# References

## Related documents

| Title | Number |
| --- | --- |
| **Qualcomm Technologies, Inc.** |  |
| [*Qualcomm Intelligent Multimedia SDK (IM SDK) Reference*](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-50/overview.html) | 80-70020-50 |
| [*Qualcomm Intelligent Multimedia SDK (IM SDK) Quick Start Guide*](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-51/introduction.html) | 80-70020-51 |
| [*Qualcomm Linux Build Guide*](https://docs.qualcomm.com/bundle/publicresource/topics/80-70020-254/introduction.html) | 80-70020-254 |
| **Resources** |  |
| [https://github.com/quic/v4l-video-test-app](https://github.com/quic/v4l-video-test-app) |  |
| [https://www.kernel.org/doc/html/v4.9/media/uapi/v4l/v4l2.html](https://www.kernel.org/doc/html/v4.9/media/uapi/v4l/v4l2.html) |  |
| [https://www.kernel.org/doc/html/v4.9/media/uapi/v4l/user-func.html](https://www.kernel.org/doc/html/v4.9/media/uapi/v4l/user-func.html) |  |
| [https://www.kernel.org/doc/html/v5.5/media/uapi/v4l/ext-ctrls-codec.html](https://www.kernel.org/doc/html/v5.5/media/uapi/v4l/ext-ctrls-codec.html) |  |
| [https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-decoder.html](https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-decoder.html) |  |
| [https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-encoder.html](https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-encoder.html) |  |

## Acronyms and terms

| Acronym or term | Definition |
| --- | --- |
| ASO | Arbitrary slice ordering |
| CBR | Constant bit rate |
| FD | File descriptor |
| FMO | Flexible macroblock order |
| GOB | Group of blocks |
| GOP | Group of pictures |
| GPU | Graphics processing unit |
| HEVC | High efficiency video coding |
| HFI | Host firmware interface |
| LTR | Long-term reference |
| MBR | Maximum bit rate |
| QP | Quantization parameter |
| RS | Redundant slices |
| STR | Short-term reference |
| VBR | Variable bit rate |
| VPU | Video processing unit |
| VT | Video telephony |
| YUV | Luminance, bandwidth, chrominance, also known as YCbCr and YPbPr |

Last Published: Jul 02, 2025

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