WO2002028085A2 - Reusing decoded multimedia data for multiple users - Google Patents
Reusing decoded multimedia data for multiple users Download PDFInfo
- Publication number
- WO2002028085A2 WO2002028085A2 PCT/US2001/042401 US0142401W WO0228085A2 WO 2002028085 A2 WO2002028085 A2 WO 2002028085A2 US 0142401 W US0142401 W US 0142401W WO 0228085 A2 WO0228085 A2 WO 0228085A2
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- WO
- WIPO (PCT)
- Prior art keywords
- storage
- data
- media
- requested data
- decoded
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/21815—Source of audio or video content, e.g. local disk arrays comprising local storage units
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/222—Secondary servers, e.g. proxy server, cable television Head-end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
- H04N21/23106—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion involving caching operations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/27—Server based end-user applications
- H04N21/274—Storing end-user multimedia data in response to end-user request, e.g. network recorder
- H04N21/2747—Remote storage of video programs received via the downstream path, e.g. from the server
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
- H04N7/17336—Handling of requests in head-ends
Definitions
- Multimedia is the distribution of information from a variety of information sources in more than one form, e.g., pictures, voices and videos along with traditional text, to provide pictures and animation. Such information may be encoded/compressed in various formats for efficient storage and transmission purposes and may need decoding/decompression prior to its final display.
- each user typically requires its own media storage and decoder so that the data may be stored and manipulated by individual users.
- FIG. 1 illustrates a Replay TV environment where a stream of television content is being broadcast to individual users.
- each user In order for each user to have independent control of what and when he desires to playback the received content, each user must have a media storage for storing the received content, a media decoder for decoding the content, a media controller for controlling the portion desired and a display for displaying the decoded content.
- live TV broadcast may be received at each user from a media source 102.
- Media storage 112 at user 1 stores the received broadcast.
- media decoder 122 decodes the desired portion of the stored broadcast.
- a media controller 132 transmits the decoded data to a user display 142.
- media storage 114 at user 2 stores the received broadcast so he can manipulate the stored data for output, independent from user 1.
- This invention relates to multimedia data decoding in a network environment where encoded data is decoded and the decoded data is then stored in a storage that is accessible to multiple users on the network.
- an event may initiate a search (e.g., playback, fast-forward, different speed) for the requested data in an encoded data storage.
- the found data is decoded and the decoded data is then stored in the storage.
- the requested data may also come from live feed, in which case the storage management unit may search for the requested data as live data is received.
- encoded data is decoded once and stored in a nonvolatile storage.
- the decoded data is stored in a volatile storage where old data is erased as new data is stored when incoming data exceeds storage size.
- One or more embodiments of the invention may be implemented as computer software in the form of computer readable code executed on a general purpose computer, in the form of bytecode class files executable within a JavaTM runtime environment running on such a computer, or in the form of bytecodes running on a processor (or devices enabled to process bytecodes) existing in a distributed environment (e.g., one or more processor on a network).
- a general purpose computer in the form of bytecode class files executable within a JavaTM runtime environment running on such a computer, or in the form of bytecodes running on a processor (or devices enabled to process bytecodes) existing in a distributed environment (e.g., one or more processor on a network).
- a processor or devices enabled to process bytecodes
- any suitable computer system and programming/processing environment may be used.
- the present invention may be implemented in computer systems where the data is provided through a network such as a local area network (LAN), a wide area network (WAN), the internet, world wide web (Web), or other suitable network configurations.
- FIG. 2 illustrates a virtual desktop architecture where one or more servers (e.g., servers 152 through 156) communicate with one or more desktop units (DTUs) such as DTUs 170, 180 and 190 through an interconnect fabric 160.
- DTUs desktop units
- the service machines handle the translation to and from the virtual desktop architecture wire protocol.
- Computers 152, 153, 154, 155 and 156 may be service producing machines such as a proxy for another device providing the computational service (e.g., a database computer in a three tiered architecture, where the proxy computer might only generate queries and execute user interface code). Any of computers 152, 153, 154, 155 and 156 may be implemented as a transmitter. In one embodiment, computers 152, 153, 154, 155 and 156 connect directly to DTUs 170, 180 and 190 through interconnect fabric 160.
- Interconnect fabric 160 may be any suitable communication paths for carrying data between services 150 and DTUs 170, 180 and 190.
- interconnect fabric 160 is a local area network implemented as an Ethernet network.
- Other local network, wide area networks, the internet, the world wide web, and other types of communication path may also be utilized.
- Internet fabric 160 may be implemented with a physical medium such as a wire or fiber optic cable, or it may be implemented in a wireless environment.
- DTUs 170, 180, and 190 are the means by which users can access the computational services provided by the servers or services 150, and as such, DTUs 170, 180 and 190 may also be referred to as a client, user workstation, terminal or HID.
- a desktop unit includes a display, a keyboard, a mouse and audio speakers.
- DTU 170 includes a display 171, a keyboard 174, a mouse 175, and audio speakers 172.
- DTUs include the electronics needed to interface attached devices (e.g., display, keyboard, mouse and speakers) to interconnect fabric 160 and to transmit data to and receive data from the services 150.
- Desktop units 170, 180 and 190 may be any suitable computer systems, including general purpose computers, client-server systems, or network computers.
- desktop units 170, 180 and 190 may be workstations from, e.g., Sun Microsystems, inc., IBM Corporation, Hewlett Packard, Digital and other manufacturers. Any of DTUs 170, 180 and 190 may be implemented as a receiver.
- Keyboard 174 and mouse 175 introduce user input and communicate that user input with the DTU they are attached to.
- Other suitable input devices e.g., scanner, digital camera
- Display 171 and audio speakers 172 are output devices.
- Other suitable output devices e.g., printer
- FIG. 3 illustrates a block diagram of an embodiment of a desktop unit illustrated in FIG. 2.
- Various components of the DTU are coupled internally to a Peripheral Component Interconnect (PCI) bus 226.
- PCI Peripheral Component Interconnect
- a network controller 210 is coupled to PCI bus 226 and communicates to an interconnect fabric such as an ethernet, through path 228.
- An audio codec 212 receives audio data on interface 230 and is coupled to network controller 210. Audio codec may be a hardware circuit (chip) or software routine that converts sound into digital code and vice versa.
- USB Universal Serial Bus
- An embedded processor 204 is coupled to PCI bus 226.
- Embedded processor 204 may be, for example, a Sparc2ep, which is coupled to a flash memory 206 and a dynamic random access memory (DRAM) 208.
- processor 204 may be a SPARCTM microprocessor manufactured by Sun Microsystems, Inc., a 680X0 processor manufactured by Motorola, a 80X86 manufactured by Intel, a Pentium processor, or any other suitable microprocessor or microcomputer.
- a video controller e.g., frame buffer controller 214, is also coupled to PCI bus 226.
- Video controller 214 may be, for example, an ATI RagePro+ frame buffer controller (or any other suitable controller) that provides Super Video Graphics Array (SVGA) output on path 236.
- SVGA Super Video Graphics Array
- National TV Standards Committee (NTSC) or Phase Alternating Line (PAL) data may be provided via path 232 to video controller 214 through video decoder 220.
- NTSC or PAL data may be provided via path 234 from video controller 214 through a video encoder 222.
- a smart card interface 218 and a Synchronous Graphics Random Access Memory (SGRAM) 216 may also be coupled to video controller 214.
- SGRAM Synchronous Graphics Random Access Memory
- desktop units 170, 180 and 190 may be implemented using a single chip that includes necessary processing capabilities and graphic Tenderer.
- FIG. 4 shows a general purpose computer 250 that may be used to implement servers 152 through 156 shown in FIG. 2.
- a keyboard 251 and mouse 252 are coupled to a bi-directional system bus 253. Keyboard 251 and mouse 252 introduce user input to computer system 250 and communicate user input to a processor 254. Other suitable input devices may be used in addition to, or in place of, mouse 252 and/or keyboard 251.
- I/O (input/output) unit 255 coupled to bi-directional system bus 253 represents I/O elements such as printers, A/V (audio/video) I/Os, etc.
- Bi-directional system bus 253 may contain, for example, thirty-two address lines for addressing a video memory 256 or a main memory 257.
- System bus 253 may also includes, for example, a 32-bit data bus for transferring data between and among components, e.g., processor 254, main memory 257, video memory 256 and mass storage 258, all coupled to bus 253.
- multiplex data/address lines may be used instead of separate data and address lines.
- Main memory 257 may comprise dynamic random access memory (DRAM) or other suitable memories.
- Video memory 256 may be a dual-ported video random access memory.
- one port of video memory 256 may be coupled to a video amplifier 259 which is used to drive a monitor 260 which may be a cathode ray tube (CRT) raster monitor, a liquid crystal display (LCD), or any suitable monitors for displaying graphic images.
- Video amplifier 259 is well known in the art and may be implemented by any suitable apparatus.
- pixel data stored in video memory 256 is converted to a raster signal suitable for use by monitor 260.
- Mass storage 258 may include both fixed and removable media, such as magnetic, optical or magnetic optical storage systems or any other available mass storage technology.
- Computer 250 may include a communication interface 261 coupled to bidirectional system bus 253.
- Communication interface 261 provides a two-way data communication via a network link 262 to a local network 263.
- communication interface 261 is an integrated service digital network (ISDN) card or a modem
- ISDN integrated service digital network
- communication interface 261 provides a data communication connection to the corresponding type of telephone line, which comprises part of network link 262.
- ISDN integrated service digital network
- LAN local area network,
- Wireless links are also possible.
- communication interface 261 sends and receives electrical, electromagnetic or optical signals which carry digital data streams representing various types of information.
- Network link 262 typically provides data communication through one or more networks to other data devices.
- network link 262 may provide a connection through local network 263 to a host computer 264 or to data equipment operated by an Internet Service Provider (ISP) 265.
- ISP 265 in turn provides data communication services through the world wide packet data communication network commonly referred to as the "internet" 266.
- Local network 263 and internet 266 both use electrical, electromagnetic or optical signals which carry digital data streams.
- the signals through the various networks and the signals on network link 262 and through communication interface 261, which carry the digital data to and from computer 250, are exemplary forms of carrier waves transporting the information.
- Computer 250 can send messages and receive data, including program code, through these communication channels.
- server 267 might transmit a requested code for an application program through Internet 266, ISP 265, local network 263 and communication interface 261.
- the received code may be executed by processor 254 as the code is received, and/or stored in mass storage 258 or other non-volatile storage for later execution. In this manner, computer 250 may obtain application code in the form of a carrier wave.
- Application code may be embodied in any form of computer program product.
- a computer program product comprises a medium configured to store or transport computer readable code or data, or in which computer readable code or data may be embedded.
- Some examples of computer program products are CD- ROM disks, ROM cards, floppy disks, magnetic tapes, computer hard drives, servers on a network, and carrier waves.
- a central computing resource is used and the user display resource is distributed (e.g., a virtual desktop architecture)
- specialized video processors may be located between the network where data is available and the interconnect that connects the distributed displays to the central computing resources (e.g., services).
- video processing and hardware requirements associated with a receiver may be minimized by specifying a single video protocol for transmission of video data between transmitters and receivers on a network.
- the protocol may specify a color format that allows for high video quality and minimizes the complexity of the receiver.
- Transmitters may be equipped with transformation mechanisms that provide for conversion of video data into the designated protocol as needed.
- FIG. 5 illustrates a multimedia system in accordance with the present invention.
- Server 320 which may be a general purpose computer described above or any other suitable servers, receives media data from various media sources such as, but are not limited to, encoded media storage 318, encoded receiver 302, compressed video conference data source 304, decoded receiver 306 and hardwired data storage/receiver 308.
- Media data received from the media sources e.g., encoded media storage 318, encoded receiver 302 or compressed video conference data source 304, may be compressed or encoded.
- Compression reduces the number of binary bits necessary to represent the information contained within the data. Since every bit incurs a cost when being transmitted or stored, compression reduces cost, especially for multimedia applications which involve large amounts of data.
- compression techniques for example, Huffman method, Dictionary Approaches, Adaptive Coding, Run-Length Encoding method, Quadtree Compression method, Moving Pictures Experts Group (MPEG), etc.
- Compression may be performed by, e.g., a Coder- Decoder (codec) which may be a hardware or software that converts analog sound, speech or video to digital code (analog to digital) and vice versa (digital to analog).
- Hardware codecs (chips) may be built into device such as digital telephones and video-conferencing stations.
- Software codecs may be used to record and play audio and video over a network utilizing the CPU in a server for processing.
- Encoding may be a procedure to compress data of multimedia resources such as audio, video, or graphics files for efficient storage and transmission purpose. For example, encoding may compress high-bandwidth media signals to low-bandwidth signals. The compression then allows for the real-time transmission of media clips via the Internet.
- compress is used interchangeably with the term “encode.”
- decompress is used interchangeably with the term “decode.”
- any suitable data format may be used.
- decompressor 312 reverses the compression process and place the compressed data into a format for playback.
- Decompressor 312 may be a hardware or a software device that decompresses data and may be configured to have capabilities for processing various forms of compression.
- decompressor 312 may be an application-specific hardware or a general purpose computer.
- Decompressor 312 may be a stand-alone unit or may be a function provided by server 320.
- Media storage 322 may be a semi-permanent or permanent holding place for data, for example, magnetic disks, optical disks or magnetic tapes.
- Semi-permanent or permanent storage may be more economical for applications where small content is to be shown at multiple locations, for example, a standard video clip a few minutes in length to be shown at remotely installed kiosks.
- the content may be decoded once and stored at a server.
- the individual kiosk can then access the decoded content at the server. This configuration effectively eliminates the need for storage and decoding resources at each kiosk and since the video clip has a predefined size, a fixed-sized storage may be utilized.
- media storage 322 may be volatile and reusable, for example, a random access memory (RAM).
- content of media storage 322 may be updated using a least recently used (LRU) algorithm. For example, when data exceeds the storage size limit, the least recently accessed data is thrown away and new data stored the storage. By using this scheme, the items that are most frequently accessed by the users tend to stay in the media storage. Since the media storage does not need to store the entire content, the media storage may be sized to obtain maximum efficiency. For example, the size of decoded media storage 322 may be adjusted to store just a few minutes of content that are most frequently accessed. In another embodiment, for example, in the case of a live feed, media storage 322 may be updated based on first-in-first-out scheme, e.g., new data replaces the oldest data in the storage.
- decoded media storage 322 may be used as a data source, independent of the original media source.
- cache may be provided in the media controller units 332, 334, 336 and 338 to enhance the capacity of the central decoded media storage 322.
- decoded media storage can be hierarchical.
- better coverage, faster-than-realtime decoding or smaller storage caches may be provided. For example, if there are more decoding resources available than required for the workload, smaller storage caches may be used.
- Media controller units e.g., MCUs 332, 334, 336 and 338, may be controllers or chips that process any combination of audio, video, graphics, fax and modem operations.
- Media controller units via a storage management unit 323 associated with media storage 322, request particular media segments for display from the decoded media storage 322.
- Storage management unit 323 takes requests to play media data from media controllers 332, 334, 336 and 338 and makes sure that the requested decoded/decompressed media exists in the decoded media storage 322. Storage management unit 323 then directs the stored data to the appropriate media controllers 332, 334, 336 and 338 that are requesting the data. Storage management unit 323 may be implemented in software or hardware.
- storage management unit 323 produces media control events to e.g., encoded media storage 318 and bulk decoder 312 to produce requested decoded data.
- media controller 332, 334, 336 or 338 may search the encoded media storage 318, for example, by backing up to the beginning of the media, advancing to the end of the media, or playing backwards, forwards and at multiple speeds.
- control of the incoming data and bulk decoder 312 may be restricted because storage management unit 323 may be continuously accepting new data to be placed in the decoded media storage 322 and erasing old data when new data fills decoded media storage 322.
- user media controllers 332, 334, 336 and 338 may only be able to go as far back as the size of the decoded media storage 322 and forward as far as the current real time.
- decoded media stored in decoded media storage 322 may be displayed on a user display, e.g., user display 342, 344 or 346.
- data stored in decoded media storage 322 may be archived into a media archive unit 348.
- Media archive unit 348 may be any suitable media storage. Other types of media dispositions may be used in addition to viewing and archiving.
- the amount of multimedia resources may be decreased and their utilization optimized.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2001296944A AU2001296944A1 (en) | 2000-09-29 | 2001-09-28 | Reusing decoded multimedia data for multiple users |
GB0307244A GB2385966A (en) | 2000-09-29 | 2001-09-28 | Reusing decoded multimedia data for multiple users |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US67593900A | 2000-09-29 | 2000-09-29 | |
US09/675,939 | 2000-09-29 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2002028085A2 true WO2002028085A2 (en) | 2002-04-04 |
WO2002028085A3 WO2002028085A3 (en) | 2002-06-06 |
WO2002028085A9 WO2002028085A9 (en) | 2003-02-13 |
Family
ID=24712565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/042401 WO2002028085A2 (en) | 2000-09-29 | 2001-09-28 | Reusing decoded multimedia data for multiple users |
Country Status (3)
Country | Link |
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AU (1) | AU2001296944A1 (en) |
GB (1) | GB2385966A (en) |
WO (1) | WO2002028085A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7363363B2 (en) | 2002-05-17 | 2008-04-22 | Xds, Inc. | System and method for provisioning universal stateless digital and computing services |
CN101720036B (en) * | 2009-12-15 | 2011-11-16 | 青岛海信宽带多媒体技术有限公司 | System for distributing DVB data to multiple users |
CN110933470A (en) * | 2019-11-29 | 2020-03-27 | 杭州当虹科技股份有限公司 | Video data sharing method |
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US5790935A (en) * | 1996-01-30 | 1998-08-04 | Hughes Aircraft Company | Virtual on-demand digital information delivery system and method |
US6012091A (en) * | 1997-06-30 | 2000-01-04 | At&T Corporation | Video telecommunications server and method of providing video fast forward and reverse |
US6016507A (en) * | 1997-11-21 | 2000-01-18 | International Business Machines Corporation | Method and apparatus for deleting a portion of a video or audio file from data storage prior to completion of broadcast or presentation |
US6108695A (en) * | 1997-06-24 | 2000-08-22 | Sun Microsystems, Inc. | Method and apparatus for providing analog output and managing channels on a multiple channel digital media server |
-
2001
- 2001-09-28 AU AU2001296944A patent/AU2001296944A1/en not_active Abandoned
- 2001-09-28 WO PCT/US2001/042401 patent/WO2002028085A2/en active Application Filing
- 2001-09-28 GB GB0307244A patent/GB2385966A/en not_active Withdrawn
Patent Citations (4)
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US5790935A (en) * | 1996-01-30 | 1998-08-04 | Hughes Aircraft Company | Virtual on-demand digital information delivery system and method |
US6108695A (en) * | 1997-06-24 | 2000-08-22 | Sun Microsystems, Inc. | Method and apparatus for providing analog output and managing channels on a multiple channel digital media server |
US6012091A (en) * | 1997-06-30 | 2000-01-04 | At&T Corporation | Video telecommunications server and method of providing video fast forward and reverse |
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CHIU M Y M ET AL: "PARTIAL VIDEO SEQUENCE CACHING SCHEME FOR VOD SYSTEMS WITH HETEROGENEOUS CLIENTS" IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, IEEE INC. NEW YORK, US, vol. 45, no. 1, 1 February 1998 (1998-02-01), pages 44-51, XP000735203 ISSN: 0278-0046 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US7363363B2 (en) | 2002-05-17 | 2008-04-22 | Xds, Inc. | System and method for provisioning universal stateless digital and computing services |
US7783701B2 (en) | 2002-05-17 | 2010-08-24 | Simtone Corporation | System and method for provisioning universal stateless digital and computing services |
CN101720036B (en) * | 2009-12-15 | 2011-11-16 | 青岛海信宽带多媒体技术有限公司 | System for distributing DVB data to multiple users |
CN110933470A (en) * | 2019-11-29 | 2020-03-27 | 杭州当虹科技股份有限公司 | Video data sharing method |
Also Published As
Publication number | Publication date |
---|---|
AU2001296944A1 (en) | 2002-04-08 |
GB0307244D0 (en) | 2003-04-30 |
GB2385966A (en) | 2003-09-03 |
WO2002028085A9 (en) | 2003-02-13 |
WO2002028085A3 (en) | 2002-06-06 |
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