公开(公告)号：US20140281556A1

公开(公告)日：2014-09-18

申请号：US13802721

申请日：2013-03-14

Applicant: QUALCOMM INCORPORATED

Inventor： Yinian MAO ,  Fatih ULUPINAR

IPC: H04L9/32

CPC classification number: H04L63/126 ,  H04L63/166 ,  H04L65/4084 ,  H04L65/608 ,  H04L67/02

Abstract: Methods and systems are described for verifying the source and integrity of a media presentation description (MPD) defined by the Dynamic Adaptive Streaming over HTTP (DASH) protocol. A streaming client receives an MPD from an MPD publisher. The MPD can include addresses associated with one or more media servers and/or advertising servers. The streaming client can receive from the MPD publisher at least one of a digital signature, cryptographic key, and certificate information associated with the MPD. The streaming client can verify the legitimacy of the MPD by verifying the digital signature using the received cryptographic key. The streaming client may use the certificate information to verify the MPD. The streaming client can prevent playing the media associated with the MPD if the MPD is not legitimate. The legitimacy of servers associated with addresses in the MPD may also be verified using authentication information for servers stored in the MPD.

Abstract translation: 描述了用于验证由动态自适应流HTTP（DASH）协议定义的媒体呈现描述（MPD）的源和完整性的方法和系统。 流媒体客户端从MPD发布者接收MPD。 MPD可以包括与一个或多个媒体服务器和/或广告服务器相关联的地址。 流媒体客户端可以从MPD发布者接收与MPD相关联的数字签名，加密密钥和证书信息中的至少一个。 流客户端可以通过使用接收的加密密钥验证数字签名来验证MPD的合法性。 流媒体客户端可以使用证书信息来验证MPD。 如果MPD不合法，流媒体客户端可以阻止播放与MPD相关联的媒体。 与MPD中的地址相关联的服务器的合法性也可以使用存储在MPD中的服务器的认证信息进行验证。

公开(公告)号：US20140222962A1

公开(公告)日：2014-08-07

申请号：US14041724

申请日：2013-09-30

Applicant: Qualcomm Incorporated

Inventor： Yinian MAO ,  Fatih ULUPINAR ,  Donald W. GILLIES

IPC: H04L29/06

CPC classification number: H04L65/60 ,  H04L27/0012 ,  H04L65/403 ,  H04L65/4076 ,  H04L65/4084 ,  H04L65/602 ,  H04L65/608 ,  H04L67/02 ,  H04N21/4305 ,  H04N21/6125 ,  H04N21/8456

Abstract: A client device includes one or more processors configured to send a plurality of probe requests for segments of media data to a server device, wherein the server device provides the media data using a live streaming service, analyze responses to the plurality of probe requests to determine a left edge and a right edge of a segment availability window, and send a request for a segment within the segment availability window based on the determined left edge and the determined right edge of the segment availability window, in accordance with the live streaming service.

Abstract translation: 客户端设备包括被配置为向服务器设备发送多个媒体数据段的探测请求的一个或多个处理器，其中服务器设备使用直播流服务提供媒体数据，分析对多个探测请求的响应以确定 段可用性窗口的左边缘和右边缘，并且根据实时流传输服务，基于所确定的左边缘和所确定的段可用性窗口的右边缘，向段可用性窗口内的段发送请求。

公开(公告)号：US20130262567A1

公开(公告)日：2013-10-03

申请号：US13838744

申请日：2013-03-15

Applicant: QUALCOMM INCORPORATED

Inventor： Gordon Kent WALKER ,  Michael G. LUBY ,  Nagaraju NAIK ,  Jack S. SHAUH ,  Kuo-Chun LEE ,  Yinian MAO ,  Thomas STOCKHAMMER ,  Charles N. LO ,  Kevin R. FALL

IPC: H04L29/08

CPC classification number: H04L67/06 ,  G06F17/30899 ,  H04L67/02 ,  H04L69/329

Abstract: Embodiments enable HTTP servers to pass incomplete and/or corrupted files in response to file requests from clients. In the various embodiments, HTTP servers may be enabled to generate status codes identifying that an incomplete version of a file is being returned in response to a file request. In an embodiment, an HTTP server may be enabled to determine the ability of a client to handle incomplete versions of files.

Abstract translation: 实施例使HTTP服务器能够响应来自客户端的文件请求传递不完整和/或损坏的文件。 在各种实施例中，可以使HTTP服务器能够生成识别文件的不完整版本正在被响应于文件请求被返回的状态代码。 在一个实施例中，可以启用HTTP服务器来确定客户端处理不完整版本的文件的能力。

公开(公告)号：US20130227122A1

公开(公告)日：2013-08-29

申请号：US13745811

申请日：2013-01-20

Applicant: QUALCOMM Incorporated

Inventor： Qiang GAO ,  Michael George LUBY ,  Yinian MAO ,  Lorenz Christoph MINDER

IPC: H04L29/06

CPC classification number: H04L65/60 ,  H04L43/16 ,  H04L47/10 ,  H04L47/266 ,  H04L47/29 ,  H04L47/30 ,  H04L65/1083 ,  H04L65/4084 ,  H04L65/4092 ,  H04L65/604 ,  H04L65/608 ,  H04L65/80 ,  H04N5/783 ,  H04N21/23439 ,  H04N21/239 ,  H04N21/2401 ,  H04N21/2402 ,  H04N21/44004 ,  H04N21/442 ,  H04N21/6373 ,  H04N21/64769 ,  H04N21/8456

Abstract: A client/receiver downloads data over a network path between a source and the receiver coupled by the network path and stores the media data in a presentation buffer of the receiver and from there it is consumed by a presentation element. The receiver monitors a presentation buffer fill level that represents what portion of the presentation buffer contains media data not yet consumed by a presentation element. The receiver makes requests for additional data to download. If the fill level is above a high fill threshold, the receiver does not make further requests and eventually the fill level goes down. If the fill level is below a low fill threshold, the receiver restarts the downloading and updates the fill level as media data is consumed by the presentation element. The fill level might be measured in units of memory storage capacity and/or units of presentation time.

Abstract translation: 客户端/接收者通过由网络路径耦合的源和接收器之间的网络路径下载数据，并将媒体数据存储在接收机的呈现缓冲器中，并从那里被表示元素消耗。 接收器监视呈现缓冲器填充级别，其表示呈现缓冲器的哪部分包含尚未被表示元素消耗的媒体数据。 接收方要求下载其他数据。 如果填充水平高于高填充阈值，则接收器不会进一步请求，最终填充水平下降。 如果填充水平低于低填充阈值，则当介质数据被表示元素消耗时，接收器重新启动下载并更新填充水平。 填充级别可以以存储器容量和/或呈现时间单位为单位来测量。

公开(公告)号：US20140156863A1

公开(公告)日：2014-06-05

申请号：US13745799

申请日：2013-01-19

Applicant: QUALCOMM Incorporated

Inventor： Qiang GAO ,  Michael George LUBY ,  Yinian MAO ,  Lorenz Christoph MINDER

IPC: H04L29/06

CPC classification number: H04L65/60 ,  H04L43/0888 ,  H04L43/0894 ,  H04L47/10 ,  H04L47/263 ,  H04L47/30 ,  H04L65/4084 ,  H04L65/608 ,  H04L65/80 ,  H04N21/2401 ,  H04N21/2402 ,  H04N21/44209 ,  H04N21/6373 ,  H04W28/22

Abstract: A client device presents streaming media and includes a stream manager for controlling streams, a request accelerator for making network requests for content, a source component coupled to the stream manager and the request accelerator for determining which requests to make, a network connection, and a media player. A process for rate estimation is provided that will react quickly to reception rate changes. The rate estimator can use an adaptive windowed average and take into account the video buffer level and the change in video buffer level in a way so to guarantee that the rate adjusts fast enough if there is a need, while keeping the windowing width large (and thus the measurement variance) large. A guarantee might be that when a rate drop or rise happens, the estimator adjusts its estimate within a time proportional to a buffer drain rate or buffer fill level.

Abstract translation: 客户端设备呈现流媒体，包括用于控制流的流管理器，用于对内容进行网络请求的请求加速器，耦合到流管理器的源组件和用于确定要进行哪些请求的请求加速器，网络连接和 媒体播放器。 提供了速率估计过程，其将对接收速率变化做出快速反应。 速率估计器可以使用自适应窗口平均值，并且考虑视频缓冲器电平和视频缓冲器电平的变化，以便保证速率在有需要时调节得足够快，同时保持窗口宽度的大（和 因此测量方差）大。 保证可能是当速率下降或上升发生时，估计器在与缓冲器排出速率或缓冲器填充水平成比例的时间内调整其估计。

公开(公告)号：US20150289138A1

公开(公告)日：2015-10-08

申请号：US14745266

申请日：2015-06-19

Applicant: QUALCOMM Incorporated

Inventor： Jun WANG ,  Anand Palanigounder ,  Peerapol TINNAKORNSRISUPHAP ,  George CHERIAN ,  Chandrasekhar Therazhandur Sundarraman ,  Yinian MAO ,  Peter Hans RAUBER

IPC: H04W12/06 ,  H04L29/06

CPC classification number: H04W12/06 ,  H04L63/0892 ,  H04L63/101 ,  H04W12/08 ,  H04W84/045

Abstract: Access by a mobile station to a femto access point (FAP) of a wireless communication system is controlled by an enforcement point in response to mobile station authorization data provided from a storage point that is remote from the FAP. The authorization data is provided in response to FAP authentication data. The authentication data may include a FAP identifier and a message authenticator that the FAP generates by hashing shared secret information. The storage point may provide the authorization data in response to determining that the message authenticator is a hash of the shared secret information.

Abstract translation: 响应于从远离FAP的存储点提供的移动台授权数据，由执行点控制移动台到无线通信系统的毫微微接入点（FAP）的接入。 响应于FAP认证数据提供授权数据。 认证数据可以包括FAP标识符和FAP通过散列共享秘密信息产生的消息认证器。 存储点可以响应于确定消息认证器是共享秘密信息的散列来提供授权数据。

公开(公告)号：US20130227080A1

公开(公告)日：2013-08-29

申请号：US13745809

申请日：2013-01-20

Applicant: QUALCOMM Incorporated

Inventor： Qiang GAO ,  Michael George LUBY ,  Yinian MAO ,  Lorenz Christoph MINDER ,  Kevin Roland FALL

IPC: H04L29/06

CPC classification number: H04L65/60 ,  H04L43/16 ,  H04L47/10 ,  H04L47/266 ,  H04L47/29 ,  H04L47/30 ,  H04L65/1083 ,  H04L65/4084 ,  H04L65/4092 ,  H04L65/604 ,  H04L65/608 ,  H04L65/80 ,  H04N5/783 ,  H04N21/23439 ,  H04N21/239 ,  H04N21/2401 ,  H04N21/2402 ,  H04N21/44004 ,  H04N21/442 ,  H04N21/6373 ,  H04N21/64769 ,  H04N21/8456

Abstract: A client device presents streaming media and includes a stream manager, a request accelerator, and a source component coupled to the stream manager and the request accelerator for determining which requests to make. A rate selection process can make rate decisions so that the buffer is filled when it is low, avoiding erratically changing rates and can choose the correct steady rate quickly. Multimedia download strategies can be used for HTTP that allow for accurate rate estimations, achieving link capacity even if network delays and packet loss rates are high, achieving timely delivery of the stream, and achieving relatively steady download rates with little short term variability. A receiver might use multiple HTTP connections, decompose media requests into smaller chunk requests, synchronize the connections using TCP flow control mechanisms, and request data in bursts. In addition, the receiver might use an HTTP pipelining process to keep the connections busy.

Abstract translation: 客户端设备呈现流媒体，并且包括流管理器，请求加速器和耦合到流管理器的源组件和用于确定要进行哪些请求的请求加速器。 速率选择过程可以进行速率决定，以便缓冲器在低时被填充，避免不断变化的速率，并可以快速选择正确的稳定速率。 多媒体下载策略可用于允许精确率估计的HTTP，即使网络延迟和丢包率较高，实现链路容量，实现流的及时传递，并实现相对稳定的下载速率，几乎没有短期变化。 接收机可能会使用多个HTTP连接，将媒体请求分解成较小的块请求，使用TCP流控制机制同步连接，并以突发方式请求数据。 此外，接收器可能会使用HTTP流水线过程来保持连接繁忙。