WO2006033404A1 - 無線マルチメディア通信方法 - Google Patents
無線マルチメディア通信方法 Download PDFInfo
- Publication number
- WO2006033404A1 WO2006033404A1 PCT/JP2005/017508 JP2005017508W WO2006033404A1 WO 2006033404 A1 WO2006033404 A1 WO 2006033404A1 JP 2005017508 W JP2005017508 W JP 2005017508W WO 2006033404 A1 WO2006033404 A1 WO 2006033404A1
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- WIPO (PCT)
- Prior art keywords
- layer
- transmission rate
- coding scheme
- hierarchical
- communication method
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
- H04N19/115—Selection of the code volume for a coding unit prior to coding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/164—Feedback from the receiver or from the transmission channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/187—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being a scalable video layer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
- H04N19/34—Scalability techniques involving progressive bit-plane based encoding of the enhancement layer, e.g. fine granular scalability [FGS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
- H04N19/36—Scalability techniques involving formatting the layers as a function of picture distortion after decoding, e.g. signal-to-noise [SNR] scalability
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2604—Multiresolution systems
Definitions
- the present invention particularly relates to a wireless multimedia communication method using multi-antenna orthogonal frequency division multiplexing (OFDM).
- OFDM orthogonal frequency division multiplexing
- MIMO-OFDM wireless transmission technology that combines multi-antenna input / output (MIMO) and orthogonal frequency division multiplexing (OFDM) has attracted widespread attention.
- MIMO combining OFDM and OFDM—OFDM technology has the advantages of both MIMO and OFDM.
- MIMO-OFDM technology can decompose frequency-selective MIMO fading channels into parallel flat fading channel groups by OFDM modulation and improve system capacity using MIMO.
- Suitable for multimedia work such as high audio and video.
- the video stream bit rate must correspond to the channel transmission bit rate.
- the physical layer and the media access control (MAC) layer have complex noferers and error corrections that make the wireless channel consistent and reliable, like the wired channel. There is a problem that this mechanism is necessary.
- FEC forward error correction
- ARQ automatic repeat request
- the object of the present invention is to improve the transmission quality of wireless video by using physical layer channel state information (CSI) in the video application layer, unlike the conventional case where the layers are independent. It is to provide a wireless multimedia communication method that can be used.
- CSI physical layer channel state information
- the wireless multimedia communication method of the present invention includes a step of hierarchically encoding a multimedia video stream, dividing the multimedia video stream into a basic layer and an enhancement layer based on a specific hierarchical encoding method, and an application layer Then, based on the current channel transmission rate information acquired from the physical layer, a step of determining whether or not the maximum transmission rate is larger than the current channel transmission rate when transmitting in the physical layer; and If the maximum transmission rate is greater than the current channel transmission rate, the specific hierarchical code scheme is the first hierarchical code scheme. In the case of a scheme, transmission starts from the base layer, and the current channel transmission rate of the video stream.
- the basic transmission layer and the enhancement layer can be accommodated simultaneously if the maximum transmission rate can accommodate the basic layer and the enhancement layer. Transmitting the layer and the enhancement layer, and transmitting only the base layer when the maximum transmission rate cannot accommodate the base layer and the enhancement layer at the same time.
- the transmission quality of wireless video can be improved by using physical layer channel state information in the video application layer, unlike the conventional case where the layers are independent.
- FIG. 1 is a block diagram showing a configuration of a MIMO OFDM wireless multimedia communication system according to an embodiment of the present invention.
- FIG. 2 is a flowchart of a cross-layer joint method according to an embodiment of the present invention.
- the idea of the present invention is that the transmission bit rate is determined using channel information acquired by feedback on the transmission side, and the embodiment of the present invention will be described below in combination with FIG. 1 and FIG. I will explain it.
- Step 1 the multimedia bitstream is hierarchically encoded on the transmission side (S21).
- the video application layer divides the bit stream into a basic layer and an enhancement layer using a hierarchical code method such as a signal-to-noise ratio, space, time, and fine granularity.
- a video sequence is encoded into a plurality of bit streams (layers), and importance and bit rate of each layer are variable.
- the video reception quality is determined by the number of basic layers and enhancement layers received. The most important is the base layer, which contains coarse grain information.
- the enhancement layer contains extension information that can be added to the base layer information. You can. The further the base layer force is, the lower the relative importance of the enhancement layer.
- the base layer is independent and can be decoded regardless of whether or not the enhancement layer is acquired.
- the enhancement layer cannot be decoded without the base layer and the previous enhancement layer information.
- the video bitstream is encoded at multiple bit rates instead of a single bit rate.
- Hierarchical code is used at the source as an effective method of suppressing code errors.
- Hierarchical coding Scalability Coding
- SN R Scalability Coding signal-to-noise ratio hierarchical coding
- temporal hierarchical coding temporal hierarchical coding
- spatial hierarchical coding spatial hierarchical coding
- fine granularity hierarchical (FGS) coding fine granularity hierarchical
- the signal-to-noise ratio of the transmitted video bitstream quantizes the coefficient measure through proportionality. This is also called SNR Scalable because the PSNR (Peak Signal to Noise Ratio) of the original video and the quantized video differ depending on the different quantization accuracy.
- the base layer is obtained by applying a coarse quantizer to the original image or transform area.
- the enhancement layer includes the quantization difference value between the original image and the image reproduced from the original image, and uses a more precise quantizer to obtain better quality than the basic layer.
- different frame rates can be used for different content layers in the time hierarchy code.
- the base layer performs coding at a low frame rate
- the enhancement layer performs coding at a high frame rate in order to obtain high video quality.
- the base layer performs code analysis at a low analysis rate
- the enhancement layer performs code analysis at a high analysis rate. Since the enhancement layer uses small quantization parameters, the quality is higher than that of the base layer.
- the above-described hierarchical code ⁇ generates a bitstream having several slight layer strengths, such as having a few enhancement layers after the base layer.
- this type of encoder performs better than an encoder without hierarchies, it only provides coarse granularity and improves quality only when the symbol rate increases with a large discrete width.
- the symbol rate and quality Increases in small increments.
- the bitstream is an inset code that continuously improves video quality through each additional bit.
- H.263 + provides SNR, space, and time layer sign options. If the SNR hierarchy method is selected, the base layer is also configured with I-frame and P-frame power. Because of the SNR hierarchical code method, the enhancement layer is composed of different information between the original image and the quantized image including the I frame or P frame. In H.263 +, the enhancement layer information is encoded in the EI frame or EP frame corresponding to the I frame or P frame. Therefore, when transmitting an extended image, the base layer (I frame or P frame) and the corresponding extended layer (EI frame or EP frame) are included.
- step 2 the video bitstream is transmitted by the MIMO-OFDM system, and is recovered by channel transmission.
- FIG. 1 is a diagram showing a MIMO-OFDM system having N transmit antennas and N receive antennas.
- a video stream bitstream in which an information bitstream is video-coded is multiplexed, channel coded, interleaved, modulated, N-point inverse discrete Fourier transform (IDFT), cyclic
- Sent via prefix (CP) insertion On the receiving side, the received signal-to-noise ratio of each antenna (usually assuming that the received signal-to-noise ratio of each antenna is the same) is calculated using the training sequence (S22). This reflects the channel state information and is fed back to the transmitting side (S23).
- step 3 a cross-layer joint is set.
- the physical layer changes the transmission rate over time according to the current SNR estimated by the receiver (S24).
- This includes variable rate quadrature amplitude modulation (MQAM), multi-phase PSK (MPSK), and other convolutional codes, turbo codes, low density parity codes (LDPC), etc. This can be realized with the sign key method.
- MQAM variable rate quadrature amplitude modulation
- MPSK multi-phase PSK
- LDPC low density parity codes
- MIMO algorithm To restore the transmitted symbol The video bitstream is restored after the key, dingtery, and decoding, and finally the information bits are restored using the video decoder.
- the maximum transmission rate R of the transmission side physical layer is determined according to the acquired SNR information and the bit error rate required by the system (S24). For example, MPSK modulation is max
- the rate is adjusted by the formula.
- the application layer Based on the bit rate information R in the current channel acquired in the physical layer, the application layer uses the current channel ch max when the physical layer transmits one frame.
- the base layer power is also transmitted, and the bits are increased until immediately after the total bit rate of the video stream falls below R in the enhancement layer (S26).
- the cross-layer joint setting method of the present invention is a mono-antenna OFDM wireless multimedia communication system and a multi-user, mono / multi-antenna OFDM wireless multi- It can also be applied to a multimedia communication system.
- the wireless multimedia communication method according to the present invention is particularly suitable for use in multi-antenna orthogonal frequency division multiplexing.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Quality & Reliability (AREA)
- Radio Transmission System (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNA2005800322907A CN101027911A (zh) | 2004-09-24 | 2005-09-22 | 无线多媒体通信方法 |
US11/575,826 US20070274381A1 (en) | 2004-09-24 | 2005-09-22 | Wireless Multimedia Communication Method |
JP2006536421A JPWO2006033404A1 (ja) | 2004-09-24 | 2005-09-22 | 無線マルチメディア通信方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200410011879.6 | 2004-09-24 | ||
CNA2004100118796A CN1753493A (zh) | 2004-09-24 | 2004-09-24 | 无线多媒体通信系统的跨层联合方法 |
Publications (1)
Publication Number | Publication Date |
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WO2006033404A1 true WO2006033404A1 (ja) | 2006-03-30 |
Family
ID=36090158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/017508 WO2006033404A1 (ja) | 2004-09-24 | 2005-09-22 | 無線マルチメディア通信方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070274381A1 (ja) |
JP (1) | JPWO2006033404A1 (ja) |
CN (2) | CN1753493A (ja) |
WO (1) | WO2006033404A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009055228A (ja) * | 2007-08-24 | 2009-03-12 | Sony Corp | 無線通信システム、無線通信装置及び無線通信方法 |
KR101331259B1 (ko) | 2012-03-20 | 2013-11-20 | 고려대학교 산학협력단 | 데이터 전송 방법 및 장치, 그리고 데이터 수신 방법 |
CN103945246A (zh) * | 2013-01-18 | 2014-07-23 | 北京大学 | 视频传输方法和装置 |
JP2014525162A (ja) * | 2011-12-29 | 2014-09-25 | 北京大学 | 動画伝送、受信方法および装置 |
Families Citing this family (20)
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---|---|---|---|---|
JP2005191933A (ja) * | 2003-12-25 | 2005-07-14 | Funai Electric Co Ltd | 送信装置、送受信システム |
KR100770849B1 (ko) * | 2006-02-17 | 2007-10-26 | 삼성전자주식회사 | 무선 페이딩 환경에서의 압축된 비디오 정합 장치 및 방법 |
CN101026604B (zh) * | 2006-02-23 | 2010-12-01 | 华为技术有限公司 | 正交频分复用系统中的信噪比反馈方法以及装置和系统 |
KR100758230B1 (ko) * | 2006-09-19 | 2007-09-12 | 연세대학교 산학협력단 | 무선자원 관리 장치 및 방법 |
FR2917262A1 (fr) * | 2007-06-05 | 2008-12-12 | Thomson Licensing Sas | Dispositif et procede de codage d'un contenu video sous la forme d'un flux scalable. |
US20100017530A1 (en) * | 2008-06-23 | 2010-01-21 | Hitachi, Ltd. | Priority-Based Physical Layer Transmission Rate Control For Video Streaming Over Wireless Networks |
US9083986B2 (en) * | 2009-05-01 | 2015-07-14 | Broadcom Corporation | Method and system for adaptive rate video compression and transmission |
EP2257073A1 (en) * | 2009-05-25 | 2010-12-01 | Canon Kabushiki Kaisha | Method and device for transmitting video data |
EP2487901A4 (en) * | 2009-10-08 | 2014-01-29 | Lg Electronics Inc | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING BROADCAST SIGNALS |
WO2011097755A1 (zh) * | 2010-02-11 | 2011-08-18 | 上海贝尔股份有限公司 | 基于svc的e-mbms流传输方法和设备 |
CN101917625A (zh) * | 2010-06-03 | 2010-12-15 | 北京邮电大学 | 一种基于联合信源-网络编码的可分级视频流传输方法 |
CN102761781B (zh) * | 2011-04-26 | 2015-08-12 | 北京大学 | 视频传输的方法、装置及系统 |
CN102170331B (zh) * | 2011-05-09 | 2016-06-15 | 中兴通讯股份有限公司 | 一种通用通信通道(gcc)速率调整的方法和装置 |
CN102970524B (zh) * | 2011-09-01 | 2016-06-22 | 华为技术有限公司 | 无线网络中视频传输方法、设备及系统 |
CN102595143B (zh) * | 2012-03-19 | 2014-01-29 | 中国科学院声学研究所 | 一种无线视频传输方法 |
CN103428484B (zh) * | 2012-05-21 | 2016-11-23 | 华为技术有限公司 | 一种传输方法及装置 |
KR20140122202A (ko) * | 2013-04-05 | 2014-10-17 | 삼성전자주식회사 | 계층 식별자 확장에 따른 비디오 스트림 부호화 방법 및 그 장치, 계층 식별자 확장에 따른 따른 비디오 스트림 복호화 방법 및 그 장치 |
US10630936B2 (en) * | 2016-09-12 | 2020-04-21 | Shidong Chen | Methods to transmit video over MIMO channel |
WO2018176341A1 (zh) * | 2017-03-30 | 2018-10-04 | 深圳市大疆创新科技有限公司 | 视频发送方法、接收方法、系统以及无人飞行器 |
WO2018176494A1 (en) * | 2017-04-01 | 2018-10-04 | SZ DJI Technology Co., Ltd. | Method and system for video transmission |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06152840A (ja) * | 1992-10-30 | 1994-05-31 | Canon Inc | 通信装置 |
WO2003017672A2 (en) * | 2001-08-15 | 2003-02-27 | Koninklijke Philips Electronics N.V. | Totally embedded fgs video coding with motion compensation |
WO2004068806A1 (ja) * | 2003-01-30 | 2004-08-12 | Matsushita Electric Industrial Co., Ltd. | 通信制御装置、通信端末装置、サーバ装置、及び通信制御方法 |
WO2004077831A1 (ja) * | 2003-02-28 | 2004-09-10 | Matsushita Electric Industrial Co., Ltd. | 映像伝送システム、映像送信装置、映像受信装置および映像伝送方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE60141722D1 (de) * | 2000-06-09 | 2010-05-12 | Lantiq Deutschland Gmbh | Verringerung von Funkfrequenzstörungen in Mehrträgerübertragungssystemen |
CN100409608C (zh) * | 2001-03-09 | 2008-08-06 | 高通弗拉里奥恩技术公司 | 通信系统中符号定时同步的方法 |
JP2003087023A (ja) * | 2001-09-13 | 2003-03-20 | Toshiba Corp | 無線通信アンテナを内蔵した携帯型情報機器 |
US6909753B2 (en) * | 2001-12-05 | 2005-06-21 | Koninklijke Philips Electronics, N.V. | Combined MPEG-4 FGS and modulation algorithm for wireless video transmission |
US8208364B2 (en) * | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
DE10254384B4 (de) * | 2002-11-17 | 2005-11-17 | Siemens Ag | Bidirektionales Signalverarbeitungsverfahren für ein MIMO-System mit einer rangadaptiven Anpassung der Datenübertragungsrate |
US20040198260A1 (en) * | 2003-02-11 | 2004-10-07 | Andreas Molisch | UWB communication system with shaped signal spectrum |
US20050254575A1 (en) * | 2004-05-12 | 2005-11-17 | Nokia Corporation | Multiple interoperability points for scalable media coding and transmission |
US7725799B2 (en) * | 2005-03-31 | 2010-05-25 | Qualcomm Incorporated | Power savings in hierarchically coded modulation |
-
2004
- 2004-09-24 CN CNA2004100118796A patent/CN1753493A/zh active Pending
-
2005
- 2005-09-22 US US11/575,826 patent/US20070274381A1/en not_active Abandoned
- 2005-09-22 WO PCT/JP2005/017508 patent/WO2006033404A1/ja active Application Filing
- 2005-09-22 CN CNA2005800322907A patent/CN101027911A/zh active Pending
- 2005-09-22 JP JP2006536421A patent/JPWO2006033404A1/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06152840A (ja) * | 1992-10-30 | 1994-05-31 | Canon Inc | 通信装置 |
WO2003017672A2 (en) * | 2001-08-15 | 2003-02-27 | Koninklijke Philips Electronics N.V. | Totally embedded fgs video coding with motion compensation |
WO2004068806A1 (ja) * | 2003-01-30 | 2004-08-12 | Matsushita Electric Industrial Co., Ltd. | 通信制御装置、通信端末装置、サーバ装置、及び通信制御方法 |
WO2004077831A1 (ja) * | 2003-02-28 | 2004-09-10 | Matsushita Electric Industrial Co., Ltd. | 映像伝送システム、映像送信装置、映像受信装置および映像伝送方法 |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009055228A (ja) * | 2007-08-24 | 2009-03-12 | Sony Corp | 無線通信システム、無線通信装置及び無線通信方法 |
US9130635B2 (en) | 2007-08-24 | 2015-09-08 | Sony Corporation | Wireless communication system, wireless communication device, and wireless communication method |
US9485000B2 (en) | 2007-08-24 | 2016-11-01 | Sony Corporation | Wireless communication system, wireless communication device, and wireless communication method |
US10763924B2 (en) | 2007-08-24 | 2020-09-01 | Sony Corporation | Wireless communication system, wireless communication device, and wireless communication method |
JP2014525162A (ja) * | 2011-12-29 | 2014-09-25 | 北京大学 | 動画伝送、受信方法および装置 |
KR101331259B1 (ko) | 2012-03-20 | 2013-11-20 | 고려대학교 산학협력단 | 데이터 전송 방법 및 장치, 그리고 데이터 수신 방법 |
CN103945246A (zh) * | 2013-01-18 | 2014-07-23 | 北京大学 | 视频传输方法和装置 |
Also Published As
Publication number | Publication date |
---|---|
US20070274381A1 (en) | 2007-11-29 |
JPWO2006033404A1 (ja) | 2008-05-15 |
CN101027911A (zh) | 2007-08-29 |
CN1753493A (zh) | 2006-03-29 |
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