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REAL PLAYER 影音播放系統

REAL PLAYER 影音播放系統. 在網上收聽收看實時 Audio 、 Video 和 Flash 的最佳工具。用 RealPlayer 可欣賞網上在線音頻和視頻資料。 帶有目標按紐，只需單擊滑鼠就可收聽新聞和娛樂資訊；近乎 CD 一樣的音頻效果 全屏播放圖像功能（只適用於高帶寬連接情況）。. 基本功能介紹. 可播放 50 種以上的檔案類型，包括： Windows Media 、 Quicktime 和 DVD 包括進階 CD 燒錄功能 - 可建立自定 MP3 CD 具有頂級音訊與視訊控制功能 - 圖形等化器 、淡出淡入 、亮度與對比控制

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REAL PLAYER 影音播放系統

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  1. REAL PLAYER影音播放系統

  2. 在網上收聽收看實時 Audio、Video 和 Flash 的最佳工具。用 RealPlayer 可欣賞網上在線音頻和視頻資料。 • 帶有目標按紐，只需單擊滑鼠就可收聽新聞和娛樂資訊；近乎CD一樣的音頻效果 • 全屏播放圖像功能（只適用於高帶寬連接情況）。

  3. 基本功能介紹 • 可播放50種以上的檔案類型，包括：Windows Media 、Quicktime 和 DVD • 包括進階CD燒錄功能 - 可建立自定 MP3 CD • 具有頂級音訊與視訊控制功能 - 圖形等化器 、淡出淡入 、亮度與對比控制 • 使用工具列模式可最大化桌面空間 • 可存取全世界3，000多家廣播電台！

  4. 其他功能包括：內容頻道，自動升級功能，SmartStream 技術消除了再次緩衝，尋找媒介鏈結，支援 MP3 格式等。

  5. STREAM串流概念介紹 • 將一連串的影像壓縮後，經過網際網路分段傳送資料，在網路上即時傳輸影音以供觀賞的一種技術與過程；串流傳輸可傳送現場影音或預存於伺服器上的影片，當觀看者在收看這些影音檔時，影音資料在送達觀賞者的電腦後立即由特定播放軟體播放 (如 Windows Media Player, Real Player,或 QuickTime Player)。

  6. ◎串流格式之優缺點比較優點 • 即時播放 • 影片資料不易被複製 • 不佔硬碟空間 • 收看者即時隨點隨看

  7. 缺點 • 傳輸品質不佳、畫面失真 為配合數據機或區域網連線的大小，必須壓縮及放棄多餘的影像資料，造成顆粒狀或模糊影像及間斷之聲音

  8. RealVideo 10 Compression • KEY FEATURES OF REALVIDEO 10 • THE REALVIDEO 10 COMPRESSION ALGORITHM • THE REALVIDEO 10 ENCODER

  9. Bitrate • Very often used when speaking of video or audio quality -- defines how much physical space one second of audio or video takes in bits (note: not in bytes)

  10. KEY FEATURES OF REALVIDEO 10 Broad reach — Compatible with all RealVideo 9 decoders • No RealOne™ Player update is needed to play RealVideo 10 content • Same system, processor requirements for playback as the previous generation RealVideo 9 • Also plays back in RealPlayer 10

  11. Unparalleled quality — State-of-the-art video at all bit rates • Same Quality at 30% lower bitrate than RealVideo 9 • Same Quality at 80% lower bitrate than MPEG-2 • Same Quality at 75% lower bitrate than HDTV • Same Quality at 45% lower bitrate than MPEG-4 (ASP) • Same Quality at 30% lower bitrate than WMV 9 • Same Quality at 15% lower bitrate than H.264

  12. Cross Platform — Available for playback in multiple environments • Microsoft Windows, Intel Processor (MMXTM, SSETM, SSE2TM) • Linux, Intel Processor (MMXTM, SSETM, SSE2TM) • Mac OS, PowerPC Processor (AltiVecTM) • WinCE, ARM Processor (ARMv4, StrongARM, XScaleTM) • Symbian, ARM Processor (ARMv4, StrongARM, XScaleTM) • MIPS Processor (NEC vr5500)

  13. Any Device — Extends Internet media across the spectrum of devices from mobile to TV, PC, HDTV and beyond. • HDTV Ready — supports all HD formats and resolutions including 720p and 1080i • Interlaced Support — The RealVideo 10 bitstream can carry 60 fields per second interlaced content

  14. THE REALVIDEO 10 COMPRESSION ALGORITHM • Highly accurate motion modeling • Proprietary spatial pixel prediction methods • Multi-resolution residual analysis/synthesis stage • Context adaptive entropy coding • Psycho-visually tuned segmentation and filtering schemes • Rate-Distortion optimized encoding algorithms • Two-Pass encoding

  15. The RealVideo 10 Decoder

  16. THE REALVIDEO 10 ENCODER To accommodate these applications the RealVideo 10 encoder supports the following encoding modes: • Constant Bitrate • Variable Bitrate (with a possible maximum constrained bitrate) • Quality-Based Encoding (with a possible maximum constrained bitrate)

  17. Real player usage • Education • Enterprise • Government • Service Providers • Resource Library

  18. Education • Universities, colleges, local school districts and other educators are discovering easy-to-use content creation, delivery and playback products and services from Real to communicate with employees, other institutions and students.

  19. Case Study • Thomas Telford School has developed a well-respected online curriculum employing digital media technology from Real. • Watch Case Study

  20. Enterprise • Financial services, health care, high-tech and other enterprises are improving communication, increasing productivity and reducing costs with Real's complete universal media delivery system.

  21. Case study • MasterCard International saves over $10,000 per company meeting using streaming media technology from Real. Watch this streaming video case study to find out how. • Watch Case Study

  22. Government • Federal, state and local government agencies are training employees, and communicating with constituents with Real's scalable and secure media delivery system.

  23. Resource Library • To help professionals responsible for streaming media initiatives make informed decisions, we have gathered together a library of resources that includes case studies, application demos, product literature, online seminars and more.

  24. Realvideo10Quality compare the bitrates required to achieve the same level of fidelity using RealVideo 10 and other popular video formats.

  25. Comparison • Fidelity(Peak Signal-to-Noise Ratio, PSNR) • Bitrate • Encoder Speed

  26. RealVideo 10 provides the same, or better, visual quality using 30%lower bitrate. (Images from the “Foreman” clip, encoded at 352x288)

  27. Low action

  28. Moderate action

  29. RealVideo 10 Scalability

  30. The Helix™ platform (Producer, Server and Client) features RealNetworks’ SureStream™ technology.

  31. Using the Helix Producer, multiple target bitrates can be selected and audio and video streams appropriate for those target bitrates are encoded.

  32. When streamed over a network, the RealOne™ Player and Helix Universal Server communicate the appropriate audio and video streams to be transmitted.

  33. All of the typical means of scalability (spatial, temporal and quality) are utilized in our SureStream technology.

  34. When selecting multiple target bitrates for the encoding of a piece of content, each bitrate selection represents an independently decodable stream.

  35. Each of these streams may be encoded at different resolutions, frame rates and image fidelities. • And because there are no dependencies between streams, each stream can be encoded at a frame size, frame rate and quality level optimized for that bitrate.

  36. RealVideo 10 Error Resiliency

  37. Error resiliency is a major component of our media delivery platform. Error resiliency features implemented in our platform include:

  38. 1.The ability to dynamically set FEC packet insertion rates at nearly every stage of the delivery network, from Producer to Server, Server to Server, Server to Proxies, Proxies to Clients, etc.

  39. 2.Automatic retransmission requests allow clients to resend data packets that are lost.

  40. 3.The ability to enable error resiliency modes in our RealVideo family of codecs.

  41. RealVideo 10 Decoder Performance

  42. Since RealVideo 10 is designed for use on a wide variety of clients with very different performance capabilities, RealVideo 10 has built-in CPU scalability in both the encoder and decoder that allows the faster processing of video if needed.

  43. CPU USAGE • The encoder/decoder complexity is asymmetric with the difference in complexity between the encoder and decoder near a factor of 3-5 times under normal (default) encoder and decoder operation.

  44. 1.CIF or QCIF for dial-up connections –For playback of typical content for dial-up speeds (176 x 132), a 200 MHz Pentium II (or better) is recommended. • CIF是352*288大小的影像 • QCIF(176*144) • SIF 大小(240x160 )

  45. 2.Full Screen –For playback of 640 x 480 video at full 24 fps (for film) or 30 fps (for video), a 750 MHz Pentium III (or better) is recommended.

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