update cts doc for differentiate speaker property

Author: jimxiei

articles/cognitive-services/Speech-Service/conversation-transcription.md

@@ -53,7 +53,7 @@ This is a high-level overview of how Conversation Transcription works.
 - **User voice samples** – Conversation Transcription needs user profiles in advance of the conversation. You will need to collect audio recordings from each user, then send the recordings to the [Signature Generation Service](https://aka.ms/cts/signaturegenservice) to validate the audio and generate user profiles.
 
 > [!NOTE]
-> User voice samples are optional. Without this input, the transcription will show different speakers, but shown as "Speaker1", "Speaker2", etc. instead of recognizing as pre-enrolled specific speaker names.
+> User voice samples are optional. Without voice input but have `DifferentiateGuestSpeakers` enabled, the transcription will still show different speakers, but shown as "Speaker1", "Speaker2", etc. instead of recognizing as pre-enrolled specific speaker names. For more information about setting `DifferentiateGuestSpeakers`, please refer to sample codes in [Real-Time Conversation Transcription Quickstart](.\includes\how-to\conversation-transcription\real-time-csharp.md).
 
 
 ## Real-time vs. asynchronous

articles/cognitive-services/Speech-Service/includes/how-to/conversation-transcription/real-time-csharp.md

@@ -105,6 +105,7 @@ This sample code does the following:
 * Creates an `AudioConfig` from the sample `.wav` file to transcribe.
 * Creates a `Conversation` using `CreateConversationAsync()`.
 * Creates a `ConversationTranscriber` using the constructor, and subscribes to the necessary events.
+* Enables `DifferentiateGuestSpeakers` feature to show the different speakers.
 * Adds participants to the conversation. The strings `voiceSignatureStringUser1` and `voiceSignatureStringUser2` should come as output from the steps above from the function `GetVoiceSignatureString()`.
 * Joins the conversation and begins transcription.
 
@@ -133,7 +134,12 @@ public static async Task TranscribeConversationsAsync(string voiceSignatureStrin
 
     var config = SpeechConfig.FromSubscription(subscriptionKey, region);
     config.SetProperty("ConversationTranscriptionInRoomAndOnline", "true");
-    // config.SpeechRecognitionLanguage = "zh-cn"; // en-us by default. This code specifies Chinese.
+
+    // This will enable "differentiate speakers" feature. You could comment it if you want to disable the feature.
+    config.SetProperty("DifferentiateGuestSpeakers", "true");
+
+    // en-us by default. This code specifies Chinese.
+    // config.SpeechRecognitionLanguage = "zh-cn";
     var stopRecognition = new TaskCompletionSource<int>();
 
     using (var audioInput = AudioConfig.FromWavFileInput(filepath))

articles/cognitive-services/Speech-Service/includes/how-to/conversation-transcription/real-time-javascript.md

@@ -93,6 +93,11 @@ This sample code does the following:
 
     var speechTranslationConfig = sdk.SpeechTranslationConfig.fromSubscription(subscriptionKey, region);
     var audioConfig = sdk.AudioConfig.fromStreamInput(pushStream);
+    speechTranslationConfig.setProperty("ConversationTranscriptionInRoomAndOnline", "true");
+
+    // This will enable "differentiate speakers" feature. You could comment it if you want to disable the feature.
+    speechTranslationConfig.setProperty("DifferentiateGuestSpeakers", "true");
+
     speechTranslationConfig.speechRecognitionLanguage = "en-US";
 
     // create conversation and transcriber