JP6753500B2 - 受信機器、および復号・提示方法 - Google Patents
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4343—Extraction or processing of packetized elementary streams [PES]
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
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- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4341—Demultiplexing of audio and video streams
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4381—Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/61—Network physical structure; Signal processing
- H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
- H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/64322—IP
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Circuits Of Receivers In General (AREA)
Description
本発明の第1の実施形態の送受信システムについて、図面を参照して説明する。図1は、本発明の第1の実施形態の送受信システムの構成例を示すブロック図である。図1に示すように、本発明の第1の実施形態の送受信システムは、情報を送信する送信機器100と、情報を受信する受信機器200とを含む。なお、送信機器100および受信機器200は、例えば、プログラム制御に従って処理を実行する、CPU(Central Processing Unit)等の単数または複数の回路が搭載されたコンピュータによって実現されてもよい。具体的には、例えば、送信機器100および受信機器200に、以下に述べる各動作を実現させるためのソフトウェアが搭載される。そして、送信機器100および受信機器200は、当該ソフトウェアのプログラム制御に従って処理を実行することにより、以下に述べる各動作を実現するように構成されていてもよい。
なお、MPU_Presentation_timeは、MPU_presentation_time情報によってNTPタイムスタンプ形式で示されている時刻である。MPU_decoding_time_offsetは、最初に復号されるアクセスユニットの復号時刻と、最初に提示されるアクセスユニットの提示時刻との差分値である。pts_offsetは、同じMPU内の提示順序において、直前のアクセスユニットの提示時刻と現在のアクセスユニットの提示時刻との差分値である。timescaleは、これらの時刻の単位を示す値である。kはこのMPUにおけるアクセスユニットの数である。
なお、dts_pts_offset(n)は、MPUにおけるn番目のアクセスユニットの復号時刻と提示時刻との差分値である。
次に、本発明の第2の実施形態の送受信システムについて説明する。以上に述べた第1の実施形態の送受信システムでは、MMTPパケットを処理する順序を、packet_counter情報が示す値に基づいて入れ替える。それに対して、本発明の第2の実施形態の送受信システムでは、MPUを処理する順序をmpu_sequence_number情報が示す値に基づいて入れ替える。なお、送信機器100が生成するMMTPペイロードには、mpu_sequence_number情報が格納される。mpu_sequence_number情報は、同一のアセット毎に、各MPUを他のMPUから識別するように付されたシーケンス番号であるmpu_sequence_numberを示す情報である。本実施形態において、mpu_sequence_number情報は、順序情報に相当する。
次に、本発明の第3の実施形態の復号装置20について、図面を参照して説明する。図15は、本発明の第3の実施形態の復号装置20の構成例を示すブロック図である。図15に示すように、本発明の第3の実施形態の復号装置20は、復号部21および復号順序決定部22を含む。
20 復号装置
21 復号部
22 復号順序決定部
200 受信機器
300、500 アンテナ
400 通信回線
600a、600b マルチメディア情報
Claims (2)
- 送信機器から送信されたパケットを復号する復号手段を備えた受信機器であって、
パケットによって、アクセスユニットを含むMPUが送信され、
パケットに含まれる、世界時に協定世界時を近づけるための調整である閏秒の追加または閏秒の削除が行われることを示す調整情報に基づいて、アクセスユニットの復号・提示を行い、
パケットは、前記MPUの処理順序に関する順序情報とアクセスユニットが復号・提示される時刻を示すMPU_presentation_time情報とを含み、
前記受信機器は、
前記調整情報によって前記閏秒の追加または閏秒の削除が行われることが示されており、かつ、所定の期間内である場合に、前記MPU_presentation_time情報が示す時刻に関わらず、前記順序情報に基づいてアクセスユニットを復号・提示するようにアクセスユニットを復号・提示する順序を決定し、
前記調整情報によって前記閏秒の追加または閏秒の削除が行われることが示されていない場合、または前記調整情報によって前記閏秒の追加または閏秒の削除が行われることが示されているが前記所定の期間外の場合に、前記MPU_presentation_time情報が示す時刻に基づいてアクセスユニットを復号・提示するようにアクセスユニットを復号・提示する順序を決定し、
決定された前記順序に基づいて、アクセスユニットを復号・提示する
ことを特徴とする受信機器。 - 送信機器から送信されたパケットを復号する復号ステップを含む復号・提示方法であって、
パケットによって、アクセスユニットを含むMPUが送信され、
パケットに含まれる、世界時に協定世界時を近づけるための調整である閏秒の追加または閏秒の削除が行われることを示す調整情報に基づいて、アクセスユニットの復号・提示を行い、
パケットは、前記MPUの処理順序に関する順序情報とアクセスユニットが復号・提示される時刻を示すMPU_presentation_time情報とを含み、
前記調整情報によって前記閏秒の追加または閏秒の削除が行われることが示されており、かつ、所定の期間内である場合に、前記MPU_presentation_time情報が示す時刻に関わらず、前記順序情報に基づいてアクセスユニットを復号・提示するようにアクセスユニットを復号・提示する順序を決定し、
前記調整情報によって前記閏秒の追加または閏秒の削除が行われることが示されていない場合、または前記調整情報によって前記閏秒の追加または閏秒の削除が行われることが示されているが前記所定の期間外の場合に、前記MPU_presentation_time情報が示す時刻に基づいてアクセスユニットを復号・提示するようにアクセスユニットを復号・提示する順序を決定し、
決定された前記順序に基づいて、アクセスユニットを復号・提示する
ことを特徴とする復号・提示方法。
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JP2015040480 | 2015-03-02 | ||
JP2015040480 | 2015-03-02 |
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JP2017237042A Active JP6593423B2 (ja) | 2015-03-02 | 2017-12-11 | 受信機器、および復号・提示方法 |
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US (2) | US10631037B2 (ja) |
JP (3) | JP6489203B2 (ja) |
KR (3) | KR102137350B1 (ja) |
MX (1) | MX371467B (ja) |
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JP6489203B2 (ja) | 2015-03-02 | 2019-03-27 | 日本電気株式会社 | 受信機器、および復号・提示方法 |
JP6264501B2 (ja) | 2015-03-02 | 2018-01-24 | 日本電気株式会社 | 復号装置、復号方法、および復号用プログラム |
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