Documentation

Performance Specifications

This section describes only the performance specifications of Ascend AI Processors of each product, which may differ based on the memory and CPU configurations of the respective product. For details about the product performance specifications, see the official descriptions at the Ascend community.

This section uses a single Ascend AI Processor as an example to describe the performance indicators in basic scenarios. The performance indicators of other resolutions can be estimated in the same way.

In the following table, one channel corresponds to one thread, 720p indicates a resolution of 1280 x 720 pixels, 1080p indicates a resolution of 1920 x 1080 pixels, and 4K indicates a resolution of 3840 x 2160 pixels.

Performance Specifications (Atlas inference products)

The following performance data is based on the host server configuration: Intel(R) Xeon(R) CPU E5-2680 v4@2.40 GHz as the CPU frequency, with 14 CPU cores.

Table 1 Performance specifications of the Ascend AI Processor on the Atlas inference products

Scenario

Total Frame Rate

n-channel 720p (1 ≤ n ≤ 12)

n * 480fps

NOTE:

For Atlas 300V video analysis cards, when 1 < n ≤ 12, the total frame rate is n x 400 FPS.

n-channel 720p (n > 12)

5760 FPS

NOTE:

For Atlas 300V video analysis cards, when n > 12, the total frame rate is 4800 FPS.

n-channel 1080p (1 ≤ n ≤ 12)

n * 240fps

NOTE:

For Atlas 300V video analysis cards, when 1 < n ≤ 12, the total frame rate is n x 200 FPS.

n-channel 1080p (n > 12)

2880 FPS

NOTE:

For Atlas 300V video analysis cards, when n > 12, the total frame rate is 2400 FPS.

n-channel 4K (1 ≤ n ≤ 12)

n * 60fps

n-channel 4K (n > 12)

720 FPS
The following table describes the memory usage of each VDEC channel in typical scenarios. The memory usage is calculated as follows:
  • Buffer size for the input streams: input stream width x input stream height x 2.
  • Frame buffer size for the decoded images: 3 MB when resolution = 1080p. For other resolutions, convert the value proportionally.
  • TMV buffer size for the decoded images:
    • 0.5 MB for H.264 1080p input streams
    • 1 MB for H.265 1080p input streams.

    For other resolutions, convert the value proportionally.

  • Number of reference frames: Call acl.media.vdec_set_channel_desc_ref_frame_num to set the value.
  • Number of buffered frames after decoding: 2

Formula

Scenario

Memory Usage

6 MB + Buffer size for the input streams x 2 + (Frame buffer size for the decoded images + TMV buffer size for the decoded images) x (Number of reference frames + Number of buffered frames after decoding + 1)
  • Input stream format: H.264
  • Input stream resolution: 1080p
  • Buffer size for the input streams: 4 MB
  • Frame buffer size for the decoded images: 3 MB
  • TMV buffer size for the decoded images: 0.5 MB
  • Number of buffered frames after decoding: 2

52.5 MB (eight reference frames)

31.5 MB (two reference frames)
  • Input stream format: H.265
  • Input stream resolution: 1080p
  • Buffer size for the input streams: 4 MB
  • Frame buffer size for the decoded images: 3 MB
  • TMV buffer size for the decoded images: 1 MB
  • Number of buffered frames after decoding: 2

58 MB (eight reference frames)

34 MB (two reference frames)

Performance Specifications (Atlas training products)

Scenario

Total Frame Rate

n-channel 4-process 1080p (n ≤ 32)

n * 30 * 4fps

n-channel 4-process 4K (n ≤ 8)

n * 30 * 4fps

Performance Specifications (Atlas 200I/500 A2 inference products)

Table 2 Performance specifications of the Ascend AI Processor on the Atlas 200I/500 A2 inference products

Scenario

Total Frame Rate

n-channel 720p (1 ≤ n ≤ 4)

n * 600fps

n-channel 720p (n > 4)

2400 FPS

n-channel 1080p (1 ≤ n ≤ 4)

n * 300fps

n-channel 1080p (n > 4)

n x 1200 FPS

n-channel 4K (1 ≤ n ≤ 4)

n * 75fps

n-channel 4K (n > 4)

300 FPS
The following table describes the memory usage of each VDEC channel in typical scenarios. The memory usage is calculated as follows:
  • Buffer size for the input streams: input stream width x input stream height x 2.
  • Frame buffer size for the decoded images: 3 MB when resolution = 1080p. For other resolutions, convert the value proportionally.
  • TMV buffer size for the decoded images: 0.5 MB for H.264, 1080p input streams; 1 MB for H.265, 1080p input streams. For other resolutions, convert the value proportionally.
  • Number of reference frames: Call acl.media.vdec_set_channel_desc_ref_frame_num to set the value.
  • Number of buffered frames after decoding: 2

Formula

Scenario

Memory Usage

16 MB + Buffer size for the input streams x 2 + (Frame buffer size for the decoded images + TMV buffer size for the decoded images) x (Number of reference frames + Number of buffered frames after decoding + 1)
  • Input stream format: H.264
  • Input stream resolution: 1080p
  • Buffer size for the input streams: 4 MB
  • Frame buffer size for the decoded images: 3 MB
  • TMV buffer size for the decoded images: 0.5 MB
  • Number of buffered frames after decoding: 2

52.5 MB (eight reference frames)

31.5 MB (two reference frames)
  • Input stream format: H.265
  • Input stream resolution: 1080p
  • Buffer size for the input streams: 4 MB
  • Frame buffer size for the decoded images: 3 MB
  • TMV buffer size for the decoded images: 1 MB
  • Number of buffered frames after decoding: 2

58 MB (eight reference frames)

34 MB (two reference frames)

Performance Specifications (Atlas A2 training products/Atlas A2 inference products)

Table 3 Performance specifications of the Ascend AI Processor on the Atlas A2 training products/Atlas A2 inference products

Scenario

Total Frame Rate

n-channel 720p (1 ≤ n ≤ 2)

n * 480fps

n-channel 720p (n > 2)

960 FPS

n-channel 1080p (1 ≤ n ≤ 2)

n * 240fps

n-channel 1080p (n > 2)

480 FPS

n-channel 4K (1 ≤ n ≤ 2)

n * 60fps

n-channel 4K (n > 2)

120 FPS
The following table describes the memory usage of each VDEC channel in typical scenarios. The memory usage is calculated as follows:
  • Buffer size for the input streams: input stream width x input stream height x 2.
  • Frame buffer size for the decoded images: 3 MB when resolution = 1080p. For other resolutions, convert the value proportionally.
  • TMV buffer size for the decoded images:
    • 0.5 MB for H.264 1080p input streams
    • 1 MB for H.265 1080p input streams.

    For other resolutions, convert the value proportionally.

  • Number of reference frames: Call acl.media.vdec_set_channel_desc_ref_frame_num to set the value.
  • Number of buffered frames after decoding: 2

Formula

Scenario

Memory Usage

6 MB + Buffer size for the input streams x 2 + (Frame buffer size for the decoded images + TMV buffer size for the decoded images) x (Number of reference frames + Number of buffered frames after decoding + 1)
  • Input stream format: H.264
  • Input stream resolution: 1080p
  • Buffer size for the input streams: 4 MB
  • Frame buffer size for the decoded images: 3 MB
  • TMV buffer size for the decoded images: 0.5 MB
  • Number of buffered frames after decoding: 2

52.5 MB (eight reference frames)

31.5 MB (two reference frames)
  • Input stream format: H.265
  • Input stream resolution: 1080p
  • Buffer size for the input streams: 4 MB
  • Frame buffer size for the decoded images: 3 MB
  • TMV buffer size for the decoded images: 1 MB
  • Number of buffered frames after decoding: 2

58 MB (eight reference frames)

34 MB (two reference frames)
Parent topic: VDEC
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