自動偵測語言

預先發布版

這項功能 適用《服務專屬條款》。 正式發布前的功能是按照「原樣」提供，支援範圍可能有限。 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，如果您是在擁有多種官方語言的國家/地區發佈服務、應用程式或產品，收到的音訊內容可能來自各種不同語言的使用者。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 語音轉文字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。在包含多種語言的要求中，Cloud 語音轉文字會嘗試使用您提供的替代語言清單中，最適合的語言轉錄音訊。接著，Cloud Speech-to-Text 會為轉錄結果加上預測的語言代碼標籤。

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。你最多可以列出三種語言，供系統自動辨識。

注意： 雖然最多可以指定三種語言，但建議您盡量減少語言清單，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 與 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的模型，請參閱模型說明文件。

事前準備

Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.

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.

Roles required to enable APIs

To enable APIs, you need the Service Usage Admin IAM role (roles/serviceusage.serviceUsageAdmin), which contains the serviceusage.services.enable permission. 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.

   前往 IAM
2. 選取所需專案。
3. 點按「 Grant access」(授予存取權)。

4. 在「New principals」(新增主體) 欄位中，輸入您的使用者 ID。 這通常是指 Google 帳戶的電子郵件地址。

5. 在「Select a role」(選取角色) 清單中，選取角色。
6. 如要授予其他角色，請按一下「 Add another role」(新增其他角色)，然後新增其他角色。
7. 按一下「Save」(儲存)。

Install the Google Cloud CLI.

注意：如果您先前已安裝 gcloud CLI，請執行 gcloud components update，確保您使用的是最新版本。

若您採用的是外部識別資訊提供者 (IdP)，請先使用聯合身分登入 gcloud CLI。

執行下列指令，初始化 gcloud CLI：

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.

Roles required to enable APIs

To enable APIs, you need the Service Usage Admin IAM role (roles/serviceusage.serviceUsageAdmin), which contains the serviceusage.services.enable permission. 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.

   前往 IAM
2. 選取所需專案。
3. 點按「 Grant access」(授予存取權)。

4. 在「New principals」(新增主體) 欄位中，輸入您的使用者 ID。 這通常是指 Google 帳戶的電子郵件地址。

5. 在「Select a role」(選取角色) 清單中，選取角色。
6. 如要授予其他角色，請按一下「 Add another role」(新增其他角色)，然後新增其他角色。
7. 按一下「Save」(儲存)。

Install the Google Cloud CLI.

注意：如果您先前已安裝 gcloud CLI，請執行 gcloud components update，確保您使用的是最新版本。

若您採用的是外部識別資訊提供者 (IdP)，請先使用聯合身分登入 gcloud CLI。

執行下列指令，初始化 gcloud CLI：

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，然後傳送要求給這些 API。有了應用程式預設憑證，您就能在本機測試應用程式，然後再將其部署至 Compute Engine 執行個體，過程中無須變更基礎程式碼。詳情請參閱「 進行驗證以使用用戶端程式庫」一文。

1. If you're using a local shell, then create local authentication credentials for your user account:

   gcloud auth application-default login

   You don't need to do this if you're using Cloud Shell.

   If an authentication error is returned, and you are using an external identity provider (IdP), confirm that you have signed in to the gcloud CLI with your federated identity.

此外，請務必安裝用戶端程式庫。

在音訊語音轉錄要求中啟用語言辨識

以下是對本機音訊檔案執行同步語音辨識的範例，其中包含多種語言。

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 帳戶收取本頁面所用資源的費用，請按照下列步驟操作。

1. Optional: Revoke the authentication credentials that you created, and delete the local credential file.

   gcloud auth application-default revoke

2. Optional: Revoke credentials from the gcloud CLI.

   gcloud auth revoke

控制台

注意：刪除專案會造成以下結果：

• 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。

In the Google Cloud console, go to the Manage resources page.

Go to Manage resources

In the project list, select the project that you want to delete, and then click Delete.

In the dialog, type the project ID, and then click Shut down to delete the project.

gcloud

注意：刪除專案會造成以下結果：

• 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。

In the Google Cloud console, go to the Manage resources page.

Go to Manage resources

In the project list, select the project that you want to delete, and then click Delete.

In the dialog, type the project ID, and then click Shut down to delete the project.

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。
• 如要獲得最佳效能、準確率與其他提示，請參閱最佳做法說明文件。