Patent application number | Description | Published |
20130268761 | System and Method for Secure Asynchronous Event Notification for Adaptive Streaming Based on ISO Base Media File Format - System and method embodiments are provided for asynchronous event notification and message handling in dynamic adaptive streaming over hypertext transfer protocol (DASH). The embodiments includes sending in a segment file, from a network server to a client, a message box that is configurable for encryption, for scheduling a callback from the client, and with one or more arguments according to a messaging scheme of the message box. The network server further sends a message handling descriptor to the client for reloading a media presentation description (MPD) for obtaining a DASH event. The client then configures a universal resource locator (URL) for the MPD using the message box and the message handling descriptor, and sends the URL back to the network server. After receiving the URL, the network server sends the MPD to the client, which then uses the MPD to request segments of an asynchronous event. | 10-10-2013 |
20130290556 | Systems and Methods for Controlling Client Behavior in Adaptive Streaming - System and method embodiments are provided for controlling end client behavior in dynamic adaptive streaming over hypertext transfer protocol (HTTP) (DASH). In an embodiment, the method includes receiving, at the end client, a DASH Motion Picture Experts Group (MPEG)-2 stream (TS) segment, wherein the DASH MPEG-2 TS segment includes segmentation descriptors, and performing, with the end client, an action, such as a media presentation description (MPD) reload, indicated by the segmentation descriptor. In an embodiment, the segmentation descriptor conforms to a Society of Cable Telecommunications Engineers (SCTE) 35 protocol or a HTTP live streaming (HLS) protocol. | 10-31-2013 |
20130290698 | System and Method for Efficient Support for Short Cryptoperiods in Template Mode - System and method embodiments are provided herein for efficient representation and use of initialization vectors (IVs) for encrypted segments using template mode representation in Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH). An embodiment method includes sending in a media presentation description (MPD), from a network server to a client, a template for generating a universal resource locator (URL) to obtain an IV that is used for encrypting a segment, in absence of an IV value in the MPD, receiving from the client a URL configured according to the template, and upon receiving the URL, returning an IV corresponding to the URL to the client. Another embodiment method includes receiving in a MPD, at a client from a network server, a template for generating a URL to obtain an IV that is used for encrypting a segment, upon detecting an absence of an IV value or IV base value in the MPD, configuring a URL for the IV using the template, sending the URL for the IV, and receiving an IV. | 10-31-2013 |
20130291082 | Systems and Methods for Segment Integrity and Authenticity for Adaptive Streaming - System and method embodiments are provided for segment integrity and authenticity for adaptive streaming. In an embodiment, the method includes receiving at a data processing system a segment of a media stream, determining, with the data processing system, a digest or a digital signature for the segment, and comparing, with the data processing system, the digest/digital signature to a correct digest or a correct digital signature to determine whether the segment has been modified. | 10-31-2013 |
20140013003 | Content-Specific Identification and Timing Behavior in Dynamic Adaptive Streaming over Hypertext Transfer Protocol - An apparatus comprises a processor configured to create a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH) media presentation description (MPD), wherein the MPD comprises an AssetIdentifier element associated with a period, wherein the AssetIdentifier element specifies that the period belongs to a certain asset, and wherein the asset is content including media and metadata together with the rights to use the content by a content provider, and a transmitter configured to transmit the MPD. An apparatus comprises a receiver configured to receive a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH) media presentation description (MPD), wherein the MPD comprises an AssetIdentifier element associated with a period, wherein the AssetIdentifier element specifies that the period belongs to a certain asset, and wherein the asset is content including media and metadata together with the rights to use the content by a content provider, and a processor configured to process the MPD. | 01-09-2014 |
20140013103 | Low-Latency Secure Segment Encryption and Authentication Interface - An apparatus comprising a memory, a processor coupled to the memory and configured to obtain a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (DASH) Media Presentation Description (MPD) from an HTTP server, wherein the MPD describes a media presentation as at least one encrypted segment, and wherein the encrypted segment is associated with an availability time and a decryption key, and prefetch the decryption key associated with the encrypted segment by requesting the decryption key from a key server prior to the availability time of the encrypted segment. | 01-09-2014 |
20140013375 | Dynamic Adaptive Streaming over Hypertext Transfer Protocol Client Behavior Framework and Implementation of Session Management - An apparatus comprises a receiver configured to receive a request for a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH) media presentation description (MPD), a processor coupled to the receiver and configured to create the MPD, wherein the MPD comprises a mechanism for specifying a client's behavior, and wherein the mechanism conditions the client's ability to download content on the client's ability to support a feature, and a transmitter coupled to the processor and configured to transmit the MPD. A method comprises receiving a request for a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH) media presentation description (MPD), and transmitting the MPD, wherein the MPD comprises a mechanism for specifying a client's behavior, and wherein the mechanism conditions the client's ability to download content on the client's ability to support a feature. | 01-09-2014 |
20140019587 | Dynamic Adaptive Streaming over Hypertext Transfer Protocol as Hybrid Multirate Media Description, Delivery, and Storage Format - An apparatus comprising a memory, and a processor coupled to the memory and configured to obtain a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (DASH) Media Presentation Description (MPD) from an HTTP server, wherein the MPD describes a media presentation as a combination of an HTTP source and a non-HTTP source. A computer program product comprising computer executable instructions stored on a non-transitory computer readable medium such that when executed by a processor, cause a network element (NE) to receive a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (DASH) Media Presentation Description (MPD) from an HTTP server; and dynamically switch between a HTTP source and a non-HTTP source of the media presentation described according to the MPD. | 01-16-2014 |
20140019633 | Signaling and Processing Content with Variable Bitrates for Adaptive Streaming - A method for adaptive streaming of a media content, wherein the method comprises receiving a media presentation description that provides presentation information for the media content, determining a plurality of representations from the media presentation description that comprise segments that are provided with bitrate and quality information, selecting a media segment that meets a desired quality level to download from one of the representations, updating a buffered media time for downloading the media segment, and determining when to switch to another representation by comparing the buffered media time to a switching threshold value. | 01-16-2014 |
20140020111 | Signaling and Handling Content Encryption and Rights Management in Content Transport and Delivery - An apparatus comprising a memory, a processor coupled to the memory and configured to obtain a protection description for media content comprising a plurality of content items, wherein the protection description comprises data signaling at least two protection mechanisms for at least two content items in a media content, wherein each of the at least two content items is protected by one or more of the at least two protection mechanisms, and wherein the protection mechanisms for the at least two content items are different, determine the protection mechanisms for the at least two content items from the data, and process the at least two content items according to their associated protection mechanisms. | 01-16-2014 |
20140059180 | Carriage of ISO-BMFF Event Boxes in an MPEG-2 Transport Stream - A method of media streaming implemented by a network device, the method comprising encapsulating a message box into one or more packets in a segment, and sending the segment directly or indirectly to a streaming client. | 02-27-2014 |
20140075042 | System and Method for Segment Demarcation and Identification in Adaptive Streaming - Embodiments are provided for segment demarcation and identification in adaptive streaming by enabling marking chunks according to multiple standards simultaneously. An encoder boundary point (EBP) structure is used to indicate a plurality of partitions corresponding to a plurality of representations for a same content. A partition is a set of continuous chunks within a media stream of a defined length according to a corresponding standard. The EBP structure includes a bit-mask that is set to indicate one or more partitions in the stream. The EBP structure can indicate a boundary point for more than two partitions allowing a stream to be partitioned in several ways according to different standards. Additionally, a program map table (PMT) descriptor is used to describe each partition, providing information to process each partition. The PMT descriptor includes a packet identifier (PID) value for packets containing EBP structures. | 03-13-2014 |
20140101445 | Authenticated Encryption Support in ISO/IEC 23009-4 - A server apparatus supporting authenticated encryption in a network, comprising a receiver configured to receive an unencrypted segment, a processor configured to selecting an encryption key, an initialization vector, and an additional authentication data (AAD), encrypt the segment, configuring the segment for transfer in a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (DASH) media, assign a segment number to the encrypted segment, append an authentication tag to the encrypted segment, store the encrypted segment with the appended authentication tag, and update a Media Presentation Description (MPD) associated with the encrypted segment with the appended authentication tag, wherein the MPD comprises an @aadBase attribute with an AAD base value, wherein the AAD value is the sum of the segment number and the @ aadBase attribute value, and a transmitter configured to transmit the encrypted segment with the appended authentication tag to a destination. | 04-10-2014 |
20140156865 | Generic Substitution Parameters in DASH - A method for preparing media content in a Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH), comprising generating a parameter that comprises an identifier associated with a string value and encoding the parameter within a media presentation description (MPD), wherein the parameter is configured to be set with a parameter value independently of when the MPD is generated, and wherein the MPD provides presentation information for a media content. In another embodiment, a method for adaptive streaming of a media content in a DASH, comprising receiving an MPD that provides presentation information for the media content, determining one or more generic parameters within the MPD, and substituting one or more values for the generic parameters obtained from the MPD, wherein the generic parameters reference at least one of the following: attributes within the MPD, remote elements not available during MPD generation, and streaming client applications. | 06-05-2014 |
20140201324 | USING QUALITY INFORMATION FOR ADAPTIVE STREAMING OF MEDIA CONTENT - Different representations are associated with an instance of media content, and a representation can include multiple portions of media content. A respective quality value and bitrate can be associated with each of the portions. Information about the instance of content, including bitrate and quality information, can be accessed by and/or sent to a client. The quality information indicates the availability of measures of quality (e.g., quality values) and where those quality values reside or how they can be retrieved. The client can use quality as well as bitrate to make more intelligent decisions while streaming the content. For example, while the content is being downloaded over a network, the client can adapt to changes in available network bandwidth by selecting one portion of the instance of media content over another based not just on its bitrate but also based on its quality value. | 07-17-2014 |
20140310518 | Dynamic Adaptive Streaming Over Hypertext Transfer Protocol Service Protection - A method comprising encrypting a segment in response to receiving a segment request to generate an encrypted segment, and sending the encrypted segment, wherein encrypting the segment comprises encrypting a data content segment and a non-media segment in accordance with information provided in a dynamic adaptive streaming over hypertext transfer protocol (HTTP) (DASH) media presentation description (MPD), and wherein encrypting the segment generates an encrypted data content segment and an encrypted non-media segment. A method comprising sending a segment request, receiving an encrypted segment, wherein the encrypted segment comprises an encrypted data content segment and an encrypted non-media segment, and decrypting the encrypted segment in accordance with information provided in a DASH MPD to generate a data content segment and a non-media segment, wherein the non-media segment comprises a non-playable media. | 10-16-2014 |
20140317306 | Fragment Interface Into Dynamic Adaptive Streaming Over Hypertext Transfer Protocol Presentations - A method of Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (DASH) comprising accessing a DASH media presentation at a given time of a period on a media timeline of the DASH media presentation, and determining one or more parameters to express a state of the DASH media presentation, wherein the parameters comprise a temporal parameter that indicates the given time, and wherein the given time is relative to a start of the period. | 10-23-2014 |
20140317307 | Period Labeling in Dynamic Adaptive Streaming Over Hypertext Transfer Protocol - A method of Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (DASH) comprising receiving an asset that comprises a media presentation described in a media presentation description (MPD), wherein the media presentation comprises one or more periods, and wherein each period comprises at least one adaptation set, and identifying the asset on a period level using one or more asset identifiers specified in the MPD. | 10-23-2014 |
20150019629 | Just-in-Time Dereferencing of Remote Elements in Dynamic Adaptive Streaming over Hypertext Transfer Protocol - A method of dereferencing by a client in a network implementing Dynamic Adaptive Streaming over Hypertext Transfer Protocol (HTTP) (DASH), the method comprising receiving a first period of streaming content containing a message instructing the client to retrieve an updated media presentation description (MPD) and containing an indicator indicating a location from which the client is to retrieve the updated MPD, retrieving the updated MPD, and dereferencing a link in the updated MPD, wherein the link indicates a location of content to be streamed in a second period of streaming content described in the updated MPD, and wherein the client performs the dereferencing at a time before an end of the first period of streaming content that is twice a length of a minimum buffer time. | 01-15-2015 |
20150089533 | Specifying Client Behavior and Sessions in Dynamic Adaptive Streaming over Hypertext Transfer Protocol (DASH) - An apparatus comprises a receiver configured to receive a request for an adaptive streaming media presentation description (MPD), a processor coupled to the receiver and configured to generate the MPD, wherein the MPD comprises a parent element and a mechanism for specifying a client's behavior, wherein the parent element comprises a group of elements, wherein each element comprises a same value for a same attribute, and wherein the mechanism conditions the client's capability on the client's processing at least one of the elements, and a transmitter coupled to the processor and configured to transmit the MPD. | 03-26-2015 |