CLOVA Speech overview
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CLOVA Speech overview
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Available in Classic and VPC
CLOVA Speech is a NAVER Cloud Platform service that provides quick and easy speech recognition services through CLOVA's Neural End-to-end Speech Transcriber (NEST) speech recognition technology. It provides APIs in RESTful form for speech-based features such as transcribing long audio/video files, creating voice notes, video subtitles, and managing call transcripts.
Note
CLOVA Speech service allows you to upload long audio/video files to check the speech recognition results. On the other hand, the CLOVA Speech Recognition (CSR) service is optimized for imperative speech recognition within one minute.
Common CLOVA Speech settings
The following describes commonly used request and response formats in CLOVA Speech APIs.
Request
The following describes the common request format.
API URL
The request API URL is as follows.
API Gateway's unique invoke URL created in CLOVA Speech Domain
Note
For more information on how to check the InvokeURL, see CLOVA Speech User Guide.
Request headers
The following describes the headers.
| Field | Required | Description |
|---|---|---|
Content-Type | Required | Request data format
|
Response
The following describes the common response format.
Response status codes
The following describes the response status codes.
Note
For response status codes common to NAVER Cloud Platform, see Ncloud API response status codes.
| HTTP status code | Code | Message | Description |
|---|---|---|---|
| 400 | 400 | Invalid request parameters | Entered request parameter value is invalid |
| 401 | 401 | Invalid secret | Entered secret key value is invalid |
| 400 | STT002 | Invalid Content Type | Content-Type other than application/octet-stream is entered |
| 400 | STT003 | Empty Sound Data | Voice data missing |
| 400 | STT005 | Invalid Language | Entered language (lang) parameter not supported |
| 400 | STT004 | Empty Language | Language (lang) parameter missing |
| 413 | STT001 | Exceed Sound Data length | Entered voice data value exceeds the allowed length (60 seconds) |
| 500 | STT006 | Failed to pre-processing | Error during speech recognition preprocessing
|
| 500 | STT998 | Failed to STT | Error during speech recognition
|
| 500 | STT999 | Internal Server Error | Internal server error
|
| - | - | SUCCEEDED | Task successful |
| - | - | PROCESSING | Job in progress |
| - | - | ERROR_SERVER_BUSY | Server has no free resources |
| - | - | ERROR_TOKEN_INVALID | Token doesn't exist |
| - | - | ERROR_AUDIO_EMPTY | Voice data value doesn't exist |
| - | - | ERROR_AUDIO_CONVERSION | Failed to convert voice |
| - | - | ERROR_PARAMS_FORMAT_INVALID | Entered parameter format is not JSON |
| - | - | ERROR_REQUEST_PARAMETER | Entered request parameter is invalid |
| - | - | ERROR_REQUEST_PARAMETER | Speaker not recognized |
| - | - | ERROR_INVALID_SECRET | Entered secret key value is invalid |
| - | - | ERROR_DATA_NOT_FOUND | Internal server errors |
| - | - | ERROR_DATA_CONFLICT | Data conflict |
| - | - | ERROR_INTERNAL_ERROR | Internal server errors |
| - | - | ERROR_EXTERNAL_ERROR | Service not operational |
| - | - | ERROR_TOO_MANY_JOBS | Too many jobs |
| - | - | ERROR_GATEWAY_TIMEOUT | Timeout |
| - | - | FAILED | Other errors |
CLOVA Speech API
The following describes the APIs provided by the CLOVA Speech service.
| API | Description |
|---|---|
| Long sentence recognition > Object Storage file recognition | Recognize long text as unique URLs of media files stored in Object Storage on NAVER Cloud Platform |
| Long sentence recognition > External file recognition | Recognize long text from unique URLs of publicly available audio files |
| Long sentence recognition > Local file recognition | Recognize long text for local files |
| Long sentence recognition > Get job status | Check the job status asynchronously |
| Short sentence recognition | Recognize short voice files up to 60 seconds long |
| Live streaming recognition | Real-time speech recognition and text-to-speech |
CLOVA Speech related resources
NAVER Cloud Platform provides a variety of related resources to help users better understand CLOVA Speech APIs.
- CLOVA Speech API guides
- Common Ncloud response status codes: information on common response status codes of NAVER Cloud Platform used by the CLOVA Speech service
- Object Storage User Guide: how to use Object Storage required for the use of CLOVA Speech
- Sub Account User Guide: how to use Sub Account that helps the management of CLOVA Speech's administration permissions
- How to use the CLOVA Speech service
- CLOVA Speech User Guide: how to use the CLOVA Speech service, check usage, and set up notifications in NAVER Cloud Platform console
- Prerequisites for using CLOVA Speech: supported specifications, limitations, and usage fees in order to use CLOVA Speech
- Ncloud use environment guide: guide on VPC and Classic environments and supported features
- Introduction to pricing, characteristics, and detailed features: summary of CLOVA Speech pricing system, characteristics, and detailed features of CLOVA Speech
- Latest service news: the latest news on CLOVA Speech
- FAQ: frequently asked questions from CLOVA Speech users
- Contact Us: Send direct inquiries in case of any unresolved questions that aren't answered by the user guides.
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