公开(公告)号：US07136066B2

公开(公告)日：2006-11-14

申请号：US10302653

申请日：2002-11-22

Applicant: Jiang Li ,  Keman Yu ,  Tielin He ,  Yunfeng Lin ,  Shipeng Li

Inventor： Jiang Li ,  Keman Yu ,  Tielin He ,  Yunfeng Lin ,  Shipeng Li

IPC: G06T17/00

CPC classification number: H04N21/41407 ,  H04N7/147 ,  H04N7/148 ,  H04N7/173 ,  H04N19/00 ,  H04N19/169 ,  H04N21/234327 ,  H04N21/4788 ,  H04N21/6131

Abstract: Generation, coding and transmission of an effective video form, scalable portrait video. As an expansion to bi-level video, portrait video is composed of more gray levels, and therefore possesses higher visual quality while it maintains a low bit rate and low computational costs. Portrait video is a scalable video in that each video with a higher level always contains all the information of the video with a lower level. The bandwidths of 2–4 level portrait videos fit into the bandwidth range of 20–40 Kbps that GPRS and CDMA 1X can stably provide. Therefore, portrait video is very promising for video broadcast and communication on 2.5 G wireless networks. With portrait video technology, this system and method is the first to enable two-way video conferencing on Pocket PCs and Handheld PCs.

公开(公告)号：US07479957B2

公开(公告)日：2009-01-20

申请号：US11067554

申请日：2005-02-25

Applicant: Jiang Li ,  Keman Yu ,  Tielin He ,  Yunfeng Lin ,  Shipeng Li

Inventor： Jiang Li ,  Keman Yu ,  Tielin He ,  Yunfeng Lin ,  Shipeng Li

IPC: G06T15/00

CPC classification number: H04N21/41407 ,  H04N7/147 ,  H04N7/148 ,  H04N7/173 ,  H04N19/00 ,  H04N19/169 ,  H04N21/234327 ,  H04N21/4788 ,  H04N21/6131

Abstract: Generation, coding and transmission of an effective video form, scalable portrait video. As an expansion to bi-level video, portrait video is composed of more gray levels, and therefore possesses higher visual quality while it maintains a low bit rate and low computational costs. Portrait video is a scalable video in that each video with a higher level always contains all the information of the video with a lower level. The bandwidths of 2-4 level portrait videos fit into the bandwidth range of 20-40 Kbps that GPRS and CDMA 1X can stably provide. Therefore, portrait video is very promising for video broadcast and communication on 2.5 G wireless networks. With portrait video technology, this system and method is the first to enable two-way video conferencing on Pocket PCs and Handheld PCs.

Abstract translation: 生成，编码和传输有效的视频格式，可缩放的肖像视频。 作为双级视频的扩展，纵向视频由更多的灰度级组成，因此拥有更高的视觉质量，同时保持较低的比特率和低的计算成本。 肖像视频是一个可扩展的视频，每个具有更高级别的视频始终包含具有较低级别的视频的所有信息。 2-4级纵向视频的带宽适应GPRS和CDMA 1X可以稳定提供的20-40 Kbps的带宽范围。 因此，肖像视频对于2.5G无线网络的视频广播和通信非常有希望。 利用肖像视频技术，该系统和方法是率先在掌上电脑和掌上电脑上实现双向视频会议的方法。

公开(公告)号：US20050140674A1

公开(公告)日：2005-06-30

申请号：US11067554

申请日：2005-02-25

Applicant: Jiang Li ,  Keman Yu ,  Tielin He ,  Yunfeng Lin ,  Shipeng Li

Inventor： Jiang Li ,  Keman Yu ,  Tielin He ,  Yunfeng Lin ,  Shipeng Li

IPC: H04N7/14 ,  H04N7/173 ,  H04N7/26 ,  G06K9/36

CPC classification number: H04N21/41407 ,  H04N7/147 ,  H04N7/148 ,  H04N7/173 ,  H04N19/00 ,  H04N19/169 ,  H04N21/234327 ,  H04N21/4788 ,  H04N21/6131

Abstract: Generation, coding and transmission of an effective video form, scalable portrait video. As an expansion to bi-level video, portrait video is composed of more gray levels, and therefore possesses higher visual quality while it maintains a low bit rate and low computational costs. Portrait video is a scalable video in that each video with a higher level always contains all the information of the video with a lower level. The bandwidths of 2-4 level portrait videos fit into the bandwidth range of 20-40 Kbps that GPRS and CDMA 1× can stably provide. Therefore, portrait video is very promising for video broadcast and communication on 2.5G wireless networks. With portrait video technology, this system and method is the first to enable two-way video conferencing on Pocket PCs and Handheld PCs.

Abstract translation: 生成，编码和传输有效的视频格式，可缩放的肖像视频。 作为双级视频的扩展，纵向视频由更多的灰度级组成，因此拥有更高的视觉质量，同时保持较低的比特率和低的计算成本。 肖像视频是一个可扩展的视频，每个具有更高级别的视频始终包含具有较低级别的视频的所有信息。 2-4级画像视频的带宽适应GPRS和CDMA 1x可以稳定提供的20-40 Kbps的带宽范围。 因此，肖像视频对于2.5G无线网络上的视频广播和通信非常有希望。 利用肖像视频技术，该系统和方法是率先在掌上电脑和掌上电脑上实现双向视频会议的方法。

公开(公告)号：US20090110065A1

公开(公告)日：2009-04-30

申请号：US12288281

申请日：2008-10-17

Applicant: Jiang Li ,  Keman Yu ,  Tielin He ,  Yunfeng Lin ,  Shipeng Li

Inventor： Jiang Li ,  Keman Yu ,  Tielin He ,  Yunfeng Lin ,  Shipeng Li

IPC: H04N7/12

CPC classification number: H04N21/41407 ,  H04N7/147 ,  H04N7/148 ,  H04N7/173 ,  H04N19/00 ,  H04N19/169 ,  H04N21/234327 ,  H04N21/4788 ,  H04N21/6131

Abstract: Generation, coding and transmission of an effective video form, scalable portrait video. As an expansion to bi-level video, portrait video is composed of more gray levels, and therefore possesses higher visual quality while it maintains a low bit rate and low computational costs. Portrait video is a scalable video in that each video with a higher level always contains all the information of the video with a lower level. The bandwidths of 2-4 level portrait videos fit into the bandwidth range of 20-40 Kbps that GPRS and CDMA 1X can stably provide. Therefore, portrait video is very promising for video broadcast and communication on 2.5 G wireless networks. With portrait video technology, this system and method is the first to enable two-way video conferencing on Pocket PCs and Handheld PCs.