自動偵測語言

預覽

這項功能適用《服務專屬條款》中「一般服務條款」一節的《正式發布前產品條款》。正式發布前功能是依「原樣」提供，支援服務可能受限。 詳情請參閱推出階段說明。

本頁說明如何設定辨識器，從預設的可能語言清單中，自動辨識音訊檔案中使用的語言。

有時您可能不確定錄音內容包含何種語言。舉例來說，如果您在有多種官方語言的國家/地區發布服務、應用程式或產品，可能會收到使用者以多種語言輸入的音訊。如此一來，如果要替語音轉錄要求指定單一語言代碼，難度可能就更高了。

多語言辨識

Cloud Speech-to-Text 可讓您指定音訊資料可能包含的一組語言。建立 Recognizer 或傳送辨識要求時，您可以在 language_codes 欄位中提供音訊資料可能包含的一或多種語言。如果要求中包含多種語言，Cloud Speech-to-Text 會嘗試從您提供的替代語言清單中，選取最合適的語言來轉錄音訊。Cloud Speech-to-Text 接著會使用預測的語言代碼，為轉錄結果加上標籤。

此功能適用於需要對語音指令或搜尋指令等簡短陳述式，執行語音轉錄的應用程式。最多可列出三種語言，供系統自動辨識。

注意： 雖然最多可以指定三種語言，但最佳做法是盡量減少語言清單。指定的語言代碼越少，Cloud Speech-to-Text 成功選取正確語言的機率就越高。

注意：指定多種語言的功能僅適用於 Cloud Speech-to-Text global 區域和 us、eu 多區域。

注意：替代語言功能僅適用於 long、short 和 telephony 模型。如要進一步瞭解如何指定不同模型，請參閱模型說明文件。

事前準備

登入 Google Cloud 帳戶。如果您是 Google Cloud新手，歡迎 建立帳戶，親自體驗產品的實際應用成效。新客戶還能獲得價值 $300 美元的免費抵免額，能用於執行、測試及部署工作負載。

In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

Roles required to select or create a project

• Select a project: Selecting a project doesn't require a specific IAM role—you can select any project that you've been granted a role on.
• Create a project: To create a project, you need the Project Creator role (roles/resourcemanager.projectCreator), which contains the resourcemanager.projects.create permission. Learn how to grant roles.

Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

Go to project selector

Verify that billing is enabled for your Google Cloud project.

Enable the Speech-to-Text APIs, if any are not already enabled.

Roles required to enable APIs

To enable APIs, you need the serviceusage.services.enable permission. If you created the project, then you likely already have this permission through the Owner role (roles/owner). Otherwise, you can get this permission through the Service Usage Admin role (roles/serviceusage.serviceUsageAdmin). Learn how to grant roles.

Enable the APIs

Make sure that you have the following role or roles on the project: Cloud Speech Administrator

Check for the roles

1. In the Google Cloud console, go to the IAM page.

   Go to IAM
2. Select the project.

3. In the Principal column, find all rows that identify you or a group that you're included in. To learn which groups you're included in, contact your administrator.

4. For all rows that specify or include you, check the Role column to see whether the list of roles includes the required roles.

Grant the roles

1. In the Google Cloud console, go to the IAM page.

   Go to IAM
2. Select the project.
3. Click Grant access.

4. In the New principals field, enter your user identifier. This is typically the email address for a Google Account.

5. Click Select a role, then search for the role.
6. To grant additional roles, click Add another role and add each additional role.
7. Click Save.

Install the Google Cloud CLI.

Note: If you installed the gcloud CLI previously, make sure you have the latest version by running gcloud components update.

If you're using an external identity provider (IdP), you must first sign in to the gcloud CLI with your federated identity.

To initialize the gcloud CLI, run the following command:

gcloud init

In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

Roles required to select or create a project

• Select a project: Selecting a project doesn't require a specific IAM role—you can select any project that you've been granted a role on.
• Create a project: To create a project, you need the Project Creator role (roles/resourcemanager.projectCreator), which contains the resourcemanager.projects.create permission. Learn how to grant roles.

Note: If you don't plan to keep the resources that you create in this procedure, create a project instead of selecting an existing project. After you finish these steps, you can delete the project, removing all resources associated with the project.

Go to project selector

Verify that billing is enabled for your Google Cloud project.

Enable the Speech-to-Text APIs, if any are not already enabled.

Roles required to enable APIs

To enable APIs, you need the serviceusage.services.enable permission. If you created the project, then you likely already have this permission through the Owner role (roles/owner). Otherwise, you can get this permission through the Service Usage Admin role (roles/serviceusage.serviceUsageAdmin). Learn how to grant roles.

Enable the APIs

Make sure that you have the following role or roles on the project: Cloud Speech Administrator

Check for the roles

1. In the Google Cloud console, go to the IAM page.

   Go to IAM
2. Select the project.

3. In the Principal column, find all rows that identify you or a group that you're included in. To learn which groups you're included in, contact your administrator.

4. For all rows that specify or include you, check the Role column to see whether the list of roles includes the required roles.

Grant the roles

1. In the Google Cloud console, go to the IAM page.

   Go to IAM
2. Select the project.
3. Click Grant access.

4. In the New principals field, enter your user identifier. This is typically the email address for a Google Account.

5. Click Select a role, then search for the role.
6. To grant additional roles, click Add another role and add each additional role.
7. Click Save.

Install the Google Cloud CLI.

Note: If you installed the gcloud CLI previously, make sure you have the latest version by running gcloud components update.

If you're using an external identity provider (IdP), you must first sign in to the gcloud CLI with your federated identity.

To initialize the gcloud CLI, run the following command:

gcloud init

用戶端程式庫可以使用應用程式預設憑證，輕鬆向 Google API 進行驗證，並向這些 API 傳送要求。有了應用程式預設憑證，您可以在本機測試應用程式，並在不變更基礎程式碼的情況下部署應用程式。詳情請參閱「 進行驗證以使用用戶端程式庫」一文。

1. 如果您使用本機殼層，請為使用者帳戶建立本機驗證憑證：

   gcloud auth application-default login

   如果您使用 Cloud Shell，則不需要執行這項操作。

   如果系統傳回驗證錯誤，且您使用的是外部識別資訊提供者 (IdP)，請確認您已 使用聯合身分登入 gcloud CLI。

此外，請務必安裝用戶端程式庫。

在音訊轉錄要求中啟用語言辨識功能

以下範例展示如何對本機音訊檔案執行同步語音辨識，並使用多種語言。

Python

import os

from typing import List

from google.cloud.speech_v2 import SpeechClient
from google.cloud.speech_v2.types import cloud_speech

PROJECT_ID = os.getenv("GOOGLE_CLOUD_PROJECT")


def transcribe_multiple_languages_v2(
    audio_file: str,
    language_codes: List[str],
) -> cloud_speech.RecognizeResponse:
    """Transcribe an audio file using Google Cloud Speech-to-Text API with support for multiple languages.
    Args:
        audio_file (str): Path to the local audio file to be transcribed.
            Example: "resources/audio.wav"
        language_codes (List[str]): A list of BCP-47 language codes to be used for transcription.
            Example: ["en-US", "fr-FR"]
    Returns:
        cloud_speech.RecognizeResponse: The response from the Speech-to-Text API containing the
            transcription results.
    """
    client = SpeechClient()

    # Reads a file as bytes
    with open(audio_file, "rb") as f:
        audio_content = f.read()

    config = cloud_speech.RecognitionConfig(
        auto_decoding_config=cloud_speech.AutoDetectDecodingConfig(),
        language_codes=language_codes,
        model="latest_long",
    )

    request = cloud_speech.RecognizeRequest(
        recognizer=f"projects/{PROJECT_ID}/locations/global/recognizers/_",
        config=config,
        content=audio_content,
    )

    # Transcribes the audio into text
    response = client.recognize(request=request)
    # Prints the transcription results
    for result in response.results:
        print(f"Transcript: {result.alternatives[0].transcript}")

    return response

清除所用資源

如要避免系統向您的 Google Cloud 帳戶收取本頁所用資源的費用，請按照下列步驟操作。

1. 選用：撤銷您建立的驗證憑證，並刪除本機憑證檔案。

   gcloud auth application-default revoke

2. 選用：從 gcloud CLI 撤銷憑證。

   gcloud auth revoke

控制台

注意：刪除專案會有以下後果：

• 專案中的所有內容都會遭到刪除。如果使用現有專案來進行本文中的任務，刪除專案將一併移除當中已完成的其他任務'。
• 自訂專案 ID 會消失。當您之前建立這個專案時，可能建立了想要在日後使用的自訂專案 ID。如要保留使用該專案 ID 的網址 (例如 appspot.com 網址)，請刪除在該專案中選取的資源，而不是刪除整個專案。

如果打算探索多種架構、教學課程或快速入門導覽課程，重複使用專案可避免超出專案配額限制。

前往 Google Cloud 控制台的「Manage resources」(管理資源) 頁面。

前往「Manage resources」(管理資源)

在專案清單中選取要刪除的專案，然後點選「Delete」(刪除)。

在對話方塊中輸入專案 ID，然後按一下 [Shut down] (關閉) 以刪除專案。

gcloud

注意：刪除專案會造成以下影響：

• 專案中的所有內容都會遭到刪除。如果使用現有專案來進行本文中的任務，刪除專案將一併移除當中已完成的其他任務'。
• 自訂專案 ID 會消失。當您之前建立這個專案時，可能建立了想要在日後使用的自訂專案 ID。如要保留使用該專案 ID 的網址 (例如 appspot.com 網址)，請刪除在該專案中選取的資源，而不是刪除整個專案。

如果打算探索多種架構、教學課程或快速入門導覽課程，重複使用專案可避免超出專案配額限制。

刪除 Google Cloud 專案：

gcloud projects delete PROJECT_ID

後續步驟

• 瞭解如何轉錄短音訊檔案。
• 瞭解如何轉錄串流音訊。
• 瞭解如何轉錄長音訊檔案。
• 如要瞭解如何獲得最佳效能和準確度，以及其他提示，請參閱最佳做法說明文件。