Abstract
-
-1. Intended Status (To Be Removed Upon Publication)
-
- The intended status of this document is Proposed Standard.
-
This document describes an RTP payload format for transporting Vorbis
encoded audio. It details the RTP encapsulation mechanism for raw
Vorbis data and details the delivery mechanisms for the decoder
probability model, referred to as a codebook and other setup
+ information.
+
+ Also included within this memo are media type registrations, and the
+ details necessary for the use of Vorbis with the Session Description
+ Protocol (SDP).
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
- information.
-
- Also included within this memo are media type registrations, and the
- details necessary for the use of Vorbis with the Session Description
- Protocol (SDP).
-
Editors Note
All references to RFC XXXX are to be replaced by references to the
Table of Contents
- 1. Intended Status (To Be Removed Upon Publication) . . . . . . . 1
- 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
- 2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
- 3. Payload Format . . . . . . . . . . . . . . . . . . . . . . . . 3
- 3.1. RTP Header . . . . . . . . . . . . . . . . . . . . . . . . 3
- 3.2. Payload Header . . . . . . . . . . . . . . . . . . . . . . 5
- 3.3. Payload Data . . . . . . . . . . . . . . . . . . . . . . . 6
- 3.4. Example RTP Packet . . . . . . . . . . . . . . . . . . . . 7
- 4. Configuration Headers . . . . . . . . . . . . . . . . . . . . 8
- 4.1. In-band Header Transmission . . . . . . . . . . . . . . . 9
- 4.1.1. Packed Configuration . . . . . . . . . . . . . . . . . 9
- 4.2. Out of Band Transmission . . . . . . . . . . . . . . . . . 10
- 4.2.1. Packed Headers . . . . . . . . . . . . . . . . . . . . 11
- 4.3. Loss of Configuration Headers . . . . . . . . . . . . . . 13
- 5. Comment Headers . . . . . . . . . . . . . . . . . . . . . . . 13
- 6. Frame Packetization . . . . . . . . . . . . . . . . . . . . . 14
- 6.1. Example Fragmented Vorbis Packet . . . . . . . . . . . . . 15
- 6.2. Packet Loss . . . . . . . . . . . . . . . . . . . . . . . 17
- 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18
- 8. SDP related considerations . . . . . . . . . . . . . . . . . . 20
- 8.1. Mapping MIME Parameters into SDP . . . . . . . . . . . . . 20
- 8.1.1. SDP Example . . . . . . . . . . . . . . . . . . . . . 20
- 8.2. Usage with the SDP Offer/Answer Model . . . . . . . . . . 21
- 9. Congestion Control . . . . . . . . . . . . . . . . . . . . . . 21
- 10. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
- 10.1. Stream Radio . . . . . . . . . . . . . . . . . . . . . . . 22
- 11. Security Considerations . . . . . . . . . . . . . . . . . . . 22
- 12. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 22
- 13. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23
- 13.1. Normative References . . . . . . . . . . . . . . . . . . . 23
- 13.2. Informative References . . . . . . . . . . . . . . . . . . 24
+ 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
+ 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3
+ 2. Payload Format . . . . . . . . . . . . . . . . . . . . . . . . 3
+ 2.1. RTP Header . . . . . . . . . . . . . . . . . . . . . . . . 3
+ 2.2. Payload Header . . . . . . . . . . . . . . . . . . . . . . 5
+ 2.3. Payload Data . . . . . . . . . . . . . . . . . . . . . . . 6
+ 2.4. Example RTP Packet . . . . . . . . . . . . . . . . . . . . 7
+ 3. Configuration Headers . . . . . . . . . . . . . . . . . . . . 8
+ 3.1. In-band Header Transmission . . . . . . . . . . . . . . . 9
+ 3.1.1. Packed Configuration . . . . . . . . . . . . . . . . . 9
+ 3.2. Out of Band Transmission . . . . . . . . . . . . . . . . . 10
+ 3.2.1. Packed Headers . . . . . . . . . . . . . . . . . . . . 11
+ 3.3. Loss of Configuration Headers . . . . . . . . . . . . . . 12
+ 4. Comment Headers . . . . . . . . . . . . . . . . . . . . . . . 12
+ 5. Frame Packetization . . . . . . . . . . . . . . . . . . . . . 13
+ 5.1. Example Fragmented Vorbis Packet . . . . . . . . . . . . . 13
+ 5.2. Packet Loss . . . . . . . . . . . . . . . . . . . . . . . 16
+ 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 17
+ 6.1. Packed Headers IANA Considerations . . . . . . . . . . . . 18
+ 7. SDP related considerations . . . . . . . . . . . . . . . . . . 20
+ 7.1. Mapping MIME Parameters into SDP . . . . . . . . . . . . . 20
+ 7.1.1. SDP Example . . . . . . . . . . . . . . . . . . . . . 21
+ 7.2. Usage with the SDP Offer/Answer Model . . . . . . . . . . 21
+ 8. Congestion Control . . . . . . . . . . . . . . . . . . . . . . 21
+ 9. Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
+ 9.1. Stream Radio . . . . . . . . . . . . . . . . . . . . . . . 22
+ 10. Security Considerations . . . . . . . . . . . . . . . . . . . 22
+ 11. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 23
+ 12. References . . . . . . . . . . . . . . . . . . . . . . . . . . 23
+ 12.1. Normative References . . . . . . . . . . . . . . . . . . . 23
+ 12.2. Informative References . . . . . . . . . . . . . . . . . . 24
Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 24
Intellectual Property and Copyright Statements . . . . . . . . . . 25
+
+
+
+
+
+
Barbato Expires October 8, 2007 [Page 2]
\f
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-2. Introduction
+1. Introduction
Vorbis is a general purpose perceptual audio codec intended to allow
maximum encoder flexibility, thus allowing it to scale competitively
quadraphonic, 5.1, ambisonic, or up to 255 discrete channels).
Vorbis encoded audio is generally encapsulated within an Ogg format
- bitstream [11], which provides framing and synchronization. For the
+ bitstream [10], which provides framing and synchronization. For the
purposes of RTP transport, this layer is unnecessary, and so raw
Vorbis packets are used in the payload.
-2.1. Terminology
+1.1. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [1].
-3. Payload Format
+2. Payload Format
For RTP based transport of Vorbis encoded audio the standard RTP
header is followed by a 4 octets payload header, then the payload
bitstream information. There are 3 types of Vorbis payload data, an
RTP packet MUST contain just one of them at time.
-3.1. RTP Header
+2.1. RTP Header
The format of the RTP header is specified in [2] and shown in Figure
Figure 1. This payload format uses the fields of the header in a
Marker (M): 1 bit
Set to zero. Audio silence suppression not used. This conforms to
- section 4.1 of [13].
+ section 4.1 of [12].
Payload Type (PT): 7 bits
These two fields, 32 bits each with one SSRC field and a maximum of
16 CSRC fields, are as defined in [2].
-3.2. Payload Header
+2.2. Payload Header
The 4 octets following the RTP Header section are the Payload Header.
This header is split into a number of bitfields detailing the format
the payload. If the packet contains fragmented data the number of
packets MUST be set to 0.
-3.3. Payload Data
+2.3. Payload Data
Raw Vorbis packets are currently unbounded in length, application
profiles will likely define a practical limit. Typical Vorbis packet
sizes range from very small (2-3 bytes) to quite large (8-12
- kilobytes). The reference implementation [12] typically produces
+ kilobytes). The reference implementation [11] typically produces
packets less than ~800 bytes, except for the setup header packets
which are ~4-12 kilobytes. Within an RTP context, to avoid
fragmentation, the Vorbis data packet size SHOULD be kept
in temporal order.
Channel mapping of the audio is in accordance with the Vorbis I
- Specification [13].
+ Specification [12].
-3.4. Example RTP Packet
+2.4. Example RTP Packet
Here is an example RTP packet containing two Vorbis packets.
decode the packets is the one indexed by the ident value.
-4. Configuration Headers
+3. Configuration Headers
Unlike other mainstream audio codecs Vorbis has no statically
configured probability model. Instead, it packs all entropy decoding
compressed data stream. These two blocks of information are often
referred to collectively as the "codebooks" for a Vorbis stream, and
are nominally included as special "header" packets at the start of
- the compressed data. In addition, the Vorbis I specification [13]
+ the compressed data. In addition, the Vorbis I specification [12]
requires the presence of a comment header packet which gives simple
metadata about the stream, but this information is not required for
decoding the frame sequence.
The delivery vectors in use are specified by an SDP attribute to
indicate the method and the optional URI where the Vorbis Packed
- Configuration (Section 4.1.1) Packets could be fetched. Different
+ Configuration (Section 3.1.1) Packets could be fetched. Different
delivery methods MAY be advertised for the same session. The in-band
Configuration delivery SHOULD be considered as baseline, out-of-band
delivery methods that don't use RTP will not be described in this
document. For non chained streams, the Configuration recommended
- delivery method is inline the Packed Configuration (Section 4.1.1) in
- the SDP as explained in the IANA considerations (Section 8.1)
+ delivery method is inline the Packed Configuration (Section 3.1.1) in
+ the SDP as explained in the IANA considerations (Section 7.1)
section.
The 24 bit Ident field is used to map which Configuration will be
information it MUST NOT decode the raw Vorbis data associated until
it fetches the correct Configuration.
-4.1. In-band Header Transmission
+3.1. In-band Header Transmission
- The Packed Configuration (Section 4.1.1) Payload is sent in-band with
+ The Packed Configuration (Section 3.1.1) Payload is sent in-band with
the packet type bits set to match the Vorbis Data Type. Clients MUST
be capable of dealing with fragmentation and periodic re-transmission
of the configuration headers.
-4.1.1. Packed Configuration
+3.1.1. Packed Configuration
A Vorbis Packed Configuration is indicated with the Vorbis Data Type
field set to 1. Of the three headers, defined in the Vorbis I
- specification [13], the identification and the setup will be packed
+ specification [12], the identification and the setup will be packed
together, the comment header is completely suppressed. Is up to the
client to provide a minimal size comment header to the decoder if
required by the implementation.
set to 0 since the packet bears the full Packed configuration, the
number of packet is set to 1.
-4.2. Out of Band Transmission
+3.2. Out of Band Transmission
This section, as stated above, does not cover all the possible out-
of-band delivery methods since they rely on different protocols and
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-4.2.1. Packed Headers
+3.2.1. Packed Headers
As mentioned above the RECOMMENDED delivery vector for Vorbis
configuration data is via a retrieval method that can be performed
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-4.2.1.1. Packed Headers IANA Considerations
-
- The following IANA considerations MUST only be applied to the packed
- headers.
-
- MIME media type name: audio
-
- MIME subtype: vorbis-config
-
- Required Parameters:
-
- None
-
- Optional Parameters:
-
- None
-
- Encoding considerations:
-
- This media type contains binary data.
-
- Security Considerations:
-
- See Section 6 of RFC XXXX.
-
- Interoperability considerations:
-
- None
-
- Published specification:
-
- RFC XXXX [RFC Editor: please replace by the RFC number of this
- memo, when published]
-
- Applications which use this media type:
-
- Vorbis encoded audio, configuration data.
-
- Additional information:
-
- None
-
- Person & email address to contact for further information:
-
- Luca Barbato: <lu_zero@gentoo.org>
- IETF Audio/Video Transport Working Group
-
-
-
-
-
-Barbato Expires October 8, 2007 [Page 12]
-\f
-Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-
-
- Intended usage: COMMON
-
- Restriction on usage:
-
- This media type doesn't depend on the transport.
-
- Author:
-
- Luca Barbato
-
- Change controller:
-
- IETF AVT Working Group
-
-4.3. Loss of Configuration Headers
+3.3. Loss of Configuration Headers
Unlike the loss of raw Vorbis payload data, loss of a configuration
header can lead to a situation where it will not be possible to
decoding.
-5. Comment Headers
+4. Comment Headers
With the Vorbis Data Type flag set to 2, this indicates that the
packet contain the comment metadata, such as artist name, track title
and so on. These metadata messages are not intended to be fully
descriptive but to offer basic track/song information. Clients MAY
ignore it completely. The details on the format of the comments can
- be found in the Vorbis documentation [13].
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-Barbato Expires October 8, 2007 [Page 13]
-\f
-Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-
+ be found in the Vorbis documentation [12].
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
fragmented.
-6. Frame Packetization
+
+
+
+
+Barbato Expires October 8, 2007 [Page 12]
+\f
+Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
+
+
+5. Frame Packetization
Each RTP packet contains either one Vorbis packet fragment, or an
integer number of complete Vorbis packets (up to a maximum of 15
correct sequence for fragmented packet reception the timestamp field
of fragmented packets MUST be the same as the first packet sent, with
the sequence number incremented as normal for the subsequent RTP
+ packets. The length field shows the fragment length.
+
+5.1. Example Fragmented Vorbis Packet
+
+ Here is an example fragmented Vorbis packet split over three RTP
+ packets. Each packet contains the standard RTP headers as well as
+ the 4 octets Vorbis headers.
+
+
+
+
+
+
+
-Barbato Expires October 8, 2007 [Page 14]
-\f
-Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
- packets. The length field shows the fragment length.
-6.1. Example Fragmented Vorbis Packet
- Here is an example fragmented Vorbis packet split over three RTP
- packets. Each packet contains the standard RTP headers as well as
- the 4 octets Vorbis headers.
+
+
+
+
+
+
+
+
+
+
+Barbato Expires October 8, 2007 [Page 13]
+\f
+Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
+
Packet 1:
-Barbato Expires October 8, 2007 [Page 15]
+
+
+
+
+
+
+
+
+Barbato Expires October 8, 2007 [Page 14]
\f
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-Barbato Expires October 8, 2007 [Page 16]
+Barbato Expires October 8, 2007 [Page 15]
\f
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
the timestamp remains set to the first packet in the sequence and the
sequence number has been incremented.
-6.2. Packet Loss
+5.2. Packet Loss
As there is no error correction within the Vorbis stream, packet loss
will result in a loss of signal. Packet loss is more of an issue for
Loss of any of the Configuration fragment will result in the loss of
the full Configuration packet with the result detailed in the Loss of
- Configuration Headers (Section 4.3) section.
+ Configuration Headers (Section 3.3) section.
-Barbato Expires October 8, 2007 [Page 17]
+Barbato Expires October 8, 2007 [Page 16]
\f
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-7. IANA Considerations
+6. IANA Considerations
- MIME media type name: audio
+ Type name: audio
- MIME subtype: vorbis
+ Subtype name: vorbis
- Required Parameters:
+ Required parameters:
rate: indicates the RTP timestamp clock rate as described in RTP
Profile for Audio and Video Conferences with Minimal Control.
Control. [3]
delivery-method: indicates the delivery methods in use, the
- possible values are: inline, in_band, out_band/specific_name
- Where "specific_name" is the name of the out of band delivery
- method.
+ possible values are: inline, in_band, out_band
configuration: the base64 [8] representation of the Packed
- Headers (Section 4.2.1).
+ Headers (Section 3.2.1).
- Optional Parameters:
+ Optional parameters:
configuration-uri: the URI of the configuration headers in case
of out of band transmission. In the form of
method, a single configuration packet could be retrived by its
number, or multiple packets could be aggregated in a single
stream. Such aggregates MAY be compressed using either bzip2
- [10] or gzip [14]. A sha1 [9] checksum MAY be provided for
+ [15] or gzip [13]. A sha1 [9] checksum MAY be provided for
aggregates. In this latter case the URI will end with the
aggregate name, followed by its compressed extension if
applies, a "!" and the base64 [8] representation of the
This media type is framed and contains binary data.
+ Security considerations:
+ See Section 10 of RFC XXXX.
-Barbato Expires October 8, 2007 [Page 18]
+Barbato Expires October 8, 2007 [Page 17]
\f
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
- Security Considerations:
-
- See Section 6 of RFC XXXX.
-
Interoperability considerations:
None
Change controller:
- IETF AVT Working Group
+ IETF AVT Working Group delegated from the IESG
+
+
+6.1. Packed Headers IANA Considerations
+
+ The following IANA considerations MUST only be applied to the packed
+ headers.
+
+
+
+
+Barbato Expires October 8, 2007 [Page 18]
+\f
+Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
+
+
+ Type name: audio
+
+ Subtype name: vorbis-config
+
+ Required parameters:
+
+ None
+
+ Optional parameters:
+
+ None
+
+ Encoding considerations:
+
+ This media type contains binary data.
+
+ Security considerations:
+
+ See Section 10 of RFC XXXX.
+
+ Interoperability considerations:
+
+ None
+
+ Published specification:
+
+ RFC XXXX [RFC Editor: please replace by the RFC number of this
+ memo, when published]
+
+ Applications which use this media type:
+
+ Vorbis encoded audio, configuration data.
+
+ Additional information:
+
+ None
+
+ Person & email address to contact for further information:
+
+ Luca Barbato: <lu_zero@gentoo.org>
+ IETF Audio/Video Transport Working Group
+
+ Intended usage: COMMON
+
+
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-8. SDP related considerations
+ Restriction on usage:
+
+ This media type doesn't depend on the transport.
+
+ Author:
+
+ Luca Barbato
+
+ Change controller:
+
+ IETF AVT Working Group delegated from the IESG
+
+
+7. SDP related considerations
The following paragraphs defines the mapping of the parameters
described in the IANA considerations section and their usage in the
Offer/Answer Model [7].
-8.1. Mapping MIME Parameters into SDP
+7.1. Mapping MIME Parameters into SDP
The information carried in the MIME media type specification has a
specific mapping to fields in the Session Description Protocol (SDP)
The URI specified in the configuration-uri attribute MUST point to a
location where all of the Configuration Packets needed for the life
+
+
+
+Barbato Expires October 8, 2007 [Page 20]
+\f
+Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
+
+
of the session reside.
The port value is specified by the server application bound to the
specified in the rtpmap attribute MUST match the Vorbis sample rate
value. An example is found below.
-8.1.1. SDP Example
+7.1.1. SDP Example
The following example shows a basic SDP single stream. The first
configuration packet is inlined in the sdp, other configurations
could be fetched at any time from the first provided uri using or all
the known configuration could be downloaded using the second uri.
-
-
-
-Barbato Expires October 8, 2007 [Page 20]
-\f
-Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-
-
The inline base64 [8] configuration string is omitted because of the
lenght.
c=IN IP4 192.0.2.1
being case sensitive. The a=fmtp line is a single line even if it is
presented broken because of clarity.
-8.2. Usage with the SDP Offer/Answer Model
+7.2. Usage with the SDP Offer/Answer Model
The offer, as described in An Offer/Answer Model Session Description
Protocol [7], may contain a large number of delivery methods per
altered on answer otherwise.
-9. Congestion Control
+8. Congestion Control
Vorbis clients SHOULD send regular receiver reports detailing
congestion. A mechanism for dynamically downgrading the stream,
known as bitrate peeling, will allow for a graceful backing off of
the stream bitrate. This feature is not available at present so an
- alternative would be to redirect the client to a lower bitrate stream
- if one is available.
-
-
-10. Examples
-
- The following examples are common usage patterns that MAY be applied
- in such situations, the main scope of this section is to explain
- better usage of the transmission vectors.
+Barbato Expires October 8, 2007 [Page 21]
+\f
+Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
+ alternative would be to redirect the client to a lower bitrate stream
+ if one is available.
-Barbato Expires October 8, 2007 [Page 21]
-\f
-Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
+9. Examples
+ The following examples are common usage patterns that MAY be applied
+ in such situations, the main scope of this section is to explain
+ better usage of the transmission vectors.
-10.1. Stream Radio
+9.1. Stream Radio
This is one of the most common situation: one single server streaming
content in multicast, the clients may start a session at random time.
The client could choose to fetch the Configuration from the alternate
source as soon it discovers a Configuration packet got lost in-band
- or use selective retransmission [15], if the server supports the
+ or use selective retransmission [14], if the server supports the
feature.
A serverside optimization would be to keep an hash list of the
already known.
-11. Security Considerations
+10. Security Considerations
RTP packets using this payload format are subject to the security
considerations discussed in the RTP specification [2]. This implies
+
+
+
+Barbato Expires October 8, 2007 [Page 22]
+\f
+Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
+
+
that the confidentiality of the media stream is achieved by using
encryption. Because the data compression used with this payload
format is applied end-to-end, encryption may be performed on the
taken to prevent buffer overflows in the client applications.
-12. Acknowledgments
+11. Acknowledgments
This document is a continuation of draft-moffitt-vorbis-rtp-00.txt
-
-
-
-Barbato Expires October 8, 2007 [Page 22]
-\f
-Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-
-
and draft-kerr-avt-vorbis-rtp-04.txt. The MIME type section is a
continuation of draft-short-avt-rtp-vorbis-mime-00.txt.
Ridolfo, Francesco Varano, Giampaolo Mancini, Juan Carlos De Martin.
-13. References
+12. References
-13.1. Normative References
+12.1. Normative References
[1] Bradner, S., "Key words for use in RFCs to Indicate Requirement
Levels", RFC 2119.
[7] Rosenberg, J. and H. Schulzrinne, "An Offer/Answer Model with
Session Description Protocol (SDP)", RFC 3264.
- [8] Josefsson, S., "The Base16, Base32, and Base64 Data Encodings",
- RFC 3548.
-
- [9] National Institute of Standards and Technology, "Secure Hash
- Standard", May 1993.
-
- [10] Seward, J., "libbz2 and bzip2".
-
-
-
Barbato Expires October 8, 2007 [Page 23]
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
-13.2. Informative References
+ [8] Josefsson, S., "The Base16, Base32, and Base64 Data Encodings",
+ RFC 3548.
+
+ [9] National Institute of Standards and Technology, "Secure Hash
+ Standard", May 1993.
+
+12.2. Informative References
- [11] Pfeiffer, S., "The Ogg Encapsulation Format Version 0",
+ [10] Pfeiffer, S., "The Ogg Encapsulation Format Version 0",
RFC 3533.
- [12] "libvorbis: Available from the Xiph website,
+ [11] "libvorbis: Available from the Xiph website,
http://www.xiph.org".
- [13] "Ogg Vorbis I specification: Codec setup and packet decode.
+ [12] "Ogg Vorbis I specification: Codec setup and packet decode.
Available from the Xiph website, http://www.xiph.org".
- [14] Deutsch, P., "GZIP file format specification version 4.3",
+ [13] Deutsch, P., "GZIP file format specification version 4.3",
RFC 1952.
- [15] Friedman, T., Caceres, R., and A. Clark, "RTP Control Protocol
+ [14] Friedman, T., Caceres, R., and A. Clark, "RTP Control Protocol
Extended Reports (RTCP XR)", RFC 3611, November 2003.
+ [15] Seward, J., "libbz2 and bzip2".
+
Author's Address
-
-
-
-
-
-
-
-
Barbato Expires October 8, 2007 [Page 24]
\f
Internet-Draft draft-ietf-avt-rtp-vorbis-02 April 2007
projects / platform / upstream / libvorbis.git / commitdiff