IEC 61937 PDF

IEC /AMD Standard | Amendment 1 – Digital audio – Interface for non-linear PCM encoded audio bitstreams applying IEC. IEC Standard | Digital audio – Interface for non-linear PCM encoded audio bitstreams applying IEC – Part MPEG-H. IEC /AMD Standard | Amendment 2 – Digital audio – Interface for non-linear PCM encoded audio bitstreams applying IEC.

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With the increase in media storage devices that require compressed audio formats, applications must identify, describe, and use a variety of new encoded audio content for transmitting content from PCs to iev such as HDMI or DisplayPort receiver.

IEC | IEC Webstore

611937 To represent an encoded audio stream to be transmitted over an IEC compatible interface, an application must provide:. For a non-PCM format, these three members have been commandeered to store information about the compressed data in the audio stream.

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Based on the information in this structure, a user or an application might have difficulty inferring the quality level of the non-PCM stream. However, this structure is also not adequate in describing the stream for IEC transmissions because it was intended to represent a single set of irc and used for uncompressed, multi-channel PCM data.

The new structure explicitly specifies the effective number of channels, sample size, and data rate of a non-PCM format. With this information, an application can infer the quality level of the non-PCM stream after it is decompressed and played. The GUIDs for the compressed audio formats that eic available as standard IEC encoded audio formats are listed in the following table.

The GUIDs for the compressed audio jec that are transmitted in high bit-rate audio sample packets are listed in the following table. The GUIDs for the compressed audio formats that are not supported by the HD audio class driver and can be implemented by third-party solutions are listed in the following table. When Dolby Digital Plus content is transmitted over IECthe link-sampling rate must be four times 61397 sampling rate of the content.

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IEC /AMD | IEC Webstore

Dolby Digital Plus supports content sample rates of 32 KHz, Since Dolby MAT 2. To represent an encoded audio stream to be transmitted over an IEC compatible interface, an application must provide: The characteristics of an encoded audio stream to be transmitted.

The characteristics of a decoded audio stream on the target device.

Recommended for over-the-air music and streaming. Maximum bit rate in an audio frame is bps.

Recommended for surround-sound standard definition movies. Recommended for surround-sound high definition movies. Maximum rate in an audio frame is bps.