diff --git a/google/cloud/speech/v1/cloud_speech.proto b/google/cloud/speech/v1/cloud_speech.proto
index afca4d57f..97dd86296 100644
--- a/google/cloud/speech/v1/cloud_speech.proto
+++ b/google/cloud/speech/v1/cloud_speech.proto
@@ -19,6 +19,10 @@ package google.cloud.speech.v1;
 import "google/api/annotations.proto";
 import "google/rpc/status.proto";
 
+option java_multiple_files = true;
+option java_outer_classname = "SpeechProto";
+option java_package = "com.google.cloud.speech.v1";
+
 
 // Service that implements Google Cloud Speech API.
 service Speech {
@@ -51,7 +55,7 @@ message RecognizeRequest {
 
   // The audio data to be recognized. For `NonStreamingRecognize`, all the
   // audio data must be contained in the first (and only) `RecognizeRequest`
-  //  message. For streaming `Recognize`, sequential chunks of audio data are
+  // message. For streaming `Recognize`, sequential chunks of audio data are
   // sent in sequential `RecognizeRequest` messages.
   AudioRequest audio_request = 2;
 }
@@ -61,7 +65,7 @@ message RecognizeRequest {
 message InitialRecognizeRequest {
   // Audio encoding of the data sent in the audio message.
   enum AudioEncoding {
-    // Not specified. Will return result `INVALID_ARGUMENT`.
+    // Not specified. Will return result [google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT].
     ENCODING_UNSPECIFIED = 0;
 
     // Uncompressed 16-bit signed little-endian samples.
@@ -115,8 +119,6 @@ message InitialRecognizeRequest {
   // profanities, replacing all but the initial character in each filtered word
   // with asterisks, e.g. "f***". If set to `false` or omitted, profanities
   // won't be filtered out.
-  // Note that profanity filtering is not implemented for all languages.
-  // If the language is not supported, this setting has no effect.
   bool profanity_filter = 5;
 
   // [Optional] If `false` or omitted, the recognizer will detect a single
@@ -143,13 +145,38 @@ message InitialRecognizeRequest {
   // as they become available.
   // If `false` or omitted, no `EndpointerEvents` are returned.
   bool enable_endpointer_events = 8;
+
+  // [Optional] URI that points to a file where the recognition result should
+  // be stored in JSON format. If omitted or empty string, the recognition
+  // result is returned in the response. Should be specified only for
+  // `NonStreamingRecognize`. If specified in a `Recognize` request,
+  // `Recognize` returns [google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT].
+  // If specified in a `NonStreamingRecognize` request,
+  // `NonStreamingRecognize` returns immediately, and the output file
+  // is created asynchronously once the audio processing completes.
+  // Currently, only Google Cloud Storage URIs are supported, which must be
+  // specified in the following format: `gs://bucket_name/object_name`
+  // (other URI formats return [google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT]). For
+  // more information, see [Request URIs](/storage/docs/reference-uris).
+  string output_uri = 9;
 }
 
 // Contains audio data in the format specified in the `InitialRecognizeRequest`.
+// Either `content` or `uri` must be supplied. Supplying both or neither
+// returns [google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT].
 message AudioRequest {
-  // [Required] The audio data bytes encoded as specified in
-  // `InitialRecognizeRequest`.
+  // The audio data bytes encoded as specified in
+  // `InitialRecognizeRequest`. Note: as with all bytes fields, protobuffers
+  // use a pure binary representation, whereas JSON representations use base64.
   bytes content = 1;
+
+  // URI that points to a file that contains audio data bytes as specified in
+  // `InitialRecognizeRequest`. Currently, only Google Cloud Storage URIs are
+  // supported, which must be specified in the following format:
+  // `gs://bucket_name/object_name` (other URI formats return
+  // [google.rpc.Code.INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT]). For more information, see
+  // [Request URIs](/storage/docs/reference-uris).
+  string uri = 2;
 }
 
 // `NonStreamingRecognizeResponse` is the only message returned to the client by
@@ -190,8 +217,12 @@ message RecognizeResponse {
   // specifies the error for the operation.
   google.rpc.Status error = 1;
 
-  // [Output-only] May contain zero or one `is_final=true` result (the newly
-  // settled portion). May also contain zero or more `is_final=false` results.
+  // [Output-only] For `continuous=false`, this repeated list contains zero or
+  // one result that corresponds to all of the audio processed so far. For
+  // `continuous=true`, this repeated list contains zero or more results that
+  // correspond to consecutive portions of the audio being processed.
+  // In both cases, contains zero or one `is_final=true` result (the newly
+  // settled portion), followed by zero or more `is_final=false` results.
   repeated SpeechRecognitionResult results = 2;
 
   // [Output-only] Indicates the lowest index in the `results` array that has
@@ -203,7 +234,10 @@ message RecognizeResponse {
   EndpointerEvent endpoint = 4;
 }
 
+// A speech recognition result corresponding to a portion of the audio.
 message SpeechRecognitionResult {
+  // [Output-only] May contain one or more recognition hypotheses (up to the
+  // maximum specified in `max_alternatives`).
   repeated SpeechRecognitionAlternative alternatives = 1;
 
   // [Output-only] Set `true` if this is the final time the speech service will