which the service that is currently being passed as I passes a channel identifier and also the key event. In this mode, after receiving the request from the event delivery unit 1802, the current channel determination unit 1801 determines one of the cable transmission system and the terrestrial transmission system to which the service that is being assigned belongs. currently reproduced, and reports the result to the event delivery unit. The determination of transmission systems by the current channel determination unit 1801 is achieved according to the following methods. After receiving the key event from the event delivery unit 1802 and receiving a request from the event delivery unit 1802, the current channel determination unit 1801 makes a request to the channel identifier retention unit 1824 with respect to to the channel identifier of the service that has been specified and is currently being played. Subsequently, the current channel determination unit 1801 passes the obtained channel identifier to the event filter administrator 3004n described below and asks it with respect to the transmission system to which the service that is currently being reproduced belongs, that is, the transmission system to which the key event must be delivered. The current channel determination unit 1801 considers the result of the request to the 3004n event filter administrator as the transmission system to which the service currently being reproduced belongs., that is, the transmission system to which the key event must be delivered. In the third method, the result of the request to the 3004n event filter administrator is the basis for determining a transmission system. The event filter administrator 3004n receives the channel identifier of the service currently being reproduced from the current channel determination unit 1801 at the time of key entry, and determines the transmission system to which the key entry should be delivered using an event filter. Figure 31 shows the internal configuration of the event filter manager 3004n. The event filter manager 3004n is configured by an event filter invocation unit and an event filter unit 3102.

The event filter register unit 3102 provides a Java API to register event filters. The Java API is represented by the setEventFilter (EventFilterf) format, and an event filter is specified by f. When this API is invoked by the Java program, the specified event filter is stored in the first memory unit 1308. The event filter is a part of the downloaded Java program, and a program code described in the Java language. The event filter is an EventFilter method. filter (Eventevt, Locator I) that has a SystemID as a return value. The SystemlF of the return value is an ID to identify the transmission system that is the delivery destination of the key event. More specifically, for example, it is assumed that SystemID = l shows the cable transmission system, and SystemID = 2 shows the transmission system by ground waves. An evt parameter is the key event, and 1 is the channel identifier. These parameters are communicated from the current channel determination unit 1801 to the event filter invocation unit 3101. The event filter that is the downloaded Java program returns the transmission system to which the entered key event is delivered with reference to the information of those parameters. Note that the return value 0 means that the The event filter does not particularly specify any transmission system to which the key event must be delivered and leaves, to the current channel determination unit 1801, the determination of the transmission system to which the key event must be delivered. In the third case, the current channel determination unit 1801 makes a request to the channel identifier retention unit with respect to the channel identifier of the service that has been specified and is currently being reproduced, in a method similar to the method of the first modality Referring to the list of transmission system information shown in Figure 21, it determines one of the transmission system by cable and the terrestrial transmission system to which the service is currently being reproduced. The event filter invocation unit 3101 receives the past key event from the current channel determination unit 1801 and the channel identifier of the service being reproduced, from the current channel determination unit 1801. Subsequently, it invokes the method filterEvent of the event filter that has been registered in the first memory unit. Then, it notifies the delivery destination of the key event that is the return value of the event filter to the current channel determination unit 1801.

Note that the result of the determination returned by the 3004n event filter administrator is not necessarily the transmission system to which the service currently being reproduced belongs. Even in this case, the current channel determination unit 1801 considers the result of the request of the event filter administrator 3004n as the transmission system to which the key event must be delivered. If an event filter has not been set in the event manager, the current channel determination unit 1801 requests the channel identifier retention unit 1824 with respect to the channel identifier of the service that has been specified and is currently being reproduced, in a method similar to the method of the first modality. Referring to the list of transmission system information shown in Figure 21, it determines one of the transmission system by cable and the terrestrial transmission system to which the service is currently being reproduced. With the modality described above, the following effects will be obtained in addition to the first modality. A transmission reception apparatus, which receives and reproduces transmission signals of programs that are executed in parallel by several transmission systems to which the programs belong, it can determine the transmission system to which the key event must be delivered at the time of key entry, and deliver the key event to the electronic program guide or to the program of the transmission system after the filter registered by the Java program, even in a state in which electronic program guides of the different transmission systems are being executed in parallel. A particular effect is that the Java program can forcefully change the key delivery destinations regardless of the service currently being played and the MPEG-2 transport stream that is tuned. In the modality described above, variations that maintain the above effects are conceivable. It has been described that the current channel determining unit 1801 makes a request to the channel identifier retention unit with respect to the channel identifier of the service being played, the key event passes and the second channel identifier obtained to the channel identifier. event filter invocation unit 3101 in order to obtain the determination result. However, a method for making a request by passing other parameters to the event filter invocation unit 3101 can be used as long as the information is sufficient to determine the transmission system that is the delivery destination. The present invention can be implemented using another method in which a current channel determination unit 1801 obtains the determination result not when making a request to the channel identifier retention unit with respect to the channel identifier of the service being reproduced. currently, but passing only the key event to the 3101 event filter invocation unit and the event filter has an EventFilter method. filter (Eventevt) that has the delivery destination of the key event as the return value. In addition, if the return value is 0, the system can be configured to determine one of the cable transmission system and the terrestrial transmission system to which the service currently belongs is currently being reproduced, in a method similar to that of the transmission system. method of the second modality or the method of the third modality. The different modalities described up to this point show examples of implementation of the present invention, and other implementation examples can be implemented as long as the essence of the present invention is achieved. It has been described in the above embodiments that the current channel determination unit 1801 determines the transmission system to which the service currently being reproduced belongs as the key entry time and the event delivery unit changes the delivery destinations of the key event entered. However, it should be noted that the present invention is applicable even in that delivery destinations that are determined by the current channel determination unit 1801 as change targets and which are changed by the event delivery unit 1802 are destinations of arbitrary events and arbitrary resource allocation destinations, not just the delivery destinations of the key event. In the modalities described above, the current channel determination unit determines whether the service currently being reproduced is the cable transmission service or the terrestrial transmission service, independently of the operation of the identifier unit channel. However, the system can be configured in such a way that the current channel determination unit uses, instead, the determination result of the channel identifier determination unit. In other words, the determination result of the channel identifier determination unit is temporarily saved, and the current channel determination unit reads this and considers it as the result of the determination. These embodiments show the configurations for transmission systems, but the present invention is independent of the types of transmission systems. For example, the present invention can be easily applied to a satellite system, a landwave system, a TV program delivery system using an IP network or the like. Furthermore, the present invention is not directly related to differences between the respective transmission systems, it is applicable to any arbitrary transmission medium notwithstanding the transmission system. The present invention is also applicable, however, whether the system is wired or a wireless system. It is not necessary for the AV decoder to decode video and audio at the same time. The present invention can be implemented even if the AV decoder is configured as separate video and audio decoders. In addition, the AV decoder may have a decoding function for data such as captioning and the like. In the embodiments, an example is provided in which an adapter controlling a conditional access system has been introduced, but the adapter is not always necessary for the implementation of the present invention. The adapter can have any format, and a configuration without the adapter is also possible. In such a case, in Fig. 15, the MPEG-2 transport stream of the tuner is input directly into the TS decoder. The present invention is applicable in such a case as well. In addition, the conditional access release by the adapter does not necessarily have to be carried out before the TS decoder. A configuration in which the adapter is in an arbitrary position and used to release the conditional access system is easily implementable, and the present invention is applicable in such a case as well. The visual presenter and loudspeaker may be contained within the transmission reception apparatus, or a visual presenter and external loudspeaker may be connected to the transmission reception apparatus. The present invention is applicable notwithstanding the location and number of the visual presenter and loudspeaker. The present invention is implementable even if the CPU itself is a system that carries out the processes of one or all of TS decoding and AV decoding. Some of the Java virtual machines translate the byte codes into an executable form that can be interpreted by the CPU, and pass the result to the CPU, which executes it; the present invention is applicable in such a case as well. It has been described in these modalities that a program downloaded from a transport stream is executed. However, methods such as the start of a program pre-recorded in a ROM, start of a downloaded program and stored in the second memory unit are conceivable. The DSMCC file system and the AIT file recording format can be arbitrary. The present invention can be implemented even in the case of combining a filtering method and obtaining AIT sections of an MPEG-2 transport stream with a method of recording the DSMCC sections in a file in a single format. Furthermore, the present invention can be implemented even in the case of combining a method of filtering and obtaining DSMCC sections of the MPEG-2 transport stream with a method of recording the AIT section in a file in a single format. It is assumed in those described embodiments that the terminal devices receive transmission signals from both the cable transmission system and the terrestrial transmission system, and that these transmission signals from both the cable transmission system and the wave transmission system Terrestrial data can be received and reproduced by a single common hardware configuration. However, the terminal apparatus can prepare two separate hardware configurations of the configuration for the cable transmission system and the hardware configuration for the terrestrial transmission system. Although only some exemplary embodiments of this invention have been described in detail above, those skilled in the art will readily appreciate that many modifications to exemplary embodiments are possible without departing materially from the novel teachings and advantages of this invention. Accordingly, all of these modifications are intended to be included within the scope of this invention.

INDUSTRIAL APPLICABILITY A transmission reception apparatus of the present invention is highly likely to be used in the consumer apparatus industry as it relates to transmission reception apparatus. For example, the present invention is applicable to a cable STB, a digital TV and the like. Moreover, the present invention is also applicable in devices with a function of receiving transmissions, for example, a cell phone and the like. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (11)

1. CLAIMS I Having described the invention as above, the content of the following claims is claimed as property: 1. A transmission content reproduction apparatus that receives and reproduces respective transmission contents that comply with a plurality of transmission specifications that are different from one another. others, characterized in that it comprises: a receiving unit that functions to receive the transmission contents each of which complies with one of the plurality of transmission specifications that are different from each other; a plurality of reproduction environments each of which is a customized program, and each of which is used to reproduce transmission contents that meet one of the plurality of transmission specifications that are different from each other, and all which are activated concurrently; a storage unit that functions to store identification information to identify transmission specifications that correspond to each of the transmission contents received by the receiving unit; a first reproduction environment identification unit that functions to identify a customized program, which is used to reproduce transmission contents that are currently being reproduced, among the plurality of personalized programs concurrently activated by referring to the identification information stored in the storage unit and a supply or delivery unit that functions to deliver key entry information to a program, which is currently running in the customized program identified by the first reproduction environment identification unit, only through the program custom identified by the first unit of identification of reproduction environments.
2. 2. The transmission content reproduction apparatus according to claim 1, characterized in that it further comprises: a selection unit that functions to select a transmission content that will be reproduced between the transmission contents that meet the plurality of transmission specifications. transmission; a second reproduction environment identification unit that functions to identify a customized program, which is capable of reproducing the transmission content selected by the selection unit, from among the plurality of personalized programs, and a reproduction environment establishment unit that functions to cause the customized program, identified by the second reproduction environment identification unit, to execute the program included in the transmission content selected by the selection unit.
3. 3. The transmission content reproduction apparatus according to claim 2, characterized in that the second reproduction environment identification unit functions to identify, when referring to a table which is the identification information stored in the storage unit and which respectively associates the plurality of transmission specifications with a plurality of content identifiers to identify the respective transmission contents, a personalized program, between the personalized programs, which is associated with a content identifier, among the content identifiers, for identify the transmission content selected by the selection unit.
4. 4. The transmission content reproduction apparatus according to claim 1, characterized in that it further comprises: a obtaining unit that functions to obtain a piece of tuning information indicating a frequency that is currently being applied to the reproduction of a transmission content, where the first unit of identification of reproduction environments works to identify, referring to a table which is the identification information stored in the storage unit and which respectively associates the plurality of transmission specifications with pieces of tuning information indicating respectively frequencies, a personalized program, among the customized programs that meet with transmission specifications, which is associated with the piece of tuning information obtained by the obtaining unit.
5. The transmission content reproduction apparatus according to claim 1, characterized in that it further comprises: a obtaining unit operating to obtain a piece of decoding information indicating a package identifier that is currently being applied to the reproduction of a transmission content, wherein the first reproduction environment identification unit functions to identify, when referring to a table which is the identification information stored in the storage unit and which respectively associates the plurality of transmission specifications with decoding information pieces that respectively indicate packet identifiers, a customized program, between the custom programs that meet transmission specifications, that is associated with the piece of decoding information obtained by the obtaining unit.
6. The transmission content reproduction apparatus according to claim 1, characterized in that it further comprises: a obtaining unit that functions to obtain a content identifier to identify a transmission content that is currently being reproduced, wherein the first The reproduction environments identification unit functions to identify, when referring to a table which is the identification information stored in the storage unit and which respectively associates the plurality of transmission specifications with a plurality of content identifiers that respectively identify the Transmission contents, a personalized program, between the personalized programs that comply with transmission specifications, which is associated with the content identifier obtained by the obtaining unit.
7. The transmission content reproduction apparatus according to claim 1, characterized in that it further comprises: a delivery destination identification unit that functions to identify a customized program to which the key entry information between the programs is supplied. customized, based on an execution result of a downloaded program, where the delivery unit works to deliver the key entry information to the program that is currently being executed, only through the customized program identified by the identification unit of the program. delivery destination.
8. 8. A transmission content reproduction apparatus that receives and reproduces respective transmission contents that comply with a plurality of transmission specifications that are different from each other, characterized in that it comprises: a receiving unit that functions to receive the transmission contents each of which complies with one of the plurality of transmission specifications that are different from each other; a plurality of reproduction environments each of which is a customized program, and each of which is used to reproduce transmission contents that meet one of the plurality of transmission specifications that are different from each other, and all which are activated concurrently; a storage unit that functions to store identification information to identify transmission specifications that correspond to each of the transmission contents received by the receiving unit; a selection unit that functions to select a transmission content that will be reproduced among the transmission contents that meet the plurality of transmission specifications; an identification unit of reproduction environments that functions to identify, among the plurality of reproduction environments activated concurrently, a reproduction environment that is capable of reproducing the transmission content selected by the selection unit and a unit of establishment of environments of reproduction that works to cause the customized program, identified by the reproduction environment identification unit, to reproduce the transmission content selected by the selection unit.
9. 9. A method of reproducing transmission content to receive and play respective transmission contents that comply with a plurality of transmission specifications that are different from each other, characterized in that it comprises: a reception stage for receiving the contents of transmission each of which complies with one of the plurality of transmission specifications that are different from each other; an activation step to activate all of a plurality of playback environments concurrently, each of which is a customized program, in order to use each of the customized programs to reproduce the transmission contents that comply with one of the plurality of transmission specifications that are different from each other; a storage step for storing identification information to identify a transmission specification corresponding to each of the transmission contents received by the receiving unit; a step of identifying reproduction environments to identify, when referring to identification information stored in the storage unit, a personalized program, which is used to reproduce the transmission contents that are currently being reproduced, among the plurality of personalized programs activated concurrently and a stage of supply or delivery to supply or deliver key entry information to a program, which is currently running in the customized program identified in the identification stage of reproduction environments, only through the reproduction environment identified in the stage of identification of reproduction environments.
10. 10. A program designed to receive and reproduce contents of respective reception and reproduction that comply with a plurality of transmission specifications that are different from each other, characterized in that it causes a computer to execute: a reception stage to receive the transmission contents each of which complies with one of the plurality of transmission specifications that are different from each other; an activation step to activate all of a plurality of playback environments concurrently, each of which is a customized program, in order to use each of the customized programs to reproduce the transmission contents that comply with one of the plurality of transmission specifications that are different from each other; a storage step for storing identification information to identify a transmission specification corresponding to each of the transmission contents received by the receiving unit; a step of identifying reproduction environments to identify, when referring to identification information stored in the storage unit, a personalized program, which is used to reproduce the transmission contents that are currently being reproduced, among the plurality of personalized programs activated concurrently and a stage of supply or delivery to supply or deliver key entry information to a program, which is currently running in the customized program identified in the stage of identification of reproduction environments, only through the personalized program identified in the stage of identification of reproduction environments. The transmission content reproduction apparatus according to claim 1, characterized in that a program, which is currently being executed in the custom program, is included in the transmission content.