公开(公告)号：US09602208B2

公开(公告)日：2017-03-21

申请号：US13948099

申请日：2013-07-22

Applicant: Broadcom Corporation

Inventor： Yong Li ,  Xuemin Chen

IPC: H04B10/04 ,  H04B10/12 ,  H04B10/2575

CPC classification number: H04B10/25751

Abstract: A content distribution system may include a headend server and media converters, the headend server being configured to distribute content items to user devices via the media converters and gateway devices. Each of the media converters may include a media converter cache and may be coupled to the headend server and a subset of the gateway devices, where each of the user devices is communicatively coupled to one of the gateway devices. The headend server may be further configured to determine one of the content items that is expected to be requested by a group of the user devices, determine one of the media converters that is coupled, via the subset of the gateway devices, to a largest number of user devices in the group of the user devices, and coordinate storing the one of the content items in the media converter cache of the one of the media converters.

公开(公告)号：US09241204B2

公开(公告)日：2016-01-19

申请号：US13929696

申请日：2013-06-27

Applicant: Broadcom Corporation

Inventor： Yong Li ,  Bradley Donald Blanche ,  Xuemin Chen

IPC: H04Q11/04 ,  H04L27/00 ,  H04N21/845 ,  H04N21/2343 ,  H04N21/262 ,  H04N21/442 ,  H04N21/45 ,  H04N21/63

CPC classification number: H04Q11/0478 ,  H04L27/00 ,  H04N21/23439 ,  H04N21/26258 ,  H04N21/44209 ,  H04N21/4524 ,  H04N21/631 ,  H04N21/8456

Abstract: A system for transmitting multiple adaptive bit rate (ABR) segment streams on a shared frequency may include an ABR segment generator and transmitter circuitry. The ABR segment generator may encode a content item based at least in part on different ABR profiles to generate encoded streams. The ABR profiles may indicate encoding parameters corresponding to the encoded streams, e.g., bit rates, resolutions, frame rates and/or codecs. The ABR segment generator may be further configured to segment the encoded streams to generate ABR segment streams. The transmitter circuitry may be configured to transmit the ABR segment streams on a shared frequency, such as by transmitting the segment streams over spatially separated antennas, or by applying different orbital angular momentums to the ABR segment streams. In one or more implementations, the system may further include a segment interleaver that is configured to interleave the ABR segment streams.

Abstract translation: 用于在共享频率上发送多个自适应比特率（ABR）段流的系统可以包括ABR段发生器和发射机电路。 ABR段生成器可以至少部分地基于不同的ABR简档对内容项进行编码，以生成编码流。 ABR简档可以指示对应于编码流的编码参数，例如比特率，分辨率，帧速率和/或编解码器。 ABR段生成器还可以被配置为分段编码流以生成ABR段流。 发射机电路可以被配置为在共享频率上发送ABR分段流，例如通过在空间分离的天线上发射分段流，或者通过向ABR分段流应用不同的轨道角动量。 在一个或多个实现中，系统还可以包括被配置为交织ABR段流的段交织器。

公开(公告)号：US09445060B2

公开(公告)日：2016-09-13

申请号：US13948103

申请日：2013-07-22

Applicant: Broadcom Corporation

Inventor： Yong Li ,  Xuemin Chen

IPC: H04N7/01 ,  H04N19/423 ,  H04N19/40 ,  H04N21/231 ,  H04N21/2343 ,  H04N21/643

CPC classification number: H04N19/423 ,  H04N19/40 ,  H04N21/23106 ,  H04N21/2343 ,  H04N21/64322

Abstract: A system for transcoding locally cached content may include a memory configured to store at least a video stream. A controller communicatively coupled to the memory may be configured to determine a video definition format of a requested video stream and compare the requested video stream with a video definition format of a cached version of the requested video stream. A transcoder coupled to the controller may be configured to convert the cached version of the requested video stream to a lower video definition format if the video definition format of the cached version is determined to be higher than the video definition format of the requested video stream. If the video definition format of the requested video stream is same as the video definition format of the cached version, the controller may supply the requested video stream using the cached version stored in the memory without transcoding.

Abstract translation: 用于代码转换本地缓存的内容的系统可以包括被配置为存储至少一个视频流的存储器。 通信地耦合到存储器的控制器可以被配置为确定所请求的视频流的视频定义格式，并将所请求的视频流与所请求的视频流的缓存版本的视频定义格式进行比较。 耦合到控制器的代码转换器可以被配置为如果确定缓存版本的视频定义格式高于所请求的视频流的视频定义格式，则将所请求的视频流的高速缓存版本转换为较低的视频定义格式。 如果请求的视频流的视频定义格式与缓存版本的视频定义格式相同，则控制器可以使用存储在存储器中的高速缓存版本来提供所请求的视频流，而不需要转码。

公开(公告)号：US09413806B2

公开(公告)日：2016-08-09

申请号：US14042651

申请日：2013-09-30

Applicant: Broadcom Corporation

Inventor： Yong Li ,  Xuemin Chen ,  Alexander Garland Macinnis ,  Brian Francis Schoner

IPC: G06F15/173 ,  H04L29/08 ,  G06Q30/02 ,  H04L29/06 ,  H04N21/2225 ,  H04N21/2343 ,  H04N21/24 ,  H04N21/61 ,  H04N21/845

CPC classification number: H04L67/02 ,  G06Q30/0242 ,  H04L65/4084 ,  H04L65/601 ,  H04L65/602 ,  H04N21/2225 ,  H04N21/23439 ,  H04N21/2402 ,  H04N21/6125 ,  H04N21/8456

Abstract: A device and method for providing an adaptive bit rate (ABR) proxy is disclosed. An ABR proxy determines an optimal data format to receive content segments for an audio/video (AV) content item from a source ABR server, and generates, based on that format and/or current network conditions, one or more local AV representations for providing content segments for the AV content item to locally connected devices. A local client device selects a local AV representation, and the ABR proxy provides the content segments for the AV content item to the local device in accordance with the selected local AV representation.

Abstract translation: 公开了一种用于提供自适应比特率（ABR）代理的设备和方法。 ABR代理确定从源ABR服务器接收音频/视频（AV）内容项的内容片段的最佳数据格式，并且基于该格式和/或当前网络条件生成一个或多个本地AV表示，用于提供 AV内容项到本地连接设备的内容片段。 本地客户端设备选择本地AV表示，并且ABR代理根据所选择的本地AV表示向AV设备提供用于AV内容项目的内容片段到本地设备。

公开(公告)号：US09253532B2

公开(公告)日：2016-02-02

申请号：US14514188

申请日：2014-10-14

Applicant: Broadcom Corporation

Inventor： Xuemin Chen ,  Yong Li ,  Arlen J. Kirchoff, Jr.

IPC: H04N7/14 ,  H04N21/4363 ,  H04N7/15 ,  H04L12/18 ,  H04N21/436 ,  H04N21/643 ,  H04N21/845 ,  H04N21/2389 ,  H04N21/242 ,  H04N21/4385 ,  H04N19/103 ,  H04N19/164 ,  H04N19/184 ,  H04N19/196

CPC classification number: H04N21/4363 ,  H04L12/1827 ,  H04N7/15 ,  H04N7/152 ,  H04N19/103 ,  H04N19/164 ,  H04N19/184 ,  H04N19/196 ,  H04N21/2389 ,  H04N21/242 ,  H04N21/43615 ,  H04N21/4385 ,  H04N21/64322 ,  H04N21/8456

Abstract: A participation device in a multiparty conference call may act as a server device and/or a client device for two-way audio and video (AV) streaming. A server device may encode a requested AV stream into a set of different encoding profiles that may be dynamically determined based on the varying channel conditions and device capacities of the client devices. At least a portion of differently encoded AV streams is selected and dynamically communicated to the client devices for display. Session parameters are determined according to the varying channel conditions and the device capacities of the client devices to create intended sessions. The selected encoded AV streams are communicated utilizing segment-based adaptive streaming techniques such as HTTP. A client device may access to a HTTP session to download an expected AV stream from the server device. The downloaded AV stream may be decoded into different decoding profiles for display as needed.

Abstract translation: 多方电话会议中的参与设备可以用作用于双向音频和视频（AV）流传输的服务器设备和/或客户端设备。 服务器设备可以将所请求的AV流编码为可以基于客户端设备的变化的信道条件和设备容量来动态地确定的一组不同的编码简档。 至少一部分不同编码的AV流被选择并动态地传送到客户端设备进行显示。 会话参数根据不同的信道条件和客户端设备创建预期会话的设备容量来确定。 使用诸如HTTP的基于段的自适应流技术来传送所选编码的AV流。 客户端设备可以访问HTTP会话以从服务器设备下载预期的AV流。 下载的AV流可以被解码成不同的解码配置文件，以便根据需要进行显示。

公开(公告)号：US09215080B2

公开(公告)日：2015-12-15

申请号：US13928248

申请日：2013-06-26

Applicant: Broadcom Corporation

Inventor： Yong Li ,  Xuemin Chen ,  Rajesh Shankarrao Mamidwar

IPC: H04L12/18

CPC classification number: H04L12/184

Abstract: A system for adaptive bit rate distribution of multicast streams may include one or more processors and a memory. The one or more processors may be configured to identify streams, such as multicast streams, transmitted by a content delivery network. The streams may each contain a content item that is encoded at a different bit rate for each stream. The one or more processors may determine segments of the streams, for example based on time stamps associated with the content item or markers of the streams. The one or more processors may transmit a first segment of a first stream encoded at a first bit rate to a user device in response to a request therefor and, upon completing the transmission of the first segment, transmit a second segment of a second stream encoded at a second bit rate to the user device in response to a request therefor.

Abstract translation: 用于组播流的自适应比特率分配的系统可以包括一个或多个处理器和存储器。 一个或多个处理器可以被配置为识别由内容传送网络发送的诸如多播流的流。 流可以各自包含以每个流的不同比特率编码的内容项。 一个或多个处理器可以例如基于与流的内容项或标记相关联的时间戳来确定流的段。 一个或多个处理器可以响应于其请求向第一比特率传送以第一比特率编码的第一流的第一段，并且在完成第一段的传输时，发送编码的第二流的第二段 响应于其请求以用户设备的第二比特率。