WO2013128696A1 - デジタル放送方法 - Google Patents
デジタル放送方法 Download PDFInfo
- Publication number
- WO2013128696A1 WO2013128696A1 PCT/JP2012/074196 JP2012074196W WO2013128696A1 WO 2013128696 A1 WO2013128696 A1 WO 2013128696A1 JP 2012074196 W JP2012074196 W JP 2012074196W WO 2013128696 A1 WO2013128696 A1 WO 2013128696A1
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- WIPO (PCT)
- Prior art keywords
- mpeg
- packet
- tts
- packets
- group
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Classifications
-
- 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
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/70—Media network packetisation
-
- 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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
Definitions
- the present invention relates to a digital broadcasting method using a communication line.
- the MPEG-2 TTS data stream is converted into RTP (Real-time Transport Protocol) packets with headers attached to a group of a predetermined number of MPEG-2 TTS packets and transmitted from the transmission side to the communication line.
- RTP Real-time Transport Protocol
- null packets were deleted on the transmission side, and non-null MPEG-2 TTS packets were packed up to the upper limit of RTP packets. For this reason, variations occur in the timing of RTP packetization on the transmission side, and the reception side needs to secure a buffer to absorb variations in arrival times of RTP packets. Further, there is a problem that the delay time on the receiving side increases.
- the present invention has been made in order to solve the above-described problems.
- the object of the present invention is to eliminate the need for an extra buffer on the receiving side, reduce the delay time on the receiving side, and average the rate of data transfer on the communication line. It is possible to obtain a digital broadcasting method capable of substantially reducing the image quality.
- the TTS processing unit attaches a time stamp to each packet of the MPEG-2 TS and converts it into MPEG-2 TTS, and the group configuration unit has a predetermined number of the MPEG-2 TTS.
- a step of collecting packets to form a group a step of a null packet removal unit deleting a null packet from the group, and a transmission unit of the MPEG-2 TTS packet in the group from which the null packet has been deleted. Pre-packed, converted into RTP packets, and transmitted to the communication line.
- the delay time on the receiving side can be shortened, and the average rate of data transfer on the communication line can be substantially reduced.
- FIG. 10 is a flowchart of a digital broadcasting method according to Comparative Example 1. It is a figure which shows the example of RTP packetization by the system of the comparative example 2.
- FIG. 10 is a flowchart of a digital broadcasting method according to Comparative Example 2. It is the figure which compared the example of RTP packetization by each system of Embodiment of this invention and Comparative Examples 1 and 2.
- FIG. 10 is a flowchart of a digital broadcasting method according to Comparative Example 1. It is the figure which compared the example of RTP packetization by each system of Embodiment of this invention and Comparative Examples 1 and 2.
- FIG. 1 is a diagram showing a digital broadcasting system according to an embodiment of the present invention. This system is divided into a transmitter 1 and a receiver 2.
- the receiver 2 receives the RTP packet transmitted from the transmitter 1 via the communication line 3 such as the Internet.
- the transmitter 1 includes a video / audio encoder (compression / multiplexing device) 4, a TTS processing unit 5, a group configuration unit 6, a Null packet removal unit 7, and a transmission unit 8.
- FIG. 2 is a diagram showing an example of RTP packetization according to the system of the embodiment of the present invention.
- FIG. 3 is a flowchart of the digital broadcasting method according to the embodiment of the present invention. The digital broadcasting method of this embodiment will be described with reference to these drawings.
- the video / audio encoder (compression / multiplexing device) 4 outputs MPEG-2 TS used for normal broadcasting.
- MPEG-2 TS a Null packet not including a video or the like is inserted in order to adjust the reproduction timing when the original video is encoded by a broadcasting station or the like.
- the TTS processing unit 5 attaches a time stamp to each MPEG-2 TS packet and converts it to MPEG-2 TTS.
- the MPEG-2 TS is input to the TTS processing unit 5 (step S1), and the time information at the time of encoding received from the video / audio encoder (compression / multiplexing device) 4 is used as a time stamp for the MPEG-2 TS. (Step S2).
- the group configuration unit 6 adds an MPEG-2 TTS packet to the group (step S3).
- the group construction unit 6 repeats steps S1 to S3 until the predetermined number n of MPEG-2 TTS packets is reached (step S4).
- the group configuration unit 6 passes a group of n packets to the null packet removal unit 7.
- the transmission unit 8 prepends the MPEG-2 TTS packet in the group from which the Null packet has been deleted, adds a header, converts the packet into an RTP packet, and transmits the packet to the communication line 3 (step S10).
- FIG. 4 is a diagram illustrating an example of RTP packetization according to the method of the first comparative example.
- FIG. 5 is a flowchart of the digital broadcasting method according to Comparative Example 1.
- MPEG-2 TS packets are packed into one RTP packet up to the upper limit without distinguishing Null packets (steps S11 to S14).
- steps S11 to S14 there is no variation in RTP packetization timing, and in the case of MPEG-2 TS CBR transmission, the reproduction timing can be reproduced on the receiving side in an environment that is not affected by jitter or packet loss.
- FIG. 6 is a diagram showing an example of RTP packetization by the method of Comparative Example 2.
- FIG. 7 is a flowchart of the digital broadcasting method according to Comparative Example 2.
- a time stamp is attached to each packet of MPEG-2 TS, converted to MPEG-2 TTS, and transmitted to communication line 3 (steps S15 to S22).
- the receiver 2 can rearrange the packets at the correct timing and order. That is, the receiver 2 can accurately reproduce the reproduction timing and order by the time stamp in the MPEG-2 TTS. Therefore, since the transmitter 1 can delete the null packet, the average rate of data transfer on the communication line 3 can be substantially reduced.
- a predetermined number of packets including Null packets are collected to form a group, and Null packets are deleted from the group and the remaining MPEG-2 TTS packets are left-justified. Convert to RTP packet.
- RTP packets are generated at regular intervals, no extra buffer is required on the receiving side, and the delay time on the receiving side can be shortened. Even if there is no non-null MPEG-2 TTS packet in one group, the RTP packet is generated only in that group. For this reason, the length of the entire RTP packet is not constant, but there is no problem in the specification.
- FIG. 8 is a diagram comparing RTP packetization examples according to the respective modes of the embodiment of the present invention and Comparative Examples 1 and 2.
- Comparative Example 1 the transfer load is large because the NTP packet is included in the RTP packet.
- Comparative Example 2 the Null packet is deleted to reduce the transfer load, but the RTP packetization timing varies. Therefore, since the arrival interval of the RTP packet is not constant on the receiving side, an extra buffer is required and the delay time increases.
- the transfer load is at the same level as in Comparative Example 2, and the timing of RTP packetization is at the same level as in Comparative Example 1. Therefore, in this embodiment, no extra buffer is required on the receiving side, the delay time on the receiving side can be shortened, and the average rate of data transfer on the communication line can be substantially reduced.
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Communication Control (AREA)
- Television Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
2 受信機
3 通信回線
5 TTS化処理部
6 グループ構成部
7 Nullパケット除去部
8 送信部
Claims (1)
- TTS化処理部がMPEG-2 TS(Transport Stream)の各パケットにタイムスタンプを付けてMPEG-2 TTS(Time-stamped Transport Stream)に変換する工程と、
グループ構成部が前記MPEG-2 TTSの所定数のパケットを集めてグループを構成する工程と、
Nullパケット除去部が前記グループからNullパケットを削除する工程と、
送信部が、前記Nullパケットが削除された前記グループ内の前記MPEG-2 TTSのパケットを前詰めしてRTP(Real-time Transport Protocol)パケットに変換して通信回線に送信する工程とを備えることを特徴とするデジタル放送方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/379,246 US9357276B2 (en) | 2012-03-01 | 2012-09-21 | Digital broadcast method |
BR112014021149-3A BR112014021149B1 (pt) | 2012-03-01 | 2012-09-21 | Digital broadcasting method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012045059A JP5310892B2 (ja) | 2012-03-01 | 2012-03-01 | デジタル放送方法 |
JP2012-045059 | 2012-03-01 |
Publications (1)
Publication Number | Publication Date |
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WO2013128696A1 true WO2013128696A1 (ja) | 2013-09-06 |
Family
ID=49081923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2012/074196 WO2013128696A1 (ja) | 2012-03-01 | 2012-09-21 | デジタル放送方法 |
Country Status (4)
Country | Link |
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US (1) | US9357276B2 (ja) |
JP (1) | JP5310892B2 (ja) |
BR (1) | BR112014021149B1 (ja) |
WO (1) | WO2013128696A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2015008983A1 (en) * | 2013-07-14 | 2015-01-22 | Lg Electronics Inc. | Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals |
US9906754B2 (en) * | 2013-12-30 | 2018-02-27 | Maxlinear, Inc. | Channel bonding for ultra-high definition video background |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010041494A (ja) * | 2008-08-06 | 2010-02-18 | Sumitomo Electric Ind Ltd | ネットワーク端末 |
JP2010045469A (ja) * | 2008-08-11 | 2010-02-25 | Kddi Corp | 放送信号転送装置および放送信号再送信システム |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7567509B2 (en) * | 2002-09-13 | 2009-07-28 | Dialogic Corporation | Methods and systems for jitter minimization in streaming media |
JP2007104085A (ja) * | 2005-09-30 | 2007-04-19 | Toshiba Corp | 通信回線を用いるデジタル放送方法およびその装置 |
EP2003844A1 (en) * | 2007-06-13 | 2008-12-17 | Thomson Licensing | System and method for transport of a constant bit rate stream |
-
2012
- 2012-03-01 JP JP2012045059A patent/JP5310892B2/ja active Active
- 2012-09-21 BR BR112014021149-3A patent/BR112014021149B1/pt active IP Right Grant
- 2012-09-21 WO PCT/JP2012/074196 patent/WO2013128696A1/ja active Application Filing
- 2012-09-21 US US14/379,246 patent/US9357276B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010041494A (ja) * | 2008-08-06 | 2010-02-18 | Sumitomo Electric Ind Ltd | ネットワーク端末 |
JP2010045469A (ja) * | 2008-08-11 | 2010-02-25 | Kddi Corp | 放送信号転送装置および放送信号再送信システム |
Also Published As
Publication number | Publication date |
---|---|
JP5310892B2 (ja) | 2013-10-09 |
US9357276B2 (en) | 2016-05-31 |
JP2013183248A (ja) | 2013-09-12 |
BR112014021149A2 (pt) | 2017-05-09 |
US20150163567A1 (en) | 2015-06-11 |
BR112014021149B1 (pt) | 2018-01-30 |
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