JP5866636B2 - Stream acquisition device, playback processing device, program processing system, stream processing method, and stream processing program - Google Patents

Description

  The present invention relates to a stream acquisition device, a playback processing device, a program processing system, a stream processing method, and a stream processing program, and in particular, a stream acquisition device, a playback processing device, a program processing system, and a stream processing method for processing a received program. And a stream processing program.

  In the Digital Transmission Content Protection Specification Volume 1 (Non-Patent Document 1) (hereinafter referred to as DTCP), the following provisions are defined in order to protect content during digital transfer from unauthorized copying or alteration. In other words, copy control information (Copy Control Information, CCI), mutual authentication and key exchange (Authentication and Key Exchange, AKE) by public key cryptography, content encryption (Content Encryption), and elimination of unauthorized devices (System Renewability) Thus, the content during digital transfer is protected.

  Also, DTCP Volume 1 Supplement E (Non-Patent Document 2) (hereinafter referred to as DTCP-IP) is used to transmit / receive content between devices compatible with DTCP (Digital Transmission Content Protection) via an IP (Internet Protocol) network. Necessary provisions are established. That is, mutual authentication and key exchange (AKE) are performed in the source device (Source) that is the content transmission side and the sink device (Sink) that is the content reception side. When the AKE is completed, the source device adds the CCI to the content, encrypts it using the public key received by the AKE, and transmits it to the sink device. The sink device decrypts the received content using a secret key that is a pair of public keys sent to the source device by AKE. Accordingly, a DMS (Digital Media Server) that receives, for example, a television broadcast between apparatuses connected by a home LAN (Local Area Network) and distributes the live content and a DMP (Digital Media) that reproduces the distributed live content. By transmitting and receiving content between the players, distribution of live content in the home is realized.

Digital Transmission Content Protection Specification Volume 1 (Informational Version) Rev. 1.6 2010.3 DTCP Volume 1 Supplement E Mapping DTCP to IP (Informational Version) Rev. 1.31 2010.9

  According to the rules defined in Non-Patent Document 1 and Non-Patent Document 2, when content is transmitted and received between devices, mutual authentication and key exchange processing must be performed between the devices. However, this mutual authentication and key exchange processing takes time and is performed each time the DMS reception channel is changed. Also, the process of changing the channel received by the DMS takes time. Therefore, the standby time from when the user receives a change operation of the DMS reception channel until the live content can be viewed increases.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a stream acquisition device and a reproduction processing device capable of reducing the time required for selecting a program in a configuration for processing a received program. , A program processing system, a stream processing method, and a stream processing program.

  (1) In order to solve the above problem, a stream acquisition apparatus according to an aspect of the present invention is a stream acquisition apparatus for receiving and processing a stream obtained by dividing information of one or a plurality of programs into a plurality of packets. A selection program receiving unit for performing authentication processing by transmitting and receiving authentication information between the communication unit and the playback processing device; and for receiving the stream selectively after completion of the authentication processing. The tuning unit receives the stream corresponding to the program specified by the program selection instruction received from the reproduction processing device, and the communication unit reproduces the information indicating the content of the stream received by the tuning unit. A control unit for transmitting to the processing device, wherein the selected program receiving unit is configured to reproduce the authentication information including selected program information indicating a program to be selected. When the selected program information is received from the reproduction processing device before being received from the device or before the authentication processing is performed, the selected program information is output to the control unit, and the control unit receives the selected program reception unit. When the selected program information is received from, the tuning unit is caused to receive the stream corresponding to the program indicated by the selected program information regardless of whether or not the authentication process is completed.

  With such a configuration, the stream acquisition apparatus can receive selected program information indicating a program to be selected during the authentication process or before the authentication process is performed. Therefore, the tuning process and the authentication process in the tuning unit are performed in parallel. It can be carried out. As a result, the time required to execute the tuning process and the authentication process is shortened as compared with the case where the tuning process is performed after receiving the program selection instruction after the authentication process is completed, that is, the serial process is performed. be able to. That is, the stream acquisition device performs the tuning process and the authentication process in parallel, thereby shortening the time until the tuning process and the authentication process are completed, and designates the program selection instruction after receiving the program selection instruction from the reproduction processing apparatus. It is possible to shorten the time until the stream corresponding to the programmed program is transmitted to the reproduction processing apparatus.

  (2) Preferably, the stream acquisition device and the reproduction processing device transmit and receive information using IP packets, and the stream acquisition device further includes information indicating a correspondence relationship between a port number of the IP packet and a program. A storage unit for storing, wherein the selected program receiving unit receives a port number of an IP packet including the authentication information as the selected program information from the reproduction processing device, and the received port number is the control unit When the control unit receives the port number from the selected program receiving unit, the control unit transmits the stream corresponding to the port number based on the information indicating the correspondence acquired from the storage unit. To receive.

  With such a configuration, the program requested by the reproduction processing apparatus can be specified from the port number of the IP packet including the authentication information. Thereby, the stream acquisition apparatus can specify the program requested by the reproduction processing apparatus without using the unique communication that requires the specification to be determined in advance with the reproduction processing apparatus. That is, the stream acquisition device can specify the program requested by the reproduction processing device only by following the framework of the existing specification.

  (3) Preferably, the stream acquisition device further includes a transcode processing unit for converting a packet of the stream received by the tuning unit into a packet that can be processed by the reproduction processing device, and the control The unit causes the communication unit to transmit the packet converted by the transcode processing unit to the reproduction processing device, and the selected program reception unit includes the selected program including information used for the conversion in the transcode processing unit. Information is received from the playback processor.

  With this configuration, the stream acquisition apparatus can receive the information necessary for the conversion included in the selected program information during the authentication process or before the authentication process is performed. The packet conversion process and the authentication process in the processing unit can be performed in parallel. As a result, the time required to execute the authentication process, the tuning process, and the packet conversion process is obtained, and the tuning process and the packet conversion process are performed after receiving the program selection instruction after the authentication process is completed. Compared with the case where processing is performed, it can be shortened. That is, the stream acquisition device performs the tuning process, the packet conversion process, and the authentication process in parallel, thereby shortening the time until the authentication process, the tuning process, and the packet conversion process are completed. The time from receiving the program selection instruction to transmitting the stream corresponding to the program designated by the program selection instruction to the reproduction processing apparatus can be shortened.

  (4) Preferably, the stream acquisition device further includes an encryption processing unit for encrypting the packet of the stream received by the tuning unit into a packet decodable in the reproduction processing device, and the control The unit causes the communication unit to transmit the packet encrypted by the encryption processing unit to the reproduction processing device, and the selected program receiving unit transmits information used for the encryption from the reproduction processing device in the authentication process. Receive.

  In this way, the stream acquisition device transmits the encrypted packet to the reproduction processing device using information for encrypting the packet that can be decrypted by the reproduction processing device received from the reproduction processing device. As a result, only the reproduction processing apparatus can decrypt the encrypted packet. That is, the packet transmitted to the reproduction processing apparatus is protected from unauthorized copying or tampering during transfer.

  (5) Preferably, the stream acquisition apparatus further includes the stream corresponding to the program indicated by the selected program information received by the tuning unit until the authentication process is completed before the authentication process is completed. Is provided with a packet deletion unit for discarding information indicating the contents of the stream without transmitting it to the reproduction processing apparatus.

  With such a configuration, it is possible to shorten the delay time required until the stream received by the tuning unit is transmitted to the reproduction processing apparatus. That is, the tuning process and the authentication process can be performed in parallel. For example, when the tuning process is completed earlier than the authentication process, the following problem occurs. Since the stream acquisition apparatus cannot receive the program selection instruction from the reproduction processing apparatus until the authentication process is completed, the stream acquisition apparatus cannot promptly transmit the stream packet received by the tuning unit to the reproduction processing apparatus. If the stream acquisition device transmits a packet that could not be promptly transmitted to the reproduction processing device to the reproduction processing device after receiving the program selection instruction from the reproduction processing device after completion of the authentication processing, the delay time becomes long. On the other hand, the packet deletion unit 41 can shorten the delay time by discarding the packet received by the tuning unit until the authentication process is completed.

  (6) More preferably, the encryption processing unit converts the packet of the stream received by the tuning unit into a packet that can be decrypted by the reproduction processing device in accordance with DTCP-IP (Digital Transmission Content Protection-Internet Protocol). Encrypt.

  With such a configuration, the stream acquisition device satisfies the DTCP-IP specification, and thus can transmit an encrypted packet to a reproduction processing device that satisfies the specification. In addition, the stream acquisition device can be sold in a country or region that requires the specification to be satisfied.

  (7) Preferably, the selected program receiving unit performs the authentication process with the reproduction processing device in accordance with DTCP-IP.

  With such a configuration, the stream acquisition device satisfies the DTCP-IP specification, and thus can be connected to a stream acquisition device or a reproduction processing device that satisfies the specification. In addition, the stream acquisition device can be sold in a country or region that requires the specification to be satisfied.

  (8) A reproduction processing apparatus according to another aspect of the present invention receives a stream obtained by dividing information of one or more programs into a plurality of packets from a stream acquisition apparatus, and reproduces the program based on the stream. A selection processing unit for performing authentication processing by transmitting / receiving authentication information to / from the stream acquisition device, and a control unit for controlling the selection program specifying unit The control unit causes the selected program designating unit to include the selected program information indicating the stream to be selectively received by the stream acquisition device in the authentication information, and transmit the selected program information to the stream acquisition device. Alternatively, before the authentication process is performed, the selected program information is transmitted to the stream acquisition device, and when the authentication process is completed, the control unit Stream acquisition apparatus transmits a program selection instruction indicating the stream to be transmitted to the self to the stream obtaining device.

  With such a configuration, the reproduction processing apparatus can transmit selected program information indicating a program to be selected during the authentication process or before the authentication process is performed. Therefore, in the stream acquisition apparatus, the tuning process and the authentication process are performed in parallel. It can be carried out. As a result, it is possible to shorten the time required for completing the tuning process and the authentication process in the stream acquisition apparatus. Therefore, the reproduction processing apparatus transmits the selected program information included in the authentication information, or transmits the selected program information before the authentication process is performed, thereby completing the authentication process for the stream indicated by the program selection instruction. It can be received from the stream acquisition apparatus earlier than when the tuning process is performed after receiving the program selection instruction transmitted later.

  (9) Preferably, the stream acquisition device and the reproduction processing device transmit and receive information using IP packets, and the reproduction processing device further includes information indicating a correspondence relationship between the port number of the IP packet and a program. And the control unit specifies a port number corresponding to the program to be reproduced based on the information indicating the correspondence acquired from the storage unit, and selects the selected program The designation unit causes the specified port number to be included in the authentication information as the selected program information and transmitted to the stream acquisition device.

  With such a configuration, a program to be reproduced can be associated with the port number of the IP packet including the authentication information and transmitted to the stream acquisition device. As a result, the playback processing apparatus transmits authentication information including information on the program to be played back to the stream acquisition apparatus without using unique communication that requires specification to be determined in advance with the stream acquisition apparatus. be able to. That is, the reproduction processing apparatus can transmit authentication information including information on a program to be reproduced to the stream acquisition apparatus only in accordance with the existing specification framework.

  (10) Preferably, the control unit sends information for converting the packet of the stream received by the stream acquisition device into a packet that can be processed by the reproduction processing device. It is included in the selected program information and transmitted to the stream acquisition device.

  With such a configuration, the playback processing apparatus can transmit the information necessary for the conversion included in the selected program information during the authentication process or before the authentication process is performed. Packet conversion processing and authentication processing can be performed in parallel. As a result, the time required to execute the authentication process, the tuning process, and the packet conversion process is obtained, and the tuning process and the packet conversion process are performed after receiving the program selection instruction after the authentication process is completed. Compared with the case where processing is performed, it can be shortened. In other words, the playback processing device shortens the time until the authentication processing, tuning processing, and packet conversion processing are completed by causing the stream acquisition device to perform tuning processing, packet conversion processing, and authentication processing in parallel. In addition, it is possible to shorten the time from when the program selection instruction is transmitted to the stream acquisition apparatus until the stream corresponding to the program specified by the program selection instruction is received from the stream acquisition apparatus.

  (11) Preferably, the control unit transmits information for encrypting the packet of the stream received by the stream acquisition device into a packet that can be decrypted by the playback processing device. In the authentication process, it is transmitted to the stream acquisition device.

  With such a configuration, the reproduction processing apparatus can receive the packet encrypted in the stream acquisition apparatus by the information for encrypting the packet into a packet decodable in its own reproduction processing apparatus. As a result, only the reproduction processing apparatus can decrypt the encrypted packet. That is, the reproduction processing apparatus can receive a packet protected from unauthorized copying or falsification during transfer from the stream acquisition apparatus.

  (12) Preferably, the selected program designating unit performs the authentication process with the stream acquisition device in accordance with DTCP-IP.

  With such a configuration, the playback processing device satisfies the DTCP-IP specification, and thus can be connected to a stream acquisition device or a playback processing device that satisfies the specification. In addition, the reproduction processing apparatus can be sold in a country or region that requires the specification to be satisfied.

  (13) A program processing system according to an aspect of the present invention is a program processing system for processing a stream obtained by dividing information of one or a plurality of programs into a plurality of packets, and for acquiring the stream. A stream acquisition device and a playback processing device for performing program playback processing based on the stream acquired by the stream acquisition device, the stream acquisition device and the playback processing device comprising: the stream acquisition device; Before transmitting / receiving information indicating the contents of the stream between the playback processing devices, authentication processing is performed to transmit / receive authentication information, and the stream acquisition device receives from the playback processing device after completion of the authentication processing. The tuning unit for selectively receiving a stream is controlled based on the selected program selection instruction. Thus, information indicating the contents of the stream corresponding to the program designated by the program selection instruction is transmitted to the reproduction processing device, and the reproduction processing device transmits the selected program information indicating the program to be selected to the authentication information. Or the selected program information is transmitted to the stream acquisition device before the authentication process is performed. When the stream acquisition device receives the selected program information, the authentication is performed. Regardless of whether the processing is completed, the tuning unit is caused to receive the stream corresponding to the program indicated by the selected program information.

  With this configuration, the stream acquisition apparatus can receive selected program information indicating a program to be selected from the reproduction processing apparatus during the authentication process or before the authentication process is performed. Processing can be performed in parallel. As a result, the time required to execute the tuning process and the authentication process is shortened as compared with the case where the tuning process is performed after receiving the program selection instruction after the authentication process is completed, that is, the serial process is performed. be able to. That is, the stream acquisition device performs the tuning process and the authentication process in parallel, thereby shortening the time until the tuning process and the authentication process are completed, and designates the program selection instruction after receiving the program selection instruction from the reproduction processing apparatus. It is possible to shorten the time until the stream corresponding to the programmed program is transmitted to the reproduction processing apparatus.

  (14) Preferably, the stream acquisition device and the reproduction processing device transmit and receive information using IP packets, and the stream acquisition device receives information indicating a correspondence relationship between a port number of the IP packet and the program. The reproduction processing device stores the port number as the selected program information in the authentication information and transmits it to the stream acquisition device.

  With such a configuration, the playback processing apparatus can associate the program to be played back with the port number of the IP packet including the authentication information and transmit it to the stream acquisition apparatus. Further, the stream acquisition device can specify the program requested by the reproduction processing device from the port number of the IP packet including the authentication information. As a result, the stream acquisition device and the playback processing device can transmit / receive the selected program information without using unique communication whose specifications need to be determined in advance. In other words, the stream acquisition device and the playback processing device can transmit and receive selected program information only in accordance with the existing specification framework.

  (15) Preferably, the stream acquisition device converts the packet of the stream received by the tuning unit into a packet that can be processed by the playback processing device, and transmits the packet to the playback processing device. Further, the information used for the conversion is included in the selected program information and transmitted to the stream acquisition device.

  With this configuration, the stream acquisition apparatus can receive the information necessary for the conversion included in the selected program information during the authentication process or before the authentication process is performed. The conversion process and the authentication process can be performed in parallel. As a result, the time required to execute the authentication process, the tuning process, and the packet conversion process is the same as the case where the tuning process is performed after the program selection instruction is received after the authentication process is completed, that is, the serial process is performed. Compared to this, it can be shortened. That is, the stream acquisition device performs the tuning process, the packet conversion process, and the authentication process in parallel, thereby shortening the time until the authentication process, the tuning process, and the packet conversion process are completed. The time from receiving the program selection instruction to transmitting the stream corresponding to the program designated by the program selection instruction to the reproduction processing apparatus can be shortened.

  (16) Preferably, the stream acquisition device encrypts the packet of the stream received by the tuning unit into a packet that can be decrypted by the reproduction processing device, and transmits the packet to the reproduction processing device. Further transmits information used for the encryption to the stream acquisition apparatus in the authentication process.

  In this way, the stream acquisition device transmits the encrypted packet to the reproduction processing device using information for encrypting the packet that can be decrypted by the reproduction processing device received from the reproduction processing device. As a result, only the reproduction processing apparatus can decrypt the encrypted packet. That is, a packet transmitted from the stream acquisition device to the reproduction processing device is protected from unauthorized copying or alteration during transfer.

  (17) Preferably, for the stream corresponding to the program indicated by the selected program information received by the tuning unit until the authentication processing is completed, the stream acquisition device is information indicating the content of the stream. Is discarded without being transmitted to the reproduction processing apparatus.

  With such a configuration, it is possible to shorten the delay time required until the stream received by the tuning unit is transmitted to the reproduction processing apparatus. That is, the tuning process and the authentication process can be performed in parallel. For example, when the tuning process is completed earlier than the authentication process, the following problem occurs. Since the stream acquisition apparatus cannot receive the program selection instruction from the reproduction processing apparatus until the authentication process is completed, the stream acquisition apparatus cannot promptly transmit the stream packet received by the tuning unit to the reproduction processing apparatus. If the stream acquisition device transmits a packet that could not be promptly transmitted to the reproduction processing device to the reproduction processing device after receiving the program selection instruction from the reproduction processing device after completion of the authentication processing, the delay time becomes long. On the other hand, the delay time can be shortened by discarding the packet received by the tuning unit until the authentication processing is completed.

  (18) Preferably, the stream acquisition device and the playback processing device perform the authentication processing according to DTCP-IP.

  With such a configuration, the stream acquisition device and the reproduction processing device satisfy the DTCP-IP specification, and thus can be connected to the stream acquisition device or the reproduction processing device that satisfies the specification. In addition, a stream acquisition device and a playback processing device can be sold in a country or region that requires the specification to be satisfied.

  (19) A stream acquisition method according to an aspect of the present invention is a stream acquisition method in a stream acquisition device for receiving and processing a stream obtained by dividing information of one or more programs into a plurality of packets. A step of performing authentication processing by transmitting / receiving authentication information to / from the playback processing device, and after completion of the authentication processing, the stream corresponding to the program specified by the program selection instruction received from the playback processing device. Receiving the authentication information including the selected program information indicating the program to be selected from the reproduction processing device, receiving the information indicating the content of the received stream to the reproduction processing device, or If the selected program information is received from the playback processing apparatus before the authentication process is performed, the authentication process is completed. Regardless of whether the, and receiving the stream corresponding to the program indicated by the selected program information.

  With such a configuration, the stream acquisition apparatus can receive selected program information indicating a program to be selected during the authentication process or before the authentication process is performed. Therefore, the tuning process and the authentication process in the tuning unit are performed in parallel. It can be carried out. As a result, the time required to execute the tuning process and the authentication process is shortened as compared with the case where the tuning process is performed after receiving the program selection instruction after the authentication process is completed, that is, the serial process is performed. be able to. That is, the stream acquisition device performs the tuning process and the authentication process in parallel, thereby shortening the time until the tuning process and the authentication process are completed, and designates the program selection instruction after receiving the program selection instruction from the reproduction processing apparatus. It is possible to shorten the time until the stream corresponding to the programmed program is transmitted to the reproduction processing apparatus.

  (20) According to another aspect of the present invention, a reproduction processing method receives a stream obtained by dividing information of one or more programs into a plurality of packets from a stream acquisition device, and reproduces the program based on the stream. A playback processing method in a playback processing device for performing authentication processing by transmitting / receiving authentication information to / from the stream acquisition device, and the stream to be selectively received by the stream acquisition device And transmitting the selected program information included in the authentication information to the stream acquisition device or transmitting the selected program information to the stream acquisition device before the authentication processing is performed. When completed, the stream acquisition device sends a program selection instruction indicating the stream to be transmitted to itself. And transmitting to the over-time acquisition device.

  With such a configuration, the reproduction processing apparatus can transmit selected program information indicating a program to be selected during the authentication process or before the authentication process is performed. Therefore, in the stream acquisition apparatus, the tuning process and the authentication process are performed in parallel. It can be carried out. As a result, it is possible to shorten the time required for completing the tuning process and the authentication process in the stream acquisition apparatus. Therefore, the reproduction processing apparatus transmits the selected program information included in the authentication information, or transmits the selected program information before the authentication process is performed, thereby completing the authentication process for the stream indicated by the program selection instruction. It can be received from the stream acquisition device earlier than when tuning processing is performed after receiving a program selection instruction to be transmitted later.

  (21) A program processing method according to an aspect of the present invention is a program processing method in a program processing system for processing a stream obtained by dividing information of one or a plurality of programs into a plurality of packets. Before the apparatus and the reproduction processing apparatus transmit / receive authentication information to / from the stream acquisition apparatus and the reproduction processing apparatus before transmitting / receiving information indicating the contents of the stream, After completion of the authentication process, the tuning unit for selectively receiving a stream is controlled based on the program selection instruction received from the reproduction processing apparatus, thereby supporting the program specified by the program selection instruction. Transmitting information indicating the contents of the stream to the reproduction processing device, and the reproduction processing device. Transmitting the selected program information indicating the program to be selected to the stream acquisition device included in the authentication information, or transmitting the selected program information to the stream acquisition device before the authentication processing is performed; When the stream acquisition device receives the selected program information, the tuning unit receives the stream corresponding to the program indicated by the selected program information regardless of whether or not the authentication process is completed. Including.

  With this configuration, the stream acquisition apparatus can receive selected program information indicating a program to be selected from the reproduction processing apparatus during the authentication process or before the authentication process is performed. Processing can be performed in parallel. As a result, the time required to execute the tuning process and the authentication process is shortened as compared with the case where the tuning process is performed after receiving the program selection instruction after the authentication process is completed, that is, the serial process is performed. be able to. That is, the stream acquisition device performs the tuning process and the authentication process in parallel, thereby shortening the time until the tuning process and the authentication process are completed, and designates the program selection instruction after receiving the program selection instruction from the reproduction processing apparatus. It is possible to shorten the time until the stream corresponding to the programmed program is transmitted to the reproduction processing apparatus.

  (22) A stream acquisition program according to an aspect of the present invention is a stream acquisition program used in a stream acquisition apparatus for receiving and processing a stream obtained by dividing information of one or more programs into a plurality of packets. A step of performing authentication processing by transmitting / receiving authentication information to / from a reproduction processing device to a computer, and after the completion of the authentication processing, the reproduction unit is configured to selectively receive the stream. A step of receiving the stream corresponding to the program specified by the program selection instruction received from the processing device, a step of transmitting information indicating the content of the received stream to the reproduction processing device, and a program to be selected The authentication information including the selected program information is received from the reproduction processing device or the authentication information is received. Receiving the stream corresponding to the program indicated by the selected program information regardless of whether or not the authentication process is completed when the selected program information is received from the reproduction processing device before the process is performed; This is a program to be executed.

  With such a configuration, the stream acquisition apparatus can receive selected program information indicating a program to be selected during the authentication process or before the authentication process is performed. Therefore, the tuning process and the authentication process in the tuning unit are performed in parallel. It can be carried out. As a result, the time required to execute the tuning process and the authentication process is shortened as compared with the case where the tuning process is performed after receiving the program selection instruction after the authentication process is completed, that is, the serial process is performed. be able to. That is, the stream acquisition device performs the tuning process and the authentication process in parallel, thereby shortening the time until the tuning process and the authentication process are completed, and designates the program selection instruction after receiving the program selection instruction from the reproduction processing apparatus. It is possible to shorten the time until the stream corresponding to the programmed program is transmitted to the reproduction processing apparatus.

  (23) A reproduction processing program according to another aspect of the present invention receives a stream obtained by dividing information of one or more programs into a plurality of packets from a stream acquisition device, and reproduces the program based on the stream. A reproduction processing program for use in a reproduction processing device for performing authentication processing by transmitting and receiving authentication information to and from the stream acquisition device to a computer, and the stream acquisition device selectively Transmitting the selected program information indicating the stream to be received, included in the authentication information, to the stream acquisition device, or transmitting the selected program information to the stream acquisition device before the authentication processing is performed; When the authentication process is completed, the stream acquisition device should transmit the message to the self. Program selection instruction indicating streams, a program for executing a step of transmitting to said stream acquisition device.

  With such a configuration, the reproduction processing apparatus can transmit selected program information indicating a program to be selected during the authentication process or before the authentication process is performed. Therefore, in the stream acquisition apparatus, the tuning process and the authentication process are performed in parallel. It can be carried out. As a result, it is possible to shorten the time required for completing the tuning process and the authentication process in the stream acquisition apparatus. Therefore, the reproduction processing apparatus transmits the selected program information included in the authentication information, or transmits the selected program information before the authentication process is performed, thereby completing the authentication process for the stream indicated by the program selection instruction. It can be received from the stream acquisition device earlier than when tuning processing is performed after receiving a program selection instruction to be transmitted later.

  (24) A program processing program according to an aspect of the present invention is a program processing program used in a program processing system for processing a stream obtained by dividing information of one or a plurality of programs into a plurality of packets, A step of performing authentication processing by transmitting / receiving authentication information to / from the computer before the stream acquisition device and the playback processing device transmit / receive information indicating the contents of the stream between the stream acquisition device and the playback processing device; Designated by the program selection instruction by controlling the tuning unit for selectively receiving the stream based on the program selection instruction received from the reproduction processing apparatus after the authentication processing is completed Information indicating the content of the stream corresponding to the program that has been And the reproduction processing device includes the selected program information indicating the program to be selected in the authentication information and transmits it to the stream acquisition device, or the selected program information before the authentication processing is performed. To the stream acquisition device, and when the stream acquisition device receives the selected program information, regardless of whether the authentication process is completed or not, the tuning unit adds the program indicated by the selected program information to the program. And a step for receiving the corresponding stream.

  With this configuration, the stream acquisition apparatus can receive selected program information indicating a program to be selected from the reproduction processing apparatus during the authentication process or before the authentication process is performed. Processing can be performed in parallel. As a result, the time required to execute the tuning process and the authentication process is shortened as compared with the case where the tuning process is performed after receiving the program selection instruction after the authentication process is completed, that is, the serial process is performed. be able to. That is, the stream acquisition device performs the tuning process and the authentication process in parallel, thereby shortening the time until the tuning process and the authentication process are completed, and designates the program selection instruction after receiving the program selection instruction from the reproduction processing apparatus. It is possible to shorten the time until the stream corresponding to the programmed program is transmitted to the reproduction processing apparatus.

  According to the present invention, it is possible to reduce the time required for selecting a program in a configuration for processing a received program.

It is a figure which shows the structure of the program processing system which concerns on embodiment of this invention. It is a figure which shows the structure of the digital media server (DMS) apparatus which concerns on embodiment of this invention. It is a figure which shows the structure of the digital media reproduction | regeneration (DMP) apparatus which concerns on embodiment of this invention. It is a figure which shows an example of CDS which concerns on embodiment of this invention. It is a figure which shows an example of the sequence of the operation | movement procedure of the program processing in the program processing system which concerns on embodiment of this invention. It is a figure which shows an example of the sequence of the operation | movement procedure at the time of performing an authentication process and a receiving destination change process in parallel using the port number which concerns on embodiment of this invention. It is a figure which shows an example of the sequence of the operation | movement procedure at the time of performing an authentication process and a receiving destination change process in parallel using the tune message which concerns on embodiment of this invention. It is a figure for demonstrating the problem that delay time generate | occur | produces in the program processing system which concerns on embodiment of this invention. It is the flowchart which defined the operation | movement procedure for suppressing generation | occurrence | production of the extra waiting time of the stream by the packet deletion part in the DMS apparatus which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Configuration of program processing system]
FIG. 1 is a diagram showing a configuration of a program processing system according to an embodiment of the present invention.

  Referring to FIG. 1, a program processing system 10 includes a digital media server device (stream acquisition device) 11, a digital media playback device (playback processing device) 12, and a network 13. Hereinafter, the digital media server device 11 is referred to as a DMS device 11, and the digital media playback device 12 is referred to as a DMP device 12.

  When the DMS device 11 and the DMP device 12 are connected via the network 13, they recognize each other's presence by UPnP (Universal Plug and Play). UPnP is a base of a procedure for communication between devices, which is defined in the guidelines of DLNA (Digital Living Network Alliance). Next, the DMS device 11 and the DMP device 12 perform communication by SOAP (Simple Object Access Protocol) using a protocol such as HTTP (HyperText Transfer Protocol), exchange messages, and perform a predetermined initial operation.

  The DMS apparatus 11 acquires and processes a stream obtained by dividing information of one or more programs into a plurality of packets. For example, the DMS device 11 acquires and processes a stream according to the MPEG2-TS (Moving Picture Experts Group 2 Transport Stream) standard in the tuning unit.

  For example, when the DMS device 11 distributes a received stream via a network 13 such as a LAN, it is necessary to comply with DTCP-IP regulations. That is, the DMS device 11 performs AKE (mutual authentication and key exchange) with the DTCP compatible device, encrypts the stream with the CCI (copy control information) added thereto using the public key received from the DMP device 12 in the AKE. Must be delivered. Further, the DMS device 11 cannot include information on a plurality of programs in the stream to be distributed.

  The DMP device 12 uses the private key paired with the public key transmitted to the DMS device 11 to decrypt the stream distributed by the DMS device 11, and displays the live content included in the stream on, for example, a display device .

  The DMP device 12 can change the live content distributed by the DMS device 11 by, for example, requesting the DMS device 11 to switch the channel to be received. Further, the DMP device 12 can switch the image quality of the distributed live content by transmitting transcode information to the DMS device 11.

  The number of DMS devices 11 connected to the network 13 is not limited to one, and a plurality of DMS devices 11 may be connected to the network 13. Further, the number of DMP devices 12 connected to the network 13 is not limited to one, and a plurality of DMP devices 12 may be connected to the network 13.

[Device configuration]
Next, the DMS device 11 and the DMP device 12 will be described in more detail.

  FIG. 2 is a diagram showing a configuration of a digital media server (DMS) apparatus according to the embodiment of the present invention.

  FIG. 3 is a diagram showing a configuration of a digital media playback (DMP) apparatus according to the embodiment of the present invention.

  Referring to FIG. 2, the DMS device 11 includes a tuning unit 32, a tuning control unit 33, a transcode processing unit 34, a content recording unit 36, an encryption processing unit 37, a communication unit 38, and a packet deletion unit. 40, a storage unit 41, and a selected program receiving unit 42. The selected program receiving unit 42 includes a server-side authentication processing unit 35 and a server-side device detection unit 39. Note that the tuning unit 32 may be provided outside the DMS device 11.

  The communication unit 38 transmits / receives authentication information, a message including a tune message, a stream, and the like via the network 13 with another apparatus. The content recording unit 36 is an HDD (Hard Disk Drive), for example, and holds recorded program content. The storage unit 41 is a memory such as a DRAM (Dynamic Random Access Memory), for example, and stores various types of information exchanged between the units in the DMS device 11.

  With reference to FIG. 3, the DMP device 12 includes an operation receiving unit 52, a control unit 53, a communication unit 55, a decoding processing unit 56, a video output unit 57, a storage unit 58, and a selected program specifying unit 59. With. The selected program specifying unit 59 includes a playback-side device detection unit 51 and a playback-side authentication processing unit 54.

  The communication unit 55 transmits / receives authentication information, a message including a tune message, a stream, and the like to / from other devices via the network 13. The storage unit 58 is a memory such as a DRAM (Dynamic Random Access Memory), for example, and stores various types of information exchanged between the units in the DMP device 12.

  In the DMS device 11, the selected program receiving unit 42 receives selected program information indicating a program to be selected. Specifically, the selected program receiving unit 42 is transmitted to the port number of the port that received the authentication request transmitted from the other device to the server side authentication processing unit 35, or transmitted from the other device to the server side device detecting unit 39. The received tune message is received as selected program information.

  The server-side authentication processing unit 35 performs authentication processing (AKE) with the DMP device 12. Specifically, the server-side authentication processing unit 35 starts AKE by receiving an authentication request from the DMP device 12 by TCP / IP. At this time, the server-side authentication processing unit 35 holds a plurality of ports and notifies the tuning control unit 33 of the port number of the port that accepted the authentication request. Further, the server side authentication processing unit 35 performs the AKE using the port number of the port that received the authentication request.

  The port number of each port held by the server-side authentication processing unit 35 is recorded in association with, for example, a tuning destination, a channel, and transcode information in a CDS (Content Directory service) held in the storage unit 41. That is, the program to be selected can be specified based on the port number.

FIG. 4 is a diagram showing an example of the CDS according to the embodiment of the present invention.
Referring to FIG. 4, the tuning destination represents a physical channel of a radio signal received by tuning unit 32. When a plurality of program programs are included in the stream extracted from the radio signal received by the tuning unit 32, the channel is used to distinguish these program programs. Therefore, the tuning destination and the channel are generally different.

  The server-side authentication processing unit 35 holds a server-side public key that is a pair of a server-side secret key and a server-side secret key issued by a DTLA (Digital Transmission Licensing Administrator). As a result, the server-side authentication processing unit 35 authenticates whether the DMP device 12 is a legitimate device that holds a certificate issued by DTLA.

  When the authentication is successful, the server-side authentication processing unit 35 exchanges the reproduction-side public key held by the reproduction-side authentication processing unit 54 and the server-side public key held by itself, and ends AKE. Then, the server side authentication processing unit 35 outputs the reproduction side public key acquired by the exchange to the tuning control unit 33.

  When receiving the notification of the port number from the server-side authentication processing unit 35, the tuning control unit 33 refers to the CDS shown in FIG. 4 and extracts the tuning destination, channel, and transcode information associated with the port number. Then, the tuning control unit 33 outputs the extracted tuning destination to the tuning unit 32. Further, the tuning control unit 33 notifies the transcode processing unit 34 of the extracted channel and transcode information.

  Further, when receiving the channel and transcode information from the server-side device detection unit 39, the tuning control unit 33 refers to the CDS shown in FIG. 4 and outputs the tuning destination corresponding to the received channel to the tuning unit 32. Alternatively, the received channel and transcode information may be notified to the transcode processing unit 34.

  When the tuning control unit 33 receives the reproduction-side public key from the server-side authentication processing unit 35, the tuning control unit 33 notifies the reproduction-side public key to the encryption processing unit 37 that performs encryption processing corresponding to DTCP-IP.

  When the tuning control unit 33 receives a program selection instruction from another device, the tuning control unit 33 causes the tuning unit 32 to acquire a stream corresponding to the program specified by the program selection instruction. Specifically, when the tuning control unit 33 receives a channel change command from the DMP device 12, the tuning control unit 33 causes the tuning unit 32 to acquire a stream corresponding to the program specified by the channel change command.

  The tuning unit 32 selectively tunes and amplifies the radio signal in the frequency band corresponding to the tuning destination received from the tuning control unit 33 in the radio signal received by the antenna 31, for example, and performs analog-digital conversion. To extract the stream. That is, the tuning unit 32 extracts a stream transmitted by a specific station-side device by selecting a tuning destination received from the tuning control unit 33. The station-side device may be a server compatible with IPTV (Internet Protocol Television) that transmits a stream, for example, by an FTTH (Fiber To The Home) wired system using an optical fiber as a transmission path. Then, the tuning unit 32 outputs the extracted stream to the transcode processing unit 34.

  The stream includes a plurality of TS (Transport Stream) packets, and each TS packet includes a PID (Packet Identification) that is an identifier. The stream includes a TS packet indicating PSI (Program Specific Information) in addition to a video TS packet indicating program video and an audio TS packet indicating program audio. This PSI includes a PAT (Program Association Table) and a PMT (Program Map Table). The PAT includes one or more programs included in the stream, that is, a channel ID that is an identifier of one or more programs that are currently being broadcast, and a PMT PID that includes information on each broadcast channel. The PMT includes PIDs of video TS packets and audio TS packets that include the contents of the corresponding program. PAT and PMT are repeatedly transmitted from the station side device at predetermined intervals.

  That is, the plurality of TS packets in the stream includes a video TS packet and an audio TS packet, which are playback target packets indicating video or audio of the program. The plurality of TS packets in the stream include a PMT packet that is generated corresponding to a program and includes a PID of a reproduction target packet of the corresponding program, and a PAT packet that includes a PID of one or more PMT packets.

  In order to deliver the stream extracted by the tuning unit 32 to the DMP device 12, the transcode processing unit 34 performs the following processing according to the DTCP-IP rules. That is, the transcode processing unit 34 inserts a DTCP descriptor into the stream. The DTCP descriptor includes CCI information indicating copy restriction conditions such as copy never (CN) and copy one generation (COG).

  Further, the transcode processing unit 34 performs processing for converting the stream into a partial TS in accordance with the guidelines set by DLNA. That is, for example, when a plurality of programs are included in the stream, the transcode processing unit 34 generates a stream including only the program corresponding to the channel notified by the tuning control unit 33. At this time, the transcode processing unit 34 rewrites the contents of the PMT as necessary. This is because a plurality of programs cannot be included in the stream to be distributed according to the DTCP-IP regulations.

  When the transcode processing unit 34 receives the transcode information notified by the tuning control unit 33, the transcode processing unit 34 performs image quality conversion processing when it is necessary to convert the image quality of the content to be distributed. The transcode information is, for example, “real”, “3 times compression”, or “10 times compression”, and the image quality of the program distributed by the stream is designated by these, and the image quality becomes rough in that order.

  The transcode processing unit 34 outputs the partial TS stream to the packet deletion unit 40. Note that the transcode processing unit 34 performs the above-described processing on the stream including the recorded content even when the recorded content recorded in the content recording unit 36 is distributed.

  When the packet deletion unit 40 outputs the stream received from the transcode processing unit 34 to the encryption processing unit 37, the packet deletion unit 40 discards the received stream packet as necessary. Specifically, the packet deleting unit 40 discards the packet of the stream received from the transcode processing unit 34 when the encryption processing unit 37 has not received the reproduction side public key from the tuning control unit 33. In addition, when the encryption processing unit 37 receives the reproduction-side public key from the tuning control unit 33, the packet deletion unit 40 outputs the stream packet received from the transcode processing unit 34 to the encryption processing unit 37.

  The encryption processing unit 37 performs an encryption process on the stream received from the packet deletion unit 40 in accordance with the DTCP-IP rules. That is, the encryption processing unit 37 encrypts the stream received from the packet deletion unit 40 using the reproduction-side public key notified from the tuning control unit 33. The encryption processing unit 37 uses, for example, a 128-bit AES (Advanced Encryption Standard) system in the encryption process. Then, the encryption processing unit 37 transmits the encrypted stream to the DMP device 12 via the communication unit 38 and the network 13.

  For example, when the DMS device 11 is newly connected to the network 13 or when another device is newly connected to the network 13 connected to the DMS device 11, the server-side device detection unit 39 performs a predetermined operation based on UPnP. Perform initial operation.

  The server-side device detection unit 39 transmits and receives messages by communication using SOAP. The server side device detection unit 39 receives, for example, a tune message. The tune message includes a channel and transcode information desired by the device that has transmitted the tune message. The server-side device detection unit 39 outputs the channel and transcode information included in the tune message to the tuning control unit 33.

  In the DMP device 12, the selected program specifying unit 59 transmits selected program information indicating a program to be selected. Specifically, the selected program designating unit 59, for example, the port number of the transmission destination of the authentication request transmitted from the reproduction side authentication processing unit 54 to the other device, or the tune transmitted from the reproduction side device detection unit 51 to the other device. A message is transmitted as selected program information.

  For example, when the DMP device 12 is newly connected to the network or when another device is newly connected to the network connected to the DMP device 12, the playback-side device detection unit 51 performs a predetermined initial operation based on UPnP. I do. At this time, the playback-side device detection unit 51 acquires the CDS shown in FIG. 4 from the DMS device 11 as described later. The acquired CDS is held in the storage unit 58, for example.

  Further, the playback-side device detection unit 51 transmits and receives a message by communication using SOAP. When receiving the channel and transcode information from the control unit 53, for example, the playback-side device detection unit 51 transmits a tune message including the channel and transcode information to the DMS device 11.

  The operation reception unit 52 receives an operation by the user. For example, when the user accepts a channel change operation or an image quality change operation by a user using a remote controller, the operation accepting unit 52 notifies the control unit 53 of transcoded information including the designated channel or the designated image quality.

  When receiving the notification of the channel and transcode information from the operation receiving unit 52, the control unit 53 refers to the CDS shown in FIG. 4 to identify and identify the port number corresponding to the channel and transcode information. The reproduction side authentication processing unit 54 is notified as selected program information indicating a program whose port number is to be selected.

  Further, when the control unit 53 receives the notification of the channel and transcode information from the operation reception unit 52, the control unit 53 may output the channel and transcode information to the reproduction side device detection unit 51 as selected program information indicating the program to be selected. Good.

  In addition, the control unit 53 transmits a program selection instruction to another apparatus, and causes the other apparatus to acquire a stream corresponding to the program specified by the program selection instruction. Specifically, the control unit 53 causes the DMS device 11 to acquire a stream corresponding to the program specified by the channel change command by transmitting the channel change command to the tuning control unit 33 in the DMS device 11.

  The playback-side authentication processing unit 54 performs authentication processing (AKE) with the DMS device 11. Specifically, the playback-side authentication processing unit 54 holds a playback-side public key that is a pair of a playback-side secret key and a playback-side secret key issued by DTLA. The playback-side authentication processing unit 54 starts AKE by transmitting an authentication request to the DMS device 11 using TCP / IP. At this time, the reproduction-side authentication processing unit 54 designates the port number notified from the control unit 53 to the transmission destination of the packet including the authentication request, for example.

  The reproduction side authentication processing unit 54 authenticates whether the DMS device 11 is a legitimate device holding a certificate issued by DTLA by performing an AKE with the server side authentication processing unit 35. Then, when the authentication is successful, the reproduction side authentication processing unit 54 exchanges the server side public key held by the server side authentication processing unit 35 and the reproduction side public key held by itself, and ends the AKE.

  In response to a request from the decryption processing unit 56, the reproduction side authentication processing unit 54 outputs a reproduction side secret key necessary for decryption processing of the encrypted stream to the decryption processing unit 56.

  The decryption processing unit 56 performs decryption processing on the encrypted stream received via the network 13 and the communication unit 55. That is, the decryption processing unit 56 decrypts the encrypted stream using the reproduction side secret key received from the reproduction side authentication processing unit 54. The decoding processing unit 56 outputs the decoded stream to the video output unit 57.

  The video output unit 57 decodes the decoded stream received from the decoding processing unit 56, and outputs a video signal and an audio signal to the display device by, for example, HDMI (High-Definition Multimedia Interface).

[basic action]
The DMS apparatus 11 and the DMP apparatus 12 in the program processing system according to the embodiment of the present invention read and execute a program including each step of the following sequences from a memory (not shown). This program can be installed externally. The installed program is distributed in a state stored in a recording medium, for example.

  FIG. 5 is a diagram showing an example of a sequence of an operation procedure of program processing in the program processing system according to the embodiment of the present invention.

  Referring to FIG. 5, first, when receiving a channel change operation or an image quality change operation by the user, the operation receiving unit 52 in the DMP device 12 notifies the control unit 53 of the designated channel or transcode information (step S53). S100).

  Next, when receiving the notification of the channel and transcode information from the operation receiving unit 52, the control unit 53 outputs a connection request for connecting to the DMS device 11 to the reproduction side authentication processing unit 54 (step S102).

  Next, when receiving a connection request from the control unit 53, the playback-side authentication processing unit 54 starts AKE by transmitting an authentication request to the server-side authentication processing unit 35 in the DMS device 11 (step S104).

  Next, when receiving an authentication request from the reproduction side authentication processing unit 54, the server side authentication processing unit 35 performs an authentication process with the reproduction side authentication processing unit 54. At this time, the server-side authentication processing unit 35 confirms whether or not the DMP device 12 is a device that has obtained a valid DTLA license. Further, the playback-side authentication processing unit 54 confirms whether or not the DMS device 11 is a device that has obtained a valid DTLA license. If at least one of the server-side authentication processing unit 35 and the reproduction-side authentication processing unit 54 cannot confirm the normality of the device that is the connection partner, the process ends (step S106).

  Next, when the authenticity of the DMP device 12 is confirmed by the authentication process, the server-side authentication processing unit 35 transmits a server-side public key used for stream encryption to the reproduction-side authentication processing unit 54. When the authenticity of the DMS device 11 is confirmed by the authentication process, the reproduction side authentication processing unit 54 transmits the reproduction side public key used for stream encryption to the server side authentication processing unit 35 (step S108). This completes the AKE from the authentication request (step S104) to the key exchange (step S108).

  Next, when the reproduction side authentication processing unit 54 receives the server side public key transmitted from the server side authentication processing unit 35, the reproduction side authentication processing unit 54 sends an authentication processing completion notification including the success of authentication to the control unit 53 together with the server side public key. Output (step S110).

  When the server-side authentication processing unit 35 receives the reproduction-side public key transmitted from the reproduction-side authentication processing unit 54, the server-side authentication processing unit 35 notifies the tuning control unit 33 together with the reproduction-side public key, an authentication process completion notification including that the authentication has been successful. Output (step S112).

  Next, when receiving the authentication process completion notification from the playback-side authentication processing unit 54, the control unit 53 sends a channel change command (HTTP Get) including a request to change the channel of the program received by the DMS device 11 to the DMS device. 11 to the tuning control unit 33. At this time, the control unit 53 includes the channel and transcode information received from the operation receiving unit 52 in the channel change command (step S114).

  Next, when receiving the channel change command from the control unit 53, the tuning control unit 33 refers to the CDS, extracts the tuning destination corresponding to the channel included in the channel changing command, and changes the tuning destination including the tuning destination. The command is output to the tuning unit 32 (step S116).

  Also, the tuning control unit 33 outputs a transcode change command including the channel and transcode information included in the channel change command to the transcode processing unit 34 (step S118).

  In addition, the tuning control unit 33 outputs a transfer command including a request to transmit the encrypted stream to the DMP device 12 to the encryption processing unit 37. At this time, the tuning control unit 33 includes the reproduction-side public key received from the DMP device 12 in the transfer command (step S120).

  Next, when receiving the tuning destination change command from the tuning control unit 33, the tuning unit 32 selects a tuning destination included in the tuning destination change command. Next, the tuning unit 32 acquires a stream transmitted by the selected station-side device (step S122).

  Next, the tuning unit 32 outputs the acquired stream to the transcode processing unit 34 (step S124).

  Next, the transcode processing unit 34 inserts a DTCP descriptor into the stream received from the tuning unit 32. Further, the transcode processing unit 34 generates a stream including only the program corresponding to the designated channel based on the channel and the transcode information received from the tuning control unit 34, and sets the image quality of the program included in the stream. If conversion is necessary, image quality conversion processing is performed (step S126). This completes the partial TS conversion of the stream.

  Next, the transcode processing unit 34 outputs the partial TS stream to the encryption processing unit 37 (step S128).

  Next, when the encryption processing unit 37 receives the stream from the transcode processing unit 34, the encryption processing unit 37 uses the reproduction-side public key included in the transfer command received from the tuning control unit 33 to encrypt the stream according to the DTCP-IP regulations. Processing is performed (step S130).

  Next, the encryption processing unit 37 transmits the encrypted stream to the decryption processing unit 56 in the DMP device 12 via the communication unit 38 (step S132). At this time, since the stream to be transmitted is encrypted, it is protected from unauthorized copying or falsification during digital transfer.

  Next, when the decryption processing unit 56 receives the encrypted stream from the encryption processing unit 37 in the DMS device 11, the decryption processing unit 56 obtains the reproduction-side secret key necessary for decrypting the stream from the reproduction-side authentication processing unit 54, The stream is decoded (step S134).

  Next, the decoding processing unit 56 outputs the decoded stream to the video output unit 57 (step S136). The video output unit 57 generates a video signal based on the stream received from the decoding processing unit 56, for example, and plays back the program included in the stream on the display device.

  With the above operation, the program received by the DMS device 11 is distributed via the IP network based on the DTCP-IP regulations.

  Incidentally, the time required for AKE between the DMS device 11 and the DMP device 12 shown in steps S104 to S108 is approximately 400 milliseconds. Further, the time required for the tuning destination changing process in the tuning unit 32 shown in step S122 is approximately 100 milliseconds to 500 milliseconds. Further, the time required for the transcode processing in the transcode processing unit 34 shown in step S126 is approximately 1 second at maximum.

  That is, after the DMP device 12 receives a channel change operation by the user, it takes about 1 to 2 seconds to reproduce the newly acquired program, that is, the live content, on the display device. It will end up.

  This is because each process is performed in series in the order of AKE, synchronization destination change process, and transcode process, so the time until the live content is acquired is the sum of the time required for each process. is there.

  For example, if processing can be performed in parallel rather than serially in the above processing, there is a possibility that the time until the live content is acquired can be shortened.

  The operation of the program processing system when performing tuning destination change processing and transcoding processing in parallel with AKE is shown below.

[Program selection operation using port number]
FIG. 6 is a diagram showing an example of a sequence of operation procedures when the authentication process and the reception destination change process are performed in parallel using the port number according to the embodiment of the present invention.

  Referring to FIG. 6, when DMP device 12 is connected to network 13 connected to, for example, DMS device 11, the following initial operation is performed according to the specifications defined in UPnP.

  When the playback-side device detection unit 51 recognizes that it is newly connected to the network 13, the playback-side device detection unit 51 performs device detection processing (Discover) and searches for a device connected to the network 13. Next, the playback-side device detection unit 51 recognizes that the DMS device 11 is connected to the network 13, for example. On the other hand, the server-side device detection unit 39 recognizes that the DMP device 12 is connected to the network 13. Next, the playback-side device detection unit 51 and the server-side device detection unit 39 mutually notify the IP address and port number (step S202).

  Next, the playback-side device detection unit 51 and the server-side device detection unit 39 acquire device information (Device Description) by connecting to the acquired IP address and port number. The playback-side device detection unit 51 acquires information about the service provided by the DMS device 11 and the standby port number from the device information acquired from the server-side device detection unit 39, for example (step S204).

  Next, the playback-side device detection unit 51 and the server-side device detection unit 39 mutually acquire protocol information (GetProtocolInfo). At this time, the playback-side device detection unit 51 acquires, for example, a protocol that can be used for data transfer with the DMS device 11 or a format such as an image, audio, or video provided by the DMS device 11 (step S206).

  Next, the playback-side device detection unit 51 and the server-side device detection unit 39 mutually acquire owned content information (Browse) (step S208). The playback-side device detection unit 51 can browse a directory in which content held by the DMS device 11 is stored, for example, by connecting to a standby port included in the device information. At this time, the playback-side device detection unit 51 acquires a CDS including information related to the content. The acquired CDS is held in the storage unit 58, for example. Thus, the initial operation between the DMS device 11 and the DMP device 12 is completed.

  Next, for example, it is assumed that the user performs an operation to change the channel to 153 channels and the image quality to 3 times compression in the operation reception unit 52 of the DMP device 12. At this time, the operation reception unit 52 notifies the control unit 53 of “153” that is the changed channel and “three times compression” that is the transcode information (step S210).

  Next, upon receiving notification of channel and transcode information from the operation reception unit 52, the control unit 53 refers to the CDS acquired from the DMS device 11. Referring to FIG. 4, control unit 53 extracts a port number “51153” in CDS based on “153” indicating a channel and “three times compression” indicating transcode information. Next, the control unit 53 outputs a connection request including the extracted port number to the reproduction side authentication processing unit 54 (step S212).

  Referring to FIG. 6 again, next, when the reproduction-side authentication processing unit 54 receives a connection request from the control unit 53, it confirms that the port number included in the connection request is “51153”. Next, the playback side authentication processing unit 54 sets the port number of the transmission destination of the authentication request to 51153, and starts AKE by transmitting the authentication request to the DMS device 11 (step S214).

  Next, when receiving the authentication request from the reproduction-side authentication processing unit 54, the server-side authentication processing unit 35 confirms that the port number of the port that has received the authentication request is 51153. Next, the server-side authentication processing unit 35 outputs a port number notification including the port number to the tuning control unit 33 (step S216).

  Next, when receiving the port number notification from the server-side authentication processing unit 35, the tuning control unit 33 confirms that the port number included in the port number notification is “51153”. Next, the tuning control unit 33 refers to the CDS shown in FIG. 4, “16” as the tuning destination associated with the port number “51153”, “153” as the channel, and “transcode information”. “3 times compression” is extracted.

  Next, the tuning control unit 33 outputs a tuning destination change command including the extracted tuning destination “16” to the tuning unit 32 (step S218).

  Further, the tuning control unit 33 outputs a transcode change command including “153” as the extracted channel and “three times compression” as the transcode information to the transcode processing unit 34 (step S220).

  Next, when receiving the tuning destination change command from the tuning control unit 33, the tuning unit 32 selects the 16 channels that are the tuning destinations included in the tuning destination change command. Next, the tuning unit 32 acquires a stream transmitted by the selected station side device (step S222).

  Next, the tuning unit 32 outputs the acquired stream to the transcode processing unit 34 (step S224).

  Next, the transcode processing unit 34 confirms that the channel is “153” and the transcode information is “triple compression” in the transcode change command received from the tuning control unit 33. Next, the transcode processing unit 34 extracts a packet related to a 153 channel program, inserts a DTCP descriptor, and compresses the image quality three times for the stream received from the tuning unit 32, and converts the stream into a partial TS. (Step S226).

  Next, the transcode processing unit 34 outputs the partial TS stream to the encryption processing unit 37 via the packet deletion unit 40 (step S228).

  Further, when receiving the authentication request shown in step S214 from the reproduction side authentication processing unit 54, the server side authentication processing unit 35 performs an authentication process with the reproduction side authentication processing unit 54. At this time, the server-side authentication processing unit 35 confirms whether or not the DMP device 12 is a device that has obtained a valid DTLA license. Further, the playback-side authentication processing unit 54 confirms whether or not the DMS device 11 is a device that has obtained a valid DTLA license. If at least either the server-side authentication processing unit 35 or the reproduction-side authentication processing unit 54 cannot confirm the validity of the connection partner device, the process ends (step S230).

  Next, when the authenticity of the DMP device 12 is confirmed by the authentication process, the server-side authentication processing unit 35 transmits a server-side public key used for content encryption to the reproduction-side authentication processing unit 54. When the authenticity of the DMS device 11 is confirmed by the authentication process, the reproduction side authentication processing unit 54 transmits a reproduction side public key used for content encryption to the server side authentication processing unit 35 (step S232). As described above, the AKE by the authentication request (step S214), the authentication process (step S230), and the key exchange (step S232) is completed.

  Next, when the server-side authentication processing unit 35 receives the reproduction-side public key transmitted by the reproduction-side authentication processing unit 54, the server-side authentication processing unit 35 sends an authentication process completion notification including that the authentication has been successful together with the reproduction-side public key to the tuning control unit 33. (Step S234).

  Upon receiving the server-side public key transmitted from the server-side authentication processing unit 35, the playback-side authentication processing unit 54 outputs an authentication process completion notification including the success of authentication to the control unit 53 together with the server-side public key. (Step S236).

  Next, when receiving the authentication processing completion notification from the playback-side authentication processing unit 54, the control unit 53 sends a channel change command (HTTP Get) including a request to change the channel of the program received by the DMS device 11 to the DMS device. 11 to the tuning control unit 33. (Step S238). At this time, the control unit 53 includes the channel and transcode information received from the operation receiving unit 52 in the channel change command.

  Next, when the tuning control unit 33 receives a channel change command from the control unit 53 in the DMP device 12 and receives an authentication processing completion notification including the playback-side public key from the server-side authentication processing unit 35, the tuning control unit 33 performs an encryption process. A transfer command including the fact that the performed stream is transmitted to the DMP device 12 is output to the encryption processing unit 37. At this time, the tuning control unit 33 includes the reproduction-side public key in the transfer command (step S240). In addition, the tuning control unit 33 does not need to output the tuning destination change command and the transcode change command because they have already been output in step S218 and step S220.

  Next, upon receiving the stream from the transcode processing unit 34 and the transfer command from the tuning control unit 33, the cryptographic processing unit 37 receives the reproduction-side public key included in the transfer command in accordance with the DTCP-IP regulations. In step S242, the stream is encrypted.

  Next, the encryption processing unit 37 transmits the encrypted stream to the decryption processing unit 56 in the DMP device 12 via the communication unit 38 (step S244). At this time, since the stream to be transmitted is encrypted, it is protected from unauthorized copying or falsification during digital transfer.

  Next, when the decryption processing unit 56 receives the stream encrypted by the encryption processing unit 37 in the DMS device 11, the decryption processing unit 56 obtains the reproduction-side secret key necessary for decrypting the stream from the reproduction-side authentication processing unit 54, The decoding process of the stream is performed (step S246).

  Next, the decoding processing unit 56 outputs the decoded stream to the video output unit 57 (step S248). The video output unit 57 generates a video signal based on the stream received from the decoding processing unit 56, for example, and plays back the program included in the stream on the display device.

  Through the above operation, the live content received by the DMS device 11 is distributed via the IP network based on the DTCP-IP regulations.

  The AKE shown in steps S214, S230, and S232 in the above is performed in parallel with the tuning destination changing process and transcoding process shown in steps S218 to S226. Hereinafter, this operation is referred to as a parallel operation. Further, the AKE, the tuning destination changing process, and the transcoding process shown in FIG.

  The time until the parallel operation is completed is shorter than the time until the serial operation is completed. Therefore, it is possible to reduce the time from when the DMP device 12 receives a channel change operation by the user until the newly acquired live content is reproduced on the display device.

  Also, the DMS device 11 extracts the channel and transcode information requested by the DMP device 12 from the port number of the port that received the authentication request. Therefore, it is possible to perform tuning destination change processing and transcoding processing in parallel with AKE without adding a new command using original communication, so the time from channel change operation to playback of live content is shortened. can do.

  In addition, since it is not necessary to perform original communication between the DMS device 11 and the DMP device 12, it is not necessary to determine specifications between the devices in advance. Therefore, the DMP device 12 does not need to satisfy a specific specification, and only needs to follow an existing framework such as DTCP-IP regulations.

[Program selection operation using tune message]
FIG. 7 is a diagram showing an example of a sequence of operation procedures when the authentication process and the reception destination change process are performed in parallel using the tune message according to the embodiment of the present invention.

  Referring to FIG. 7, when DMP device 12 is connected to network 13 connected to, for example, DMS device 11, the following initial operation is performed according to the specifications defined in UPnP. Subsequent initial operations (steps S302 to S308) are the same as the operations (steps S202 to S208) shown in the sequence diagram of FIG. 6, and thus detailed description will not be repeated here.

  Next, for example, it is assumed that the user performs an operation to change the channel to 102 channels and the image quality to a mobile-compatible image quality in the operation receiving unit 52 of the DMP device 12. At this time, the operation reception unit 52 notifies the control unit 53 of “102” that is the changed channel and “10 times compression” that is the transcode information (step S310).

  Next, when the control unit 53 receives the notification of the channel and transcode information from the operation receiving unit 52, the control unit 53 sends a tuning request including “102” indicating the channel and “10 times compression” indicating the transcode information. It outputs to the detection part 51 (step S312).

  In addition, the control unit 53 outputs a connection request for connecting to the DMS device 11 to the reproduction side authentication processing unit 54 (step S314).

  Next, when receiving the tuning request from the control unit 53, the playback-side device detection unit 51 confirms that the channel included in the tuning request is “102” and the transcode information is “10 times compression”. Next, the playback-side device detection unit 51 transmits a tune message including the channel and transcode information to the server-side device detection unit 39 in the DMS device 11 by SOAP (step S316). In addition, the playback-side apparatus detection unit 51 sets the port number of the transmission destination of the tune message as “52102”, which is a port number corresponding to “102” for the channel and “10 times compression” for the transcode information in the CDS shown in FIG. To the DMS device 11.

  Next, when the server side device detection unit 39 receives the tune message from the playback side device detection unit 51 by SOAP, the channel included in the tune message is “102” and the transcode information is “10 times compression”. Confirm. Next, the server side device detection unit 39 outputs a tuning request including the channel and transcode information to the tuning control unit 33 (step S318).

  Next, when receiving the tuning request from the server-side device detection unit 39, the tuning control unit 33 confirms that the channel included in the tuning request is “102” and the transcode information is “10 times compression”. At this time, the tuning control unit 33 extracts that the tuning destination of the 102 channel is 15 channels in the physical channel based on, for example, the CDS shown in FIG.

  Next, the tuning control unit 33 outputs a tuning destination change command including the extracted tuning destination “15” to the tuning unit 32 (step S320).

  Further, the tuning control unit 33 outputs a transcode change instruction including “102” as the confirmed channel and “10 times compression” as the transcode information to the transcode processing unit 34 (step S322).

  Next, when receiving the tuning destination change command from the tuning control unit 33, the tuning unit 32 selects the 15 channels that are the tuning destinations included in the tuning destination change command. Next, the tuning unit 32 acquires a stream transmitted by the selected station-side device (step S324).

  Next, the tuning unit 32 outputs the acquired stream to the transcode processing unit 34 (step S326).

  Next, the transcode processing unit 34 confirms that the channel is “102” and the transcode information is “10 times compression” in the transcode change command received from the tuning control unit 33. Next, the transcode processing unit 34 extracts a packet related to the program of the 102 channel, inserts a DTCP descriptor, and converts it into a mobile-compatible image quality for the stream received from the tuning unit 32, and converts the stream to the partial. The TS is converted (step S328).

  Next, the transcode processing unit 34 outputs the partial TS stream to the encryption processing unit 37 via the packet deletion unit 40 (step S330).

  Further, when receiving the connection request shown in step S314 from the control unit 53, the reproduction side authentication processing unit 54 starts the AKE by transmitting the authentication request to the server side authentication processing unit 35 (step S332).

  Next, when receiving the authentication request shown in step S332 from the reproduction side authentication processing unit 54, the server side authentication processing unit 35 performs an authentication process with the reproduction side authentication processing unit 54. At this time, the server-side authentication processing unit 35 confirms whether or not the DMP device 12 is a device that has obtained a valid DTLA license. Further, the playback-side authentication processing unit 54 confirms whether or not the DMS device 11 is a device that has obtained a valid DTLA license. If at least one of the server-side authentication processing unit 35 and the reproduction-side authentication processing unit 54 cannot confirm the validity of the connection partner device, the process ends (step S334).

  Next, when the authenticity of the DMP device 12 is confirmed by the authentication process, the server-side authentication processing unit 35 transmits a server-side public key used for content encryption to the reproduction-side authentication processing unit 54. When the authenticity of the DMS device 11 is confirmed by the authentication process, the reproduction side authentication processing unit 54 transmits the reproduction side public key used for content encryption to the server side authentication processing unit 35 (step S336). As described above, the AKE from the authentication request (step S332) to the key exchange (step S336) is completed.

  Next, when the server-side authentication processing unit 35 receives the reproduction-side public key transmitted by the reproduction-side authentication processing unit 54, the server-side authentication processing unit 35 sends an authentication processing completion notification including the fact that the authentication is successful together with the reproduction-side public key. (Step S338).

  When the reproduction side authentication processing unit 54 receives the server side public key transmitted by the server side authentication processing unit 35, the reproduction side authentication processing unit 54 outputs an authentication process completion notification including the fact that the authentication is successful together with the server side public key to the control unit 53. (Step S340).

  Next, when receiving the authentication processing completion notification from the playback-side authentication processing unit 54, the control unit 53 sends a channel change command (HTTP Get) including a request to change the channel of the program received by the DMS device 11 to the DMS device. 11 to the tuning control unit 33. (Step S342). At this time, the control unit 53 includes the channel and transcode information received from the operation receiving unit 52 in the channel change command.

  Next, when the tuning control unit 33 receives a channel change command from the control unit 53 in the DMP device 12 and receives an authentication processing completion notification including the playback-side public key from the server-side authentication processing unit 35, the tuning control unit 33 performs an encryption process. A transfer command including the fact that the performed stream is transmitted to the DMP device 12 is output to the encryption processing unit 37. At this time, the tuning control unit 33 includes the reproduction-side public key in the transfer command (step S344). Further, the tuning control unit 33 does not need to output the tuning destination change command and the transcode change command because they have already been output in step S320 and step S322.

  Next, upon receiving the stream from the transcode processing unit 34 and the transfer command from the tuning control unit 33, the cryptographic processing unit 37 receives the reproduction-side public key included in the transfer command in accordance with the DTCP-IP regulations. In step S346, the stream is encrypted.

  Next, the encryption processing unit 37 transmits the encrypted stream to the decryption processing unit 56 in the DMP device 12 via the communication unit 38 (step S348). At this time, since the stream to be transmitted is encrypted, it is protected from unauthorized copying or falsification during digital transfer.

  Next, when the decryption processing unit 56 receives the encrypted stream from the encryption processing unit 37 in the DMS device 11, the decryption processing unit 56 obtains the reproduction-side secret key necessary for decrypting the stream from the reproduction-side authentication processing unit 54, The stream is decoded (step S350).

  Next, the decoding processing unit 56 outputs the decoded stream to the video output unit 57 (step S352). The video output unit 57 generates a video signal based on the stream received from the decoding processing unit 56, for example, and plays back the program included in the stream on the display device.

  Through the above operation, the live content received by the DMS device 11 is distributed via the IP network based on the DTCP-IP regulations.

  The AKE from step S332 to S336 in the above operates in parallel with the tuning destination changing process and the transcoding process shown in steps S320 to S328, so this operation procedure is a parallel operation.

  The time until the parallel operation is completed is shorter than the time until the serial operation is completed. Therefore, it is possible to reduce the time from when the DMP device 12 receives a channel change operation by the user until the newly acquired live content is reproduced on the display device.

  Further, the specification of UPnP may be expanded, and a chain message transmitted from the playback-side device detection unit 51 to the server-side device detection unit 39 in step S316 may be included in the extended specification. For example, the DMS device 11 and the DMP device 12 satisfying the extended specifications use the tune message until the DMP device 12 receives the channel change operation by the user and reproduces the newly acquired live content on the display device. Can be shortened.

[Causes of increased delay time]
When the parallel operation shown in FIG. 6 and FIG. 7 is performed, the time until the stream received by the DMS device 11 is reproduced by the DMP device 12 may be longer than that when the serial operation is performed. is there. The cause will be described below.

  First, the time required for AKE is defined below as AKE processing time T (AKE). That is, the AKE processing time T (AKE) is transmitted from the control unit 53 in the DMP device 12 after the connection request (for example, step S212 shown in FIG. 6) is transmitted to the tuning control unit 33 along with the reproduction side public key (for example, the authentication completion notification) It is assumed that the time until receiving step S234) shown in FIG.

  Further, the time required for the tuning destination change process is defined below as a tuning destination change processing time T (Tune). That is, the tuning destination change processing time T (Tune) is determined by the tuning unit 32 in the DMS device 11 after the tuning control unit 33 outputs a tuning destination change command (for example, step S218 shown in FIG. 6). It is assumed that time until step S222) shown in FIG. 6 is completed.

  Further, the time required for the transcoding process is defined below as a transcoding processing time T (TC). That is, during the transcoding processing time T (TC), the transcoding processing unit 34 receives the stream (for example, step S224 shown in FIG. 6) from the tuning unit 32 and then outputs the stream (for example, step S228 shown in FIG. 6). Time until.

  Further, the time required for the process of transferring the encrypted stream from the DMS apparatus 11 to the DMP apparatus 12 is defined below as a transfer processing time T (Trns). That is, for the transfer processing time T (Trns), the video output unit 57 in the DMP device 12 is decrypted after the encryption processing unit 37 in the DMS device 11 starts the encryption processing (for example, step S240 shown in FIG. 6). The time until receiving the stream (for example, step S248 shown in FIG. 6).

  The AKE processing time, the tuning destination change processing time, the transcode processing time, and the transfer processing time are overwhelmingly longer than the processing time required for other command transfer, stream transfer, or notification. Accordingly, from when the control unit 53 in the DMP device 12 transmits a connection request (for example, step S212 shown in FIG. 6) until the video output unit 57 receives a stream (for example, step S248 shown in FIG. 6) from the DMS device 11. Is substantially determined by the AKE processing time, the tuning destination change processing time, the transcode processing time, and the transfer processing time.

  FIG. 8 is a diagram for explaining a problem that a delay time occurs in the program processing system according to the embodiment of the present invention.

  Referring to FIG. 8, the time when control unit 53 in DMP device 12 transmits a connection request is set to t0. Further, the time when the tuning unit 32 in the DMS apparatus 11 finishes the tuning destination change process is t2. That is, the time t2 may be regarded as a time when the DMS device 11 starts to acquire a stream. Also, the time at which the video output unit 57 in the DMP device 12 receives the stream from the DMS device 11 is assumed to be t4. The time t4 may be regarded as the time when the newly acquired live content starts to be displayed on the display device connected to the DMP device 12.

  First, it is assumed that the AKE processing time T (AKE) is shorter than the time obtained by adding the transcoding processing time T (TC) to the tuning destination change processing time T (Tune). This is the case, for example, when the partial TS processing in the transcode processing unit 34 is highly loaded.

  For example, in the case of the serial operation shown in FIG. 5, at time t4, as shown in FIG. 8A, at time t0, the AKE processing time T (AKE), the tuning destination change processing time T (Tune), and the transcode processing time This is the time obtained by adding T (TC) and the transfer processing time T (Trns).

  The delay time is defined as the difference between time t4 and time t2. The delay time D1 in FIG. 8A represents how much delay is from the start of acquisition of a new stream at time t2 until the stream is displayed on the screen at time t4.

  Next, it is assumed that the AKE process, the tuning destination change process, the transcode process, and the transfer process shown in FIG. 8A are performed in parallel operations shown in FIGS. In this case, at time t4, as shown in FIG. 8B, the tuning destination change processing time T (Tune), the transcode processing time T (TC), and the transfer processing time T (Trns) are added to the time t0. It is time.

  The time t4 in FIG. 8B is earlier than the time t4 in FIG. This is a result of the AKE process, the tuning destination changing process, and the transcoding process being performed in parallel.

  Further, the delay time D1 in FIG. 8A and the delay time D2 in FIG. 8B are both the transcode processing time T (TC) plus the transfer processing time T (Trns). It is almost the same.

  The fact that the AKE processing time T (AKE) is shorter than the time obtained by adding the transcoding processing time T (TC) to the tuning destination change processing time T (Tune) indicates the following. That is, the encryption processing unit 37 indicates that the reproduction side public key from the tuning control unit 33 is received first from the stream from the transcode processing unit 34 in the serial operation and the parallel operation.

  Therefore, since the encryption processing unit 37 already holds the reproduction-side public key before receiving the stream from the transcode processing unit 34, the encryption processing unit 37 can start the encryption process immediately after receiving the stream. In other words, the stream is processed in the cryptographic processing unit 37 without causing extra standby.

  Further, the stream is processed without stagnation from the tuning unit 32 to the video output unit 57 because the standby destination change process and the transfer process do not cause extra standby.

  Therefore, in the case where the AKE processing time T (AKE) shown in FIGS. 8A and 8B is shorter than the time obtained by adding the transcoding processing time T (TC) to the tuning destination change processing time T (Tune). The delay time is the same regardless of serial operation or parallel operation.

  Next, it is assumed that the AKE processing time T (AKE) is longer than the time obtained by adding the transcoding processing time T (TC) to the tuning destination change processing time T (Tune). This is the case, for example, when the partial TS processing in the transcode processing unit 34 is under low load.

  For example, in the case of the serial operation shown in FIG. 5, at time t4, as shown in FIG. 8C, at time t0, the AKE processing time T (AKE), the tuning destination change processing time T (Tune), and the transcode processing time This is the time obtained by adding T (TC) and the transfer processing time T (Trns).

  For example, in the case of the parallel operation shown in FIGS. 6 and 7, at time t4, as shown in (D) of FIG. 8, AKE processing time T (AKE) and transfer processing time T (Trns) are set at time t0. It is the added time.

  The time t4 in FIG. 8D is earlier than the time t4 in FIG. This is a result of the AKE process, the tuning destination changing process, and the transcoding process being performed in parallel.

  Further, the delay time D3 in FIG. 8C is a time obtained by adding the transfer processing time T (Trns) to the transcode processing time T (TC). On the other hand, the delay time D4 in (D) of FIG. 8 is longer than the time obtained by adding the transfer processing time T (Trns) to the transcode processing time T (TC). That is, the delay time D4 is longer than the delay time D3.

  The fact that the AKE processing time T (AKE) is longer than the time obtained by adding the transcoding processing time T (TC) to the synchronization destination change processing time T (Tune) indicates the following. That is, the encryption processing unit 37 indicates that the stream from the transcode processing unit 34 is received first from the reproduction side public key from the tuning control unit 33 in the parallel operation.

  Accordingly, since the encryption processing unit 37 does not hold the reproduction-side public key when receiving the stream from the transcode processing unit 34, the encryption processing cannot be started immediately. Then, the cryptographic processing unit 37 outputs the stream to, for example, a buffer until receiving the reproduction-side public key. Then, upon receiving the reproduction-side public key from the tuning control unit 33, the encryption processing unit 37 receives the stream held in the buffer 40 and starts the encryption process. That is, the stream is stagnated in the encryption processing unit 37 for an extra waiting time W1.

  On the other hand, in the serial operation, the cryptographic processing unit 37 receives the playback-side public key before the stream. Therefore, the stream is processed in the cryptographic processing unit 37 without causing extra standby.

  Therefore, in the case where the AKE processing time T (AKE) shown in FIGS. 8C and 8D is longer than the time obtained by adding the transcoding processing time T (TC) to the tuning destination change processing time T (Tune). The delay time in the parallel operation is longer than the delay time in the serial operation.

  As described above, it can be understood that the reason why the delay time in the parallel operation becomes longer than the delay time in the serial operation is an extra standby of the stream in the cryptographic processing unit 37. Therefore, there is a possibility that the delay time in the parallel operation can be made equal to the delay time in the serial operation by eliminating the standby, that is, by quickly encrypting the stream that has reached the encryption processing unit 37.

[Program selection operation to reduce unnecessary standby time]
FIG. 9 is a flowchart defining an operation procedure for suppressing the occurrence of an extra stream standby time by the packet deletion unit in the DMS apparatus according to the embodiment of the present invention.

  First, the packet deletion unit 40 in the DMS device 11 starts from the transcode processing unit 34 when the encryption processing unit 37 has not received a transfer command including the reproduction-side public key from the tuning control unit 33 (YES in step S402). Stream, i.e., TS packets are received (YES in step S404), the received TS packets are discarded (step S406).

  Then, it is determined whether or not the cryptographic processing unit 37 has received a transfer command including the reproduction-side public key from the tuning control unit 33 (step S402).

  Next, the packet deletion unit 40 receives the TS packet from the transcode processing unit 34 in a state where the encryption processing unit 37 receives a transfer command including the reproduction side public key from the tuning control unit 33 (YES in step S402). When received, the received packet is output to the encryption processing unit 37. The packet deletion unit 40 outputs the TS packet received from the transcode processing unit 34 to the encryption processing unit 37 until the stream ends (step S408).

  With the above operation, the operation for the packet deletion unit 40 in the DMS device 11 to suppress the occurrence of an extra standby time of the stream is completed.

  With the above operation, the encryption processing unit 37 discards the TS packet, that is, the stream received from the transcode processing unit 34 before receiving the reproduction side public key from the tuning control unit 33. As a result, the encryption processing unit 37 can immediately start the encryption process for the stream received from the transcode processing unit 34 after the discarding process is completed. Therefore, the encryption processing unit 37 can suppress the occurrence of an extra standby time of the stream by performing the encryption process without stagnation of the stream received from the transcode processing unit 34.

  In the above operation, it is assumed that AKE, tuning processing, transcoding processing, and encryption processing are performed. However, when only AKE and tuning processing are performed, the following operations may be performed. That is, the packet deletion unit 40 discards the stream received by the tuning unit 32 until the AKE is completed.

  The DMS device 11 cannot transmit a stream to the DMP device 12 until it receives a channel change command received from the DMS device 12 after AKE. Therefore, the stream received by the tuning unit 32 until the AKE is completed becomes a factor for increasing the delay time. The packet deletion unit 40 can shorten the delay time by discarding the stream received by the tuning unit 32 until the AKE is completed.

  By the way, when performing each process in series in the order of AKE, tuning destination change process, and transcode process, after the DMP device 12 receives a channel change operation by the user, the newly acquired live content is reproduced on the display device. It takes time to complete.

  On the other hand, in the stream acquisition device according to the embodiment of the present invention, the tuning unit 32 selectively receives a stream. The selected program receiving unit 42 performs authentication processing by transmitting / receiving authentication information to / from the playback processing device. After completing the authentication process, the tuning control unit 33 causes the tuning unit 32 for selectively receiving a stream to receive a stream corresponding to the program specified by the program selection instruction received from the playback processing device, and the communication unit 38, information indicating the content of the stream received by the tuning unit 32 is transmitted to the reproduction processing apparatus. When the selected program receiving unit 42 receives the authentication information including the selected program information indicating the program to be selected from the reproduction processing device or receives the selected program information from the reproduction processing device before the authentication processing is performed, Information is output to the tuning control unit 33. Upon receiving the selected program information from the selected program receiving unit 42, the tuning control unit 33 causes the tuning unit 32 to receive a stream corresponding to the program indicated by the selected program information regardless of whether or not the authentication process has been completed. .

  With such a configuration, the DMS device 11 can receive the selected program information indicating the program to be selected during the authentication process or before the authentication process is performed. Therefore, the tuning process and the authentication process in the tuning unit 32 are performed in parallel. Can be done. As a result, the time required to execute the tuning process and the authentication process is shortened as compared with the case where the tuning process is performed after receiving the program selection instruction after the authentication process is completed, that is, the serial process is performed. be able to. That is, the DMS device 11 performs the tuning process and the authentication process in parallel, thereby shortening the time until the tuning process and the authentication process are completed, and designates the program selection instruction after receiving the program selection instruction from the DMP device 12. It is possible to shorten the time until the stream corresponding to the broadcasted program is transmitted to the DMP device 12.

  In the stream acquisition device according to the embodiment of the present invention, the stream acquisition device and the playback processing device transmit and receive information using IP packets. The storage unit 40 stores information indicating the correspondence between the port number of the IP packet and the program. The selected program receiving unit 42 receives the port number of the IP packet including the authentication information from the reproduction processing apparatus as selected program information, and outputs the received port number to the tuning control unit 33. When the tuning control unit 33 receives the port number from the selected program receiving unit, the tuning control unit 33 causes the tuning unit 32 to receive a stream corresponding to the port number based on the information indicating the correspondence acquired from the storage unit 40.

  With such a configuration, the program requested by the DMP device 12 can be specified from the port number of the IP packet including the authentication information. As a result, the DMS device 11 can specify the program requested by the DMP device 12 without using the unique communication that requires the specification to be determined in advance with the DMP device 12. In other words, the DMS device 11 can specify the program requested by the DMP device 12 simply by following the framework of the existing specification.

  In the stream acquisition device according to the embodiment of the present invention, the transcode processing unit 34 converts the stream packet received by the tuning unit 32 into a packet that can be processed by the reproduction processing device. The tuning control unit 33 causes the communication unit 32 to transmit the packet converted by the transcode processing unit 34 to the reproduction processing device. Then, the selected program receiving unit 42 receives selected program information including information used for conversion in the transcode processing unit 34 from the reproduction processing device.

  With this configuration, the DMS device 11 can receive the information necessary for the conversion included in the selected program information during the authentication process or before the authentication process is performed. The packet conversion process and the authentication process in the code processing unit 34 can be performed in parallel. As a result, the time required to execute the authentication process, the tuning process, and the packet conversion process is obtained, and the tuning process and the packet conversion process are performed after receiving the program selection instruction after the authentication process is completed. Compared with the case where processing is performed, it can be shortened. That is, the DMS device 11 shortens the time until the authentication processing, the tuning processing, and the packet conversion processing are completed by performing the tuning processing, the packet conversion processing, and the authentication processing in parallel. It is possible to shorten the time from when the program selection instruction is received until the stream corresponding to the program specified by the program selection instruction is transmitted to the DMP device 12.

  In the stream acquisition device according to the embodiment of the present invention, the encryption processing unit 37 encrypts the packet of the stream received by the tuning unit 32 into a packet that can be decrypted by the reproduction processing device. The tuning control unit 33 causes the communication unit 32 to transmit the packet encrypted by the encryption processing unit 37 to the reproduction processing device. Then, the selected program receiving unit 42 receives the reproduction-side public key used for encryption from the reproduction processing apparatus in the authentication process.

  As described above, the DMS device 11 transmits the packet encrypted using the reproduction-side public key received from the DMP device 12 to the DMP device 12. Thereby, only the DMP device 12 can decrypt the encrypted packet. That is, the packet transmitted to the DMP device 12 is protected from unauthorized copying or alteration during transfer.

  Further, in the stream acquisition device according to the embodiment of the present invention, the packet deletion unit, for the stream corresponding to the program indicated by the selected program information received by the tuning unit 32 until the authentication process is completed, Information indicating the contents is discarded without being transmitted to the reproduction processing apparatus.

  With such a configuration, it is possible to shorten the delay time required until the stream received by the tuning unit 32 is transmitted to the DMP device 12. That is, the tuning process and the authentication process can be performed in parallel. For example, when the tuning process is completed earlier than the authentication process, the following problem occurs. Since the DMS device 11 cannot receive the program selection instruction from the DMP device 12 until the authentication process is completed, the DMS device 11 cannot promptly transmit the stream packet received by the tuning unit 32 to the DMP device 12. If the DMS device 11 transmits a packet that could not be promptly transmitted to the DMP device 12 to the DMP device 12 after receiving the program selection instruction from the DMP device 12 after the completion of the authentication process, the delay time becomes long. On the other hand, the packet deletion unit 41 can shorten the delay time by discarding the packet received by the tuning unit 32 until the authentication process is completed.

  Further, in the stream acquisition device according to the embodiment of the present invention, the encryption processing unit 37 reproduces the packet of the stream received by the tuning unit 32 according to DTCP-IP (Digital Transmission Content Protection-Internet Protocol). The packet is encrypted into a packet that can be decrypted.

  With such a configuration, the DMS device 11 satisfies the DTCP-IP specification, and thus can transmit an encrypted packet to a DMP device that satisfies the specification. In addition, the DMS device 11 can be sold in a country or region that requires the specification to be satisfied.

  Further, in the stream acquisition device according to the embodiment of the present invention, the selected program receiving unit 42 performs an authentication process with the reproduction processing device according to DTCP-IP.

  With such a configuration, since the DMS device 11 satisfies the DTCP-IP specification, it can be connected to a DMS device or a DMP device that satisfies the specification. In addition, the DMS device 11 can be sold in a country or region that requires the specification to be satisfied.

  In the reproduction processing apparatus according to the embodiment of the present invention, the selected program specifying unit 59 performs authentication processing by transmitting / receiving authentication information to / from the stream acquisition apparatus. The control unit 53 controls the selected program specifying unit 59. The control unit 53 causes the selected program specifying unit 59 to include the selected program information indicating the stream to be selectively received by the stream acquisition device in the authentication information and transmit it to the stream acquisition device, or before the authentication process is performed. The selected program information is transmitted to the stream acquisition device. Then, when the authentication processing is completed, the control unit 53 transmits a program selection instruction indicating a stream to be transmitted from the stream acquisition device to its own reproduction processing device, to the stream acquisition device.

  With such a configuration, the DMP device 12 can transmit selected program information indicating a program to be selected during the authentication process or before the authentication process is performed. Therefore, the DMS device 11 performs the tuning process and the authentication process in parallel. It can be carried out. Thereby, the time until the tuning process and the authentication process in the DMS apparatus 11 are completed can be shortened. Therefore, the DMP device 12 transmits the selected program information included in the authentication information, or transmits the selected program information before the authentication process is performed, thereby completing the authentication process for the stream indicated by the program selection instruction. It can be received from the DMS device 11 earlier than when tuning processing is performed after receiving a program selection instruction transmitted later.

  In the reproduction processing apparatus according to the embodiment of the present invention, the stream acquisition apparatus and the reproduction processing apparatus transmit and receive information using IP packets. The storage unit 58 stores information indicating the correspondence between the port number of the IP packet and the program. The control unit 53 identifies the port number corresponding to the program to be reproduced based on the information indicating the correspondence acquired from the storage unit 58, and the selected program designation unit 59 sets the identified port number to the selected program information. And included in the authentication information to be transmitted to the stream acquisition device.

  With such a configuration, a program to be reproduced can be associated with the port number of the IP packet including the authentication information and transmitted to the DMS apparatus 11. Thereby, the DMP device 12 transmits the authentication information including the information of the program to be reproduced to the DMS device 11 without using the unique communication that needs to be determined in advance with the DMS device 11. be able to. In other words, the DMP device 12 can transmit authentication information including information on a program to be played back to the DMS device 11 only in accordance with the existing specification framework.

  In the reproduction processing apparatus according to the embodiment of the present invention, the control unit 53 causes the selected program designation unit 59 to convert the stream packet received by the stream acquisition apparatus into a packet that can be processed by the own reproduction processing apparatus. Information to be transmitted is included in the selected program information and transmitted to the stream acquisition device.

  With such a configuration, the DMP apparatus 12 can transmit information necessary for the conversion included in the selected program information during the authentication process or before the authentication process is performed. Packet conversion processing and authentication processing can be performed in parallel. As a result, the time required to execute the authentication process, the tuning process, and the packet conversion process is obtained, and the tuning process and the packet conversion process are performed after receiving the program selection instruction after the authentication process is completed. Compared with the case where processing is performed, it can be shortened. That is, the DMP device 12 shortens the time until the authentication processing, tuning processing, and packet conversion processing are completed by causing the DMS device 11 to perform tuning processing, packet conversion processing, and authentication processing in parallel. In addition, it is possible to shorten the time from when the program selection instruction is transmitted to the DMS apparatus 11 until the stream corresponding to the program specified by the program selection instruction is received from the DMS apparatus 11.

  In the playback processing device according to the embodiment of the present invention, the control unit 53 encrypts the stream packet received by the stream acquisition device into a packet that can be decrypted by the playback processing device. The reproduction-side public key for converting to the stream acquisition device is transmitted in the authentication process.

  With such a configuration, the DMP device 12 can receive the packet encrypted by the DMS device 11 using the reproduction-side public key transmitted by itself. Thereby, only the DMP device 12 can decrypt the encrypted packet. That is, the DMP device 12 can receive from the DMS device 11 a packet protected from unauthorized copying or tampering during transfer.

  In the reproduction processing apparatus according to the embodiment of the present invention, the selected program specifying unit 59 performs authentication processing with the stream acquisition apparatus in accordance with DTCP-IP.

  With such a configuration, the DMP device 12 satisfies the DTCP-IP specification, and thus can be connected to a DMS device or a DMP device that satisfies the specification. In addition, the DMP device 12 can be sold in a country or region that requires the specification to be satisfied.

  In the program processing system according to the embodiment of the present invention, the stream acquisition device acquires a stream. The reproduction processing device performs program reproduction processing based on the stream acquired by the stream acquisition device. The stream acquisition device and the playback processing device perform authentication processing by transmitting and receiving authentication information before transmitting and receiving information indicating the contents of the stream between the stream acquisition device and the playback processing device. After the authentication process is completed, the stream acquisition device controls the tuning unit for selectively receiving a stream based on the program selection instruction received from the reproduction processing device, so that the program designated by the program selection instruction is obtained. Information indicating the contents of the corresponding stream is transmitted to the reproduction processing apparatus. The reproduction processing apparatus includes the selected program information indicating the program to be selected in the authentication information and transmits it to the stream acquisition apparatus, or transmits the selected program information to the stream acquisition apparatus before the authentication process is performed. Then, when receiving the selected program information, the stream acquisition device causes the tuning unit to receive a stream corresponding to the program indicated by the selected program information regardless of whether or not the authentication process is completed.

  With this configuration, the DMS device 11 can receive selected program information indicating a program to be selected from the DMP device 12 during the authentication process or before the authentication process is performed. Processing can be performed in parallel. As a result, the time required to execute the tuning process and the authentication process is shortened as compared with the case where the tuning process is performed after receiving the program selection instruction after the authentication process is completed, that is, the serial process is performed. be able to. That is, the DMS device 11 performs the tuning process and the authentication process in parallel, thereby shortening the time until the tuning process and the authentication process are completed, and designates the program selection instruction after receiving the program selection instruction from the DMP device 12. It is possible to shorten the time until the stream corresponding to the broadcasted program is transmitted to the DMP device 12.

  In the program processing system according to the embodiment of the present invention, the stream acquisition device and the playback processing device transmit and receive information using IP packets. The stream acquisition device stores information indicating the correspondence between the port number of the IP packet and the program. Then, the reproduction processing apparatus includes the port number as the selected program information in the authentication information and transmits it to the stream acquisition apparatus.

  With such a configuration, the DMP apparatus 12 can transmit the program to be played back to the DMS apparatus 11 in association with the port number of the IP packet including the authentication information. Further, the DMS device 11 can specify the program requested by the DMP device 12 from the port number of the IP packet including the authentication information. As a result, the DMS device 11 and the DMP device 12 can transmit / receive the selected program information without using unique communication whose specifications need to be determined in advance. That is, the DMS device 11 and the DMP device 12 can transmit / receive the selected program information only in accordance with the framework of the existing specification.

  In the program processing system according to the embodiment of the present invention, the stream acquisition device converts the stream packet received by the tuning unit into a packet that can be processed by the playback processing device, and transmits the packet to the playback processing device. Then, the playback processing apparatus further includes information used for the conversion in the selected program information and transmits it to the stream acquisition apparatus.

  With this configuration, the DMS device 11 can receive the information necessary for the conversion included in the selected program information during the authentication process or before the authentication process is performed. The conversion process and the authentication process can be performed in parallel. As a result, the time required to execute the authentication process, the tuning process, and the packet conversion process is the same as the case where the tuning process is performed after the program selection instruction is received after the authentication process is completed, that is, the serial process is performed. Compared to this, it can be shortened. That is, the DMS device 11 shortens the time until the authentication processing, the tuning processing, and the packet conversion processing are completed by performing the tuning processing, the packet conversion processing, and the authentication processing in parallel. It is possible to shorten the time from when the program selection instruction is received until the stream corresponding to the program specified by the program selection instruction is transmitted to the DMP device 12.

  In the program processing system according to the embodiment of the present invention, the stream acquisition device encrypts the packet of the stream received by the tuning unit into a packet that can be decrypted by the playback processing device, and transmits the encrypted packet to the playback processing device. Then, the reproduction processing apparatus further transmits the reproduction side public key to the stream acquisition apparatus in the authentication process.

  As described above, the DMS device 11 transmits the packet encrypted using the reproduction-side public key received from the DMP device 12 to the DMP device 12. Thereby, only the DMP device 12 can decrypt the encrypted packet. That is, a packet transmitted from the DMS device 11 to the DMP device 12 is protected from unauthorized copying or alteration during transfer.

  Further, in the program processing system according to the embodiment of the present invention, the stream acquisition device, for the stream corresponding to the program indicated by the selected program information received by the tuning unit until the authentication process is completed, Is discarded without being transmitted to the reproduction processing apparatus.

  With such a configuration, it is possible to shorten the delay time required until the stream received by the tuning unit is transmitted to the DMP device 12. That is, the tuning process and the authentication process can be performed in parallel. For example, when the tuning process is completed earlier than the authentication process, the following problem occurs. Since the DMS device 11 cannot receive the program selection instruction from the DMP device 12 until the authentication process is completed, the DMS device 11 cannot promptly transmit the stream packet received by the tuning unit to the DMP device 12. If the DMS device 11 transmits a packet that could not be promptly transmitted to the DMP device 12 to the DMP device 12 after receiving the program selection instruction from the DMP device 12 after the completion of the authentication process, the delay time becomes long. In contrast, the DMS device 11 can shorten the delay time by discarding the packet received by the tuning unit until the authentication process is completed.

  In the program processing system according to the embodiment of the present invention, the stream acquisition device and the playback processing device perform authentication processing according to DTCP-IP.

  With such a configuration, the DMS device 11 and the DMP device 12 satisfy the DTCP-IP specification, and thus can be connected to a DMS device or a DMP device that satisfies the specification. In addition, the DMS device 11 and the DMP device 12 can be sold in a country or region that requires the specification to be satisfied.

  Further, in the stream acquisition device and the playback processing device according to the embodiment of the present invention, the CDS associates the port number with the tuning destination, channel, and transcode information. However, the present invention is not limited to this. For example, an address indicating a join destination of an IP multicast group may be associated with a port number in the CDS.

  For example, when acquiring a stream by IP multicast broadcast from a server corresponding to IPTV, the DMP device 12 refers to the CDS, specifies the port number corresponding to the IP multicast broadcast, and specifies the port number as the transmission destination. Is requested to the DMS device 11.

  The DMS device 11 can identify the IP multicast group subscription destination from the port number that received the AKE request from the DMP device 12. As a result, the DMS device 11 can perform the IP multicast broadcast group joining processing in parallel with the AKE processing with the DMP device 12.

  Further, the DMP device 12 may transmit the tune message by SOAP including the address indicating the join destination of the IP multicast group to the DMS device 11 before requesting the AKE. Also by this, since the DMS device 11 can specify the IP multicast group joining destination, the IP multicast broadcast group joining processing can be performed in parallel with the AKE processing with the DMP device 12.

  In the stream acquisition device according to the embodiment of the present invention, the packet deletion unit 40 discards the packet received before receiving the playback-side public key from the tuning control unit 33. However, the packet is stored in the buffer. You may keep it. When the packet deletion unit 40 receives the playback-side public key from the tuning control unit 33, the user selects whether to discard the packet held in the buffer or to perform encryption processing in order of old packets You may be able to do it.

  In addition, although the DMS device 11 and the DMP device 12 according to the embodiment of the present invention are separate devices, the present invention is not limited to this. For example, a device in which the DMS device 11 and the DMP device 12 are integrated may operate as the DMS device 11 in one aspect and operate as the DMP device 12 in another aspect.

  Further, although the DMS apparatus 11 according to the embodiment of the present invention specifies the channel and transcode information based on the port number of the port that has received the AKE request, the present invention is not limited to this. For example, when the DMS device 11 receives an AKE request from another device, the DMS device 11 may specify the channel and transcode information based on the port number of the transmission source of the packet including the AKE request. Also, for example, when the DMS device 11 receives an AKE request from another device, the DMS device 11 identifies a channel based on the port number of the transmission destination of the packet including the AKE request, and the port number of the transmission source of the packet The transcoding information may be specified based on the above.

  Further, although the stream acquisition device and the playback processing device according to the embodiment of the present invention are configured to perform stream reception processing in accordance with the MPEG2-TS standard, the present invention is not limited to this. It may be configured to perform stream reception processing according to another standard.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

10 Program Processing System 11 Digital Media Server (DMS) Device (Stream Acquisition Device)
12 Digital media playback (DMP) device (playback processing device)
13 Network 31 Antenna 32 Tuning Unit 33 Tuning Control Unit 34 Transcode Processing Unit 35 Server-side Authentication Processing Unit 36 Content Recording Unit 37 Cryptographic Processing Unit 38 Communication Unit 39 Server-Side Device Detection Unit 40 Packet Deletion Unit 41 Storage Unit 42 Selection Program Acceptance Unit 51 playback side device detection unit 52 operation receiving unit 53 control unit 54 playback side authentication processing unit 55 communication unit 56 decoding processing unit 57 video output unit 58 storage unit 59 selected program designation unit

Claims (24)

A stream acquisition device for receiving and processing a stream obtained by dividing information of one or more programs into a plurality of packets,
A communication unit capable of communicating with the reproduction processing device ;
A selected program receiving unit for performing an authentication process by sending and receiving authentication information through the communication section between said reproducing apparatus,
After completion of the authentication process, a tuning unit for selectively receiving the stream is caused to receive the stream corresponding to the program specified by the program selection instruction received from the reproduction processing device via the communication unit , A control unit for causing the communication unit to transmit information indicating the content of the stream received by the tuning unit to the reproduction processing device;
The selected program receiving unit receives the authentication information including selected program information indicating a program to be selected from the reproduction processing device via the communication unit , or receives the selected program information before the authentication process is performed. When receiving from the reproduction processing device via the communication unit , the selected program information is output to the control unit,
The program specified by the program selection instruction is the same as the program indicated by the selected program information,
When receiving the selected program information from the selected program receiving unit, the control unit receives the stream corresponding to the program indicated by the selected program information to the tuning unit regardless of whether or not the authentication process is completed. Let the stream acquisition device. The stream acquisition device and the playback processing device transmit and receive information using IP packets,
The destination or source port number of the IP packet is determined for each program,
The stream acquisition device further includes:
A storage unit for storing information indicating a correspondence relationship between destination or source port number and the program of the IP packet,
The selected program receiving unit, a destination or source port number of the IP packet including the authentication information, received from the reproducing apparatus as the selected program information via the communication unit, the port number received Output to the control unit,
When receiving the port number from the selected program receiving unit, the control unit causes the tuning unit to receive the stream corresponding to the port number based on information indicating the correspondence acquired from the storage unit. The stream acquisition apparatus according to claim 1. The stream acquisition device further includes:
A transcode processing unit for converting the packet of the stream received by the tuning unit into a packet that can be processed by the reproduction processing device;
The control unit causes the communication unit to transmit the packet converted by the transcode processing unit to the reproduction processing device,
The stream acquisition according to claim 1, wherein the selected program receiving unit receives the selected program information including information used for the conversion in the transcode processing unit from the reproduction processing device via the communication unit. apparatus. The stream acquisition device further includes:
An encryption processing unit for encrypting the packets of the stream received by the tuning unit into packets that can be decrypted by the reproduction processing device;
The control unit causes the communication unit to transmit the packet encrypted by the encryption processing unit to the reproduction processing device,
4. The stream acquisition device according to claim 1, wherein the selected program receiving unit receives information used for the encryption from the reproduction processing device via the communication unit in the authentication process. 5. The stream acquisition device further includes:
For the stream corresponding to the program indicated by the selected program information received by the tuning unit until the authentication process is completed, the information indicating the content of the stream is discarded without being transmitted to the reproduction processing device. The stream acquisition device according to any one of claims 1 to 4, further comprising a packet deletion unit for the purpose.   5. The encryption processing unit encrypts the packet of the stream received by the tuning unit into a packet that can be decrypted by the reproduction processing device according to DTCP-IP (Digital Transmission Content Protection-Internet Protocol). The stream acquisition device described in 1. The stream acquisition device according to any one of claims 1 to 6, wherein the selected program reception unit performs the authentication process with the reproduction processing device via the communication unit according to DTCP-IP. . A reproduction processing device for receiving a stream obtained by dividing information of one or a plurality of programs into a plurality of packets from a stream acquisition device, and performing reproduction processing of the program based on the stream,
A selected program designating unit for performing authentication processing by transmitting / receiving authentication information to / from the stream acquisition device;
A control unit for controlling the selected program designating unit,
The control unit causes the selected program specifying unit to include the selected program information indicating the stream to be selectively received by the stream acquisition device in the authentication information and transmit the information to the stream acquisition device, or the authentication process. The selected program information is transmitted to the stream acquisition device before
When the authentication processing is completed, the control unit transmits a program selection instruction indicating the stream to be transmitted to the stream acquisition device to the stream acquisition device ,
The reproduction processing apparatus , wherein the program specified by the program selection instruction is the same as the program indicated by the selected program information . The stream acquisition device and the playback processing device transmit and receive information using IP packets,
The destination or source port number of the IP packet is determined for each program,
The reproduction processing device further includes:
A storage unit for storing information indicating a correspondence between a transmission destination or a transmission source port number of the IP packet and a program;
The control unit specifies a port number corresponding to a program to be played based on the information indicating the correspondence acquired from the storage unit, and the specified port number is specified to the selected program specifying unit. The reproduction processing apparatus according to claim 8, wherein the selection information is included in the authentication information and transmitted to the stream acquisition apparatus.   The control unit includes, in the selected program information, information for converting the packet of the stream received by the stream acquisition device into a packet that can be processed by the playback processing device. The reproduction processing device according to claim 8 or 9, wherein the reproduction processing device is transmitted to the stream acquisition device.   The control unit sends information for encrypting the stream packet received by the stream acquisition device into a packet decodable by the playback processing device to the selected program designating unit in the authentication process. The reproduction | regeneration processing apparatus of any one of Claims 8-10 made to transmit to an acquisition apparatus.   The reproduction processing apparatus according to any one of claims 8 to 11, wherein the selected program designating unit performs the authentication process with the stream acquisition apparatus according to DTCP-IP. A program processing system for processing a stream obtained by dividing information of one or more programs into a plurality of packets,
A stream acquisition device for acquiring the stream;
A playback processing device for performing playback processing of a program based on the stream acquired by the stream acquisition device,
The stream acquisition device and the reproduction processing device perform authentication processing by transmitting / receiving authentication information before transmitting / receiving information indicating the content of the stream between the stream acquisition device and the reproduction processing device,
The stream acquisition device is designated by the program selection instruction by controlling a tuning unit for selectively receiving a stream on the basis of the program selection instruction received from the reproduction processing device after the authentication process is completed. Transmitting the information indicating the content of the stream corresponding to the broadcasted program to the reproduction processing device;
The reproduction processing device includes selected program information indicating a program to be selected in the authentication information and transmits the selected program information to the stream acquisition device, or transmits the selected program information to the stream acquisition device before the authentication processing is performed. Send
The program specified by the program selection instruction is the same as the program indicated by the selected program information, and the stream acquisition device receives the selected program information, regardless of whether the authentication process is completed or not. A program processing system for causing a tuning unit to receive the stream corresponding to a program indicated by the selected program information. The stream acquisition device and the playback processing device transmit and receive information using IP packets,
The destination or source port number of the IP packet is determined for each program,
The stream acquisition device stores information indicating a correspondence relationship between a transmission destination or a transmission source port number of the IP packet and the program;
The program processing system according to claim 13, wherein the reproduction processing device includes the port number as the selected program information in the authentication information and transmits the information to the stream acquisition device. The stream acquisition device converts the packet of the stream received by the tuning unit into a packet that can be processed by the playback processing device, and transmits the packet to the playback processing device.
The program processing system according to claim 13 or 14, wherein the reproduction processing device further includes information used for the conversion included in the selected program information and transmits the information to the stream acquisition device. The stream acquisition device encrypts the packet of the stream received by the tuning unit into a packet that can be decrypted by the playback processing device, and transmits the encrypted packet to the playback processing device.
The program processing system according to claim 13 or 15, wherein the reproduction processing device further transmits information used for the encryption to the stream acquisition device in the authentication processing.   For the stream corresponding to the program indicated by the selected program information received by the tuning unit until the authentication processing is completed, the stream acquisition device transmits information indicating the content of the stream to the reproduction processing device. The program processing system according to any one of claims 13 to 16, which is discarded without being transmitted.   18. The program processing system according to claim 13, wherein the stream acquisition device and the playback processing device perform the authentication processing according to DTCP-IP. A stream processing method in a stream acquisition device for receiving and processing a stream obtained by dividing information of one or more programs into a plurality of packets,
Performing authentication processing by transmitting / receiving authentication information to / from the playback processing device;
Receiving the stream corresponding to the program specified by the program selection instruction received from the reproduction processing device after the authentication processing is completed;
Transmitting information indicating the content of the received stream to the reproduction processing device;
When the authentication information including selected program information indicating a program to be selected is received from the reproduction processing device, or when the selected program information is received from the reproduction processing device before the authentication processing is performed, the authentication processing is performed. regardless of whether complete, look including a step of receiving the stream corresponding to the program indicated by the selected program information,
The stream processing method , wherein the program specified by the program selection instruction is the same as the program indicated by the selected program information . A stream processing method in a reproduction processing apparatus for receiving a stream obtained by dividing information of one or more programs into a plurality of packets from a stream acquisition apparatus and performing reproduction processing of the program based on the stream,
Performing authentication processing by sending and receiving authentication information to and from the stream acquisition device;
The selected program information indicating the stream to be selectively received by the stream acquisition device is included in the authentication information and transmitted to the stream acquisition device, or the selected program information is transmitted before the authentication processing is performed. Transmitting to the stream acquisition device;
When the authentication process is completed, the program selection instruction indicating the stream to be transmitted the stream acquisition device to self, it viewed including the steps of transmitting to the stream acquisition device,
The stream processing method , wherein the program specified by the program selection instruction is the same as the program indicated by the selected program information . A stream processing method in a program processing system for processing a stream obtained by dividing information of one or more programs into a plurality of packets,
The stream acquisition device and the playback processing device perform authentication processing by transmitting and receiving authentication information before transmitting and receiving information indicating the contents of the stream between the stream acquisition device and the playback processing device;
Designated by the program selection instruction by controlling a tuning unit for selectively receiving a stream based on the program selection instruction received from the reproduction processing apparatus after the authentication processing is completed by the stream acquisition apparatus Transmitting information indicating the content of the stream corresponding to the programmed program to the reproduction processing device;
The reproduction processing device includes selected program information indicating a program to be selected in the authentication information and transmits it to the stream acquisition device, or sends the selected program information to the stream acquisition device before the authentication processing is performed. Including the step of transmitting,
The program specified by the program selection instruction is the same as the program indicated by the selected program information,
The stream processing method further includes:
The stream acquisition device comprises upon receiving the selected program information, regardless of whether or not the authentication process is completed, the steps for receiving the stream corresponding to the program indicated by the selected program information to the tuning section , Stream processing method. A stream processing program used in a stream acquisition device for receiving and processing a stream obtained by dividing information of one or more programs into a plurality of packets,
Performing authentication processing by transmitting / receiving authentication information to / from the playback processing device;
Receiving the stream corresponding to the program specified by the program selection instruction received from the reproduction processing device in a tuning unit for selectively receiving the stream after the authentication processing is completed;
Transmitting information indicating the content of the received stream to the reproduction processing device;
When the authentication information including selected program information indicating a program to be selected is received from the reproduction processing device, or when the selected program information is received from the reproduction processing device before the authentication processing is performed, the authentication processing is performed. A program for executing the step of receiving the stream corresponding to the program indicated by the selected program information regardless of whether or not it is completed ,
The stream processing program , wherein the program specified by the program selection instruction is the same as the program indicated by the selected program information . A stream processing program used in a reproduction processing apparatus for receiving a stream obtained by dividing information on one or more programs into a plurality of packets from a stream acquisition apparatus and performing program reproduction processing based on the stream, In addition,
Performing authentication processing by sending and receiving authentication information to and from the stream acquisition device;
The selected program information indicating the stream to be selectively received by the stream acquisition device is included in the authentication information and transmitted to the stream acquisition device, or the selected program information is transmitted before the authentication processing is performed. Transmitting to the stream acquisition device;
When the authentication process is completed, the stream acquisition device is configured to execute a program selection instruction indicating the stream to be transmitted to the stream acquisition device .
The stream processing program , wherein the program specified by the program selection instruction is the same as the program indicated by the selected program information . A stream processing program used in a program processing system for processing a stream obtained by dividing information of one or a plurality of programs into a plurality of packets,
The stream acquisition device and the playback processing device perform authentication processing by transmitting and receiving authentication information before transmitting and receiving information indicating the contents of the stream between the stream acquisition device and the playback processing device;
Designated by the program selection instruction by controlling a tuning unit for selectively receiving a stream based on the program selection instruction received from the reproduction processing apparatus after the authentication processing is completed by the stream acquisition apparatus Transmitting information indicating the content of the stream corresponding to the programmed program to the reproduction processing device;
The reproduction processing device includes selected program information indicating a program to be selected in the authentication information and transmits it to the stream acquisition device, or sends the selected program information to the stream acquisition device before the authentication processing is performed. A program for executing the transmitting step ,
The program specified by the program selection instruction is the same as the program indicated by the selected program information,
In addition,
The stream acquisition device receives the selected program information, executes the steps to receive the stream of the authentication process irrespective of whether or not completed, corresponding to the program indicated by the selected program information to the tuning section A stream processing program for

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