johnlin2004_6的博客

1. Introduction 1.1 Document Structure 1.1.1. Requirements by Device Type 1.1.2. Requirement ID 1.1.3. Requirement ID in Section 2 2. Device Types 2.1 Device Configurations 2.2. Handheld Requirements 2.2.1. Hardware 2.2.2. Multimedia 2.2.3. Software 2.2.4. Performance and Power 2.2.5. Security Model 2.3. Television Requirements 2.3.1. Hardware 2.3.2. Multimedia 2.3.3. Software 2.3.4. Performance and Power 2.4. Watch Requirements 2.4.1. Hardware 2.4.2. Multimedia 2.4.3. Software 2.4.4. Performance and Power 2.5. Automotive Requirements 2.5.1. Hardware 2.5.2. Multimedia 2.5.3. Software 2.5.4. Performance and Power 2.5.5. Security Model 2.6. Tablet Requirements 2.4.1. Hardware 3. Software 3.1. Managed API Compatibility 3.1.1. Android Extensions 3.1.2. Android Library 3.2. Soft API Compatibility 3.2.1. Permissions 3.2.2. Build Parameters 3.2.3. Intent Compatibility 3.2.3.1. Core Application Intents 3.2.3.2. Intent Resolution 3.2.3.3. Intent Namespaces 3.2.3.4. Broadcast Intents 3.2.3.5. Default App Settings 3.2.4. Activities on secondary displays 3.3. Native API Compatibility 3.3.1. Application Binary Interfaces 3.3.2. 32-bit ARM Native Code Compatibility 3.4. Web Compatibility 3.4.1. WebView Compatibility 3.4.2. Browser Compatibility 3.5. API Behavioral Compatibility 3.5.1. Background Restriction 3.6. API Namespaces 3.7. Runtime Compatibility 3.8. User Interface Compatibility 3.8.1. Launcher (Home Screen) 3.8.2. Widgets 3.8.3. Notifications 3.8.3.1. Presentation of Notifications 3.8.3.2. Notification Listener Service 3.8.3.3. DND (Do not Disturb) 3.8.4. Search 3.8.5. Alerts and Toasts 3.8.6. Themes 3.8.7. Live Wallpapers 3.8.8. Activity Switching 3.8.9. Input Management 3.8.10. Lock Screen Media Control 3.8.11. Screen savers (previously Dreams) 3.8.12. Location 3.8.13. Unicode and Font 3.8.14. Multi-windows 3.8.15. Display Cutout 3.9. Device Administration 3.9.1 Device Provisioning 3.9.1.1 Device owner provisioning 3.9.1.2 Managed profile provisioning 3.9.2 Managed Profile Support 3.9.3 Managed User Support 3.10. Accessibility 3.11. Text-to-Speech 3.12. TV Input Framework 3.13. Quick Settings 3.14. Media UI 3.15. Instant Apps 3.16. Companion Device Pairing 3.17. Heavyweight Apps 4. Application Packaging Compatibility 5. Multimedia Compatibility 5.1. Media Codecs 5.1.1. Audio Encoding 5.1.2. Audio Decoding 5.1.3. Audio Codecs Details 5.1.4. Image Encoding 5.1.5. Image Decoding 5.1.6. Image Codecs Details 5.1.7. Video Codecs 5.1.8. Video Codecs List 5.2. Video Encoding 5.2.1. H.263 5.2.2. H-264 5.2.3. VP8 5.2.4. VP9 5.3. Video Decoding 5.3.1. MPEG-2 5.3.2. H.263 5.3.3. MPEG-4 5.3.4. H.264 5.3.5. H.265 (HEVC) 5.3.6. VP8 5.3.7. VP9 5.4. Audio Recording 5.4.1. Raw Audio Capture 5.4.2. Capture for Voice Recognition 5.4.3. Capture for Rerouting of Playback 5.5. Audio Playback 5.5.1. Raw Audio Playback 5.5.2. Audio Effects 5.5.3. Audio Output Volume 5.6. Audio Latency 5.7. Network Protocols 5.8. Secure Media 5.9. Musical Instrument Digital Interface (MIDI) 5.10. Professional Audio 5.11. Capture for Unprocessed 6. Developer Tools and Options Compatibility 6.1. Developer Tools 6.2. Developer Options 7. Hardware Compatibility 7.1. Display and Graphics 7.1.1. Screen Configuration 7.1.1.1. Screen Size and Shape 7.1.1.2. Screen Aspect Ratio 7.1.1.3. Screen Density 7.1.2. Display Metrics

1. Introduction 1.1 Document Structure 1.1.1. Requirements by Device Type 1.1.2. Requirement ID 1.1.3. Requirement ID in Section 2 2. Device Types 2.1 Device Configurations 2.2. Handheld Requirements 2.2.1. Hardware 2.2.2. Multimedia 2.2.3. Software 2.2.4. Performance and Power 2.2.5. Security Model 2.3. Television Requirements 2.3.1. Hardware 2.3.2. Multimedia 2.3.3. Software 2.2.4. Performance and Power 2.4. Watch Requirements 2.4.1. Hardware 2.4.2. Multimedia 2.4.3. Software 2.5. Automotive Requirements 2.5.1. Hardware 2.5.2. Multimedia 2.5.3. Software 2.2.4. Performance and Power 2.2.5. Security Model 2.6. Tablet Requirements 2.4.1. Hardware 3. Software 3.1. Managed API Compatibility 3.1.1. Android Extensions 3.2. Soft API Compatibility 3.2.1. Permissions 3.2.2. Build Parameters 3.2.3. Intent Compatibility 3.2.3.1. Core Application Intents 3.2.3.2. Intent Resolution 3.2.3.3. Intent Namespaces 3.2.3.4. Broadcast Intents 3.2.3.5. Default App Settings 3.2.4. Activities on secondary displays 3.3. Native API Compatibility 3.3.1. Application Binary Interfaces 3.3.2. 32-bit ARM Native Code Compatibility 3.4. Web Compatibility 3.4.1. WebView Compatibility 3.4.2. Browser Compatibility 3.5. API Behavioral Compatibility 3.6. API Namespaces 3.7. Runtime Compatibility 3.8. User Interface Compatibility 3.8.1. Launcher (Home Screen) 3.8.2. Widgets 3.8.3. Notifications 3.8.3.1. Presentation of Notifications 3.8.3.2. Notification Listener Service 3.8.3.3. DND (Do not Disturb) 3.8.4. Search 3.8.5. Alerts and Toasts 3.8.6. Themes 3.8.7. Live Wallpapers 3.8.8. Activity Switching 3.8.9. Input Management 3.8.10. Lock Screen Media Control 3.8.11. Screen savers (previously Dreams) 3.8.12. Location 3.8.13. Unicode and Font 3.8.14. Multi-windows 3.9. Device Administration 3.9.1 Device Provisioning 3.9.1.1 Device owner provisioning 3.9.1.2 Managed profile provisioning 3.9.2 Managed Profile Support 3.10. Accessibility 3.11. Text-to-Speech 3.12. TV Input Framework 3.12.1. TV App 3.12.1.1. Electronic Program Guide 3.12.1.2. Navigation 3.12.1.3. TV input app linking 3.12.1.4. Time shifting 3.12.1.5. TV recording 3.13. Quick Settings 3.14. Media UI 3.15. Instant Apps 3.16. Companion Device Pairing 4. Application Packaging Compatibility 5. Multimedia Compatibility 5.1. Media Codecs 5.1.1. Audio Encoding 5.1.2. Audio Decoding 5.1.3. Audio Codecs Details 5.1.4. Image Encoding 5.1.5. Image Decoding 5.1.6. Image Codecs Details 5.1.7. Video Codecs 5.1.8. Video Codecs List 5.2. Video Encoding 5.2.1. H.263 5.2.2. H-264 5.2.3. VP8 5.2.4. VP9 5.3. Video Decoding 5.3.1. MPEG-2 5.3.2. H.263 5.3.3. MPEG-4 5.3.4. H.264 5.3.5. H.265 (HEVC) 5.3.6. VP8 5.3.7. VP9 5.4. Audio Recording 5.4.1. Raw Audio Capture 5.4.2. Capture for Voice Recognition 5.4.3. Capture for Rerouting of Playback 5.5. Audio Playback 5.5.1. Raw Audio Playback 5.5.2. Audio Effects 5.5.3. Audio Output Volume 5.6. Audio Latency 5.7. Network Protocols 5.8. Secure Media 5.9. Musical Instrument Digital Interface (MIDI) 5.10. Professional Audio 5.11. Capture for Unprocessed 6. Developer Tools and Options Compatibility 6.1. Developer Tools 6.2. Developer Options 7. Hardware Compatibility 7.1. Display and Graphics 7.1.1. Screen Configuration 7.1.1.1. Screen Size 7.1.1.2. Screen Aspect Ratio 7.1.1.3. Screen Density 7.1.2. Display Metrics 7.1.3. Screen Orientation 7.1.4. 2D and 3D Graphics Acceleration 7.1.4.1 OpenGL ES 7.1.4.2 Vulkan 7.1.4.3 RenderScript 7.1.4.4 2D Graphics Acceleration 7.1.4.5 Wide-gamut Displays 7.1.5. Legacy Application Compatibility Mode 7.1.6. Screen Technology 7.1.7. Secondary Displays 7.2. Input Devices 7.2.1. Keyboard 7.2.2. Non-touch Navigation 7.2.3. Navigation Keys 7.2.4. Touchscreen Input 7.2.5. Fake Touch Input 7.2.6. Game Controller Support 7.2.6.1. Button Mappings 7.2.7. Remote Control 7.3. Sensors 7.3.1. Accelerometer 7.3.2. Magnetometer 7.3.3. GPS 7.3.4. Gyroscope 7.3.5. Barometer 7.3.6. Thermometer 7.3.7. Photometer 7.3.8. Proximity Sensor 7.3.9. High Fidelity Sensors 7.3.10. Fingerprint Sensor 7.3.11. Android Automotive-only sensors 7.3.11.1. Current Gear 7.3.11.2. Day Night Mode 7.3.11.3. Driving Status 7.3.11.4. Wheel Speed 7.3.12. Pose Sensor 7.4. Data Connectivity 7.4.1. Telephony 7.4.1.1. Number Blocking Compatibility 7.4.2. IEEE 802.11 (Wi-Fi) 7.4.2.1. Wi-Fi Direct 7.4.2.2. Wi-Fi Tunneled Direct Link Setup 7.4.2.3. Wi-Fi Aware 7.4.2.4. Wi-Fi Passpoint 7.4.3. Bluetooth 7.4.4. Near-Field Communications 7.4.5. Minimum Network Capability 7.4.6. Sync Settings 7.4.7. Data Saver 7.5. Cameras 7.5.1. Rear-Facing Camera 7.5.2. Front-Facing Camera 7.5.3. External Camera 7.5.4. Camera API Behavior 7.5.5. Camera Orientation 7.6. Memory and Storage 7.6.1. Minimum Memory and Storage 7.6.2. Application Shared Storage 7.6.3. Adoptable Storage 7.7. USB 7.7.1. USB peripheral mode 7.7.2. USB host mode 7.8. Audio 7.8.1. Microphone 7.8.2. Audio Output 7.8.2.1. Analog Audio Ports 7.8.3. Near-Ultrasound 7.9. Virtual Reality 7.9.1. Virtual Reality Mode 7.9.2. Virtual Reality High Performance 8. Performance and Power 8.1. User Experience Consistency 8.2. File I/O Access Performance 8.3. Power-Saving Modes 8.4. Power Consumption Accounting 8.5. Consistent Performance 9. Security Model Compatibility 9.1. Permissions 9.2. UID and Process Isolation 9.3. Filesystem Permissions 9.4. Alternate Execution Environments 9.5. Multi-User Support 9.6. Premium SMS Warning 9.7. Kernel Security Features 9.8. Privacy 9.8.1. Usage History 9.8.2. Recording 9.8.3. Connectivity 9.8.4. Network Traffic 9.9. Data Storage Encryption 9.9.1. Direct Boot 9.9.2. File Based Encryption 9.9.3. Full Disk Encryption 9.10. Device Integrity 9.11. Keys and Credentials 9.11.1. Secure Lock Screen 9.12. Data Deletion 9.13. Safe Boot Mode 9.14. Automotive Vehicle System Isolation 10. Software Compatibility Testing 10.1. Compatibility Test Suite 10.2. CTS Verifier 11. Updatable Software 12. Document Changelog 12.1. Changelog Viewing Tips 13. Contact Us

1. Introduction 2. Device Types 2.1 Device Configurations 3. Software 3.1. Managed API Compatibility 3.1.1. Android Extensions 3.2. Soft API Compatibility 3.2.1. Permissions 3.2.2. Build Parameters 3.2.3. Intent Compatibility 3.2.3.1. Core Application Intents 3.2.3.2. Intent Resolution 3.2.3.3. Intent Namespaces 3.2.3.4. Broadcast Intents 3.2.3.5. Default App Settings 3.3. Native API Compatibility 3.3.1. Application Binary Interfaces 3.3.1.1. Graphic Libraries 3.3.2. 32-bit ARM Native Code Compatibility 3.4. Web Compatibility 3.4.1. WebView Compatibility 3.4.2. Browser Compatibility 3.5. API Behavioral Compatibility 3.6. API Namespaces 3.7. Runtime Compatibility 3.8. User Interface Compatibility ...

Summary of key features  Single speaker amplifier; add second for stereo support  Flexible solution for configuration, cost, and layout optimizations  Supports digital SoundWire and analog audio inputs  Current and voltage sensing for speaker protection  Up to 2 W (WSA8810) and 4 W (WSA8815) audio output power into 8   WSA8810 and WSA8815 support stereo application  Temperature sensor for IC over-temp protection and speaker protection  On-chip multilevel boost SMPS for high voltage, high power applications; bypass mode for lower power  Single CMOS die in the 2.24 × 2.63 × 0.55 mm 35-pad wafer-level nanoscale package (35 WLNSP)

The WCD9335 is a stand-alone high fidelity (hi-fi) audio codec IC that supports the Qualcomm Technologies, Inc. (QTI) multimedia solutions, including the APQ8096SGE chipset. The key WCD9335 functions include the following:  Serial low-power interchip media bus (SLIMbus) for access to all on-chip digital audio channels; inter-IC sound (I2S) accesses fewer paths, but maintains compatibility with earlier integrated circuits (ICs).  SoundWire interface for driving WSA8810 or WSA8815 speaker amplifiers  Six analog input ports and seven analog output ports  Six audio analog-to-digital converters (ADCs) and seven digital-to-analog converters (DACs)  Six digital microphone inputs (three clock/data pairs)  Multibutton headset control (MBHC) for smart accessory detection  Digital processing includes the following:  Microphone activity detection (MAD) detecting audio, ultrasound, and beacon activity  Qualcomm® Voice Activation subsystem  Active noise cancellation (ANC)  Integrated analog support reduces bill of materials (BOM) and area:  Microphone bias outputs (x4)

Basics of Audio Perception • Basics of Audio Compression • MPEG Audio – MPEG-1 Audio – MPEG-2 Audio • AC-3 Audio • A/V Synchronization & Splicing • References

Introduction – Video Basics – Human Vision Basics – Colorimetry Basics – Video Compression Basics • MPEG-1 Video • MPEG-2 Video • Rate Control, VBV, Stat Mux • Practicing the Art of MPEG • ATSC Video Constraints and Extensions

MPEG-2 Systems Overview (13818-1) • Packet Concepts • MPEG-2 Program Streams • MPEG-2 Transport Streams • Timing Mechanisms • A/V Synchronization • Transport System Target Decoder (T-STD) • MPEG Bitstream Syntax and Table Structure • Program Specific Information • DVB and ATSC Transport Formats

I.1 Purpose I.1.1 Coding Parameters I.2 Overview of the Algorithm I.2.1 Temporal Processing I.2.2 Motion Representation - Macroblocks I.2.3 Spatial Redundancy Reduction I.3 Encoding I.4 Decoding I.5 Structure of the Coded video bitstream I.6 Features Supported by the Algorithm

I.1 Multiplex-wide Operations (Pack layer) I.2 Individual Stream Operations (Packet Layer) I.2.1 Demultiplexing I.2.2 Synchronization I.2.3 Relation to Compression Layer I.3 System Reference Decoder